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Linux 4gvps.4gvps.com 3.10.0-1127.18.2.vz7.163.46 #1 SMP Fri Nov 20 21:47:55 MSK 2020 x86_64
  SOFT : Apache PHP : 7.4.33
/proc/self/root/usr/share/mysql-test/r/
38.135.39.45

 
[ NAME ] [ SIZE ] [ PERM ] [ DATE ] [ ACT ]
+FILE +DIR
  1st.result 0.472 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  alias.result 13.417 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  almost_full.result 1.112 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  alter_table-big.result 3.119 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  alter_table.result 108.406 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  analyze.result 2.207 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ansi.result 1.144 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  archive-big.result 0.602 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  archive.result 525.381 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  archive_bitfield.result 4.261 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  archive_debug.result 0.347 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  archive_gis.result 23.132 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  archive_no_symlink.result 0.861 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  archive_plugin.result 0.53 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  archive_symlink.result 2.068 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  audit_plugin.result 0.727 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  auth_rpl.result 1.846 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  auto_increment.result 11.723 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  backup.result 4.293 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  bench_count_distinct.result 0.451 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  big_test.require 0.017 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  bigint.result 20.723 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  binary.result 5.674 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  binary_to_hex.result 5.87 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  binlog_tx_isolation.result 1.707 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  blackhole.result 0.599 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  blackhole_plugin.result 0.558 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  bool.result 2.56 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  bootstrap.result 0.261 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  bug12427262.result 1.864 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  bug12969156.result 0.93 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  bug17076131.result 0.314 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  bug33509.result 2.306 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  bug39022.result 1.199 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  bug46080.result 0.653 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  bug46261.result 0.373 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  bug46760.result 1.259 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  bug47671.result 0.28 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  bug58669.result 0.469 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  bulk_replace.result 0.274 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  cache_innodb.result 5.419 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  case.result 10.062 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  case_insensitive_file_system.require 0.045 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  case_sensitive_file_system.require 0.046 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  cast.result 15.755 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  change_user.result 3.31 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  check.result 1.423 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  check_auto_permission.result 0.245 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  check_var_limit.require 0.008 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  client_xml.result 2.376 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  comment_column.result 140.568 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  comment_column2.result 355.679 KB -rw-r--r-- 2021-01-05 10:19 R E G D
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  comment_table.result 28.718 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  comments.result 2.337 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  commit.result 13.321 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  commit_1innodb.result 19.194 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  compare.result 3.17 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  compress.result 56.502 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  concurrent_innodb_safelog.result 31.888 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  concurrent_innodb_unsafelog.result 31.614 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  connect.result 12.747 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  connect_debug.result 1.481 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  consistent_snapshot.result 1.144 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  constraints.result 2.551 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  count_distinct.result 7.89 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  count_distinct2.result 2.215 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  count_distinct3.result 0.271 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  create-big.result 7.604 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  create.result 147.088 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  create_not_windows.result 0.938 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  create_select_tmp.result 0.826 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  csv.result 58.878 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  csv_alter_table.result 1.168 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  csv_not_null.result 1.752 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_ascii.result 2.107 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_big5.result 33.848 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_binary.result 82.341 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_collate.result 13.504 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_cp1250_ch.result 21.882 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_cp1251.result 96.091 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_cp932.result 0.973 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_cp932_binlog_row.result 0.593 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_cp932_binlog_stm.result 251.22 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_create.result 3.12 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_errors.result 1.662 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_eucjpms.result 400.215 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_euckr.result 434.587 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_filename.result 0.316 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_filesystem.result 0.333 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_gb2312.result 33.291 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_gbk.result 49.631 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_gbk_binlog.result 0.632 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_hebrew.result 0.248 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_latin1.result 118.674 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_latin1_de.result 15.738 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_latin2.result 13.319 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_latin2_ch.result 25.112 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_ldml.result 28.05 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_like_range.result 80.895 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_many.result 42.672 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_mb.result 2.127 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_recoding.result 9.598 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_sjis.result 195.68 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_tis620.result 100.449 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_uca.result 154.97 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_ucs.result 142.403 KB -rw-r--r-- 2021-01-05 10:19 R E G D
  ctype_ucs2_def.result 1.055 KB -rw-r--r-- 2021-01-05 10:19 R E G D
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REQUEST EXIT
# The results where created without innodb persistent stats. SET @old_innodb_stats_persistent= @@global.innodb_stats_persistent; SET @@global.innodb_stats_persistent= 0; # Original tests for WL#4443 # Must have InnoDB as engine to get the same statistics results. # embedded uses MyISAM as default. CREATE SELECT uses the default engine. SET @old_default_storage_engine = @@default_storage_engine; SET @@default_storage_engine = 'InnoDB'; CREATE TABLE t1 (a int PRIMARY KEY, b varchar(128), KEY (b)) ENGINE = InnoDB PARTITION BY HASH (a) PARTITIONS 13; CREATE TABLE t2 (a int PRIMARY KEY AUTO_INCREMENT, b varchar(128)) ENGINE = InnoDB PARTITION BY HASH (a) PARTITIONS 13; # # # Test how INSERT prune locks # First test, no defaults # FLUSH STATUS; INSERT INTO t1 VALUES (1, 'First row, p1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (table + partition lock/unlock) # 1 commit FLUSH STATUS; INSERT INTO t1 VALUES (1, 'First row, duplicate'); ERROR 23000: Duplicate entry '1' for key 'PRIMARY' SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_EXTERNAL_LOCK 4 HANDLER_ROLLBACK 1 HANDLER_WRITE 18 # 4 locks (table + partition lock/unlock) # 1 rollback FLUSH STATUS; INSERT INTO t1 VALUES (0, 'First row, p0'), (2, 'First row, p2'), (3, 'First row, p3'), (4, 'First row, p4'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 10 HANDLER_WRITE 21 # 10 locks (table + 4 partition * lock/unlock) # 1 commit FLUSH STATUS; INSERT INTO t1 VALUES (1 * 13, 'Second row, p0'), (2 * 13, 'Third row, p0'), (3 * 13, 'Fourth row, p0'), (4 * 13, 'Fifth row, p0'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 21 # 4 locks (table + 1 partition lock/unlock) # 1 commit # # INSERT with auto increment, lock pruning # FLUSH STATUS; INSERT INTO t2 VALUES (NULL, 'First auto-inc row'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_WRITE 18 # Auto increment value is not known until write. # 28 locks (table + 13 partition lock/unlock) # 1 commit FLUSH STATUS; INSERT INTO t2 (b) VALUES ('Second auto-inc row'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_WRITE 18 # Auto increment value is not known until write. # 28 locks (table + 13 partition lock/unlock) # 1 commit FLUSH STATUS; INSERT INTO t2 VALUES (10, "First row, p10"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_WRITE 18 # Insert pruning on tables with auto increment is not yet supported # 28 locks (table + 13 partition lock/unlock) # 1 commit # # UPDATE with auto increment, lock pruning # FLUSH STATUS; UPDATE t2 SET b = CONCAT(b, ", UPDATED") WHERE a = 10; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 # 4 locks (table + 1 partition lock/unlock) # 1 read_key + 1 update + 1 commit # # Test of pruning with secondary column auto_inc INSERT # CREATE TABLE t3 (a INT, b INT AUTO_INCREMENT, PRIMARY KEY (a, b)) ENGINE = MyISAM PARTITION BY HASH (a) PARTITIONS 5; FLUSH STATUS; INSERT INTO t3 VALUES (1, 1); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (table + partition lock/unlock) # No commits, since MyISAM! FLUSH STATUS; INSERT INTO t3 VALUES (1, NULL); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (table + partition lock/unlock) SELECT @@sql_mode; @@sql_mode NO_ENGINE_SUBSTITUTION SET @old_sql_mode = @@sql_mode; SET @@sql_mode = 'NO_AUTO_VALUE_ON_ZERO'; SELECT @@sql_mode; @@sql_mode NO_AUTO_VALUE_ON_ZERO FLUSH STATUS; INSERT INTO t3 VALUES (1, 0); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (table + partition lock/unlock) SET @@sql_mode = @old_sql_mode; SELECT @@sql_mode; @@sql_mode NO_ENGINE_SUBSTITUTION FLUSH STATUS; INSERT INTO t3 VALUES (1, 0); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (table + partition lock/unlock) SELECT * FROM t3; a b 1 0 1 1 1 2 1 3 DROP TABLE t3; # # Test handling of INSERT INTO VALUES () # CREATE TABLE t3 (a INT, b CHAR(10)) PARTITION BY HASH (a) PARTITIONS 2; FLUSH STATUS; INSERT INTO t3 VALUES (1, "Test 1"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 VALUES (2, "Test 2"), (3, "Test 3"), (4, "Test 4"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_WRITE 20 # 6 locks (1 table, 2 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 VALUES (6, "Test 6"), (8, "Test 8"), (10, "Test 10"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 20 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 VALUES (5, "Test 5"), (7, "Test 7"), (9, "Test 9"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 20 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 VALUES (0, "Test 0"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a, b) VALUES (1, "Test 1"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a, b) VALUES (2, "Test 2"), (3, "Test 3"), (4, "Test 4"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_WRITE 20 # 6 locks (1 table, 2 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a, b) VALUES (6, "Test 6"), (8, "Test 8"), (10, "Test 10"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 20 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a, b) VALUES (5, "Test 5"), (7, "Test 7"), (9, "Test 9"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 20 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a, b) VALUES (0, "Test 0"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # # Test handling of # INSERT INTO
VALUES () # FLUSH STATUS; INSERT INTO t3 (a) VALUES (1); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES (2), (3), (4); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_WRITE 20 # 6 locks (1 table, 2 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES (6), (8), (10); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 20 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES (5), (7), (9); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 20 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (b) VALUES ("Only b 1"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (b) VALUES ("Only b 2"), ("Only b 3"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 19 # 4 locks (1 table, 1 partition lock/unlock) SELECT * FROM t3 ORDER BY a, b; a b NULL Only b 1 NULL Only b 2 NULL Only b 3 0 Test 0 0 Test 0 1 NULL 1 Test 1 1 Test 1 2 NULL 2 Test 2 2 Test 2 3 NULL 3 Test 3 3 Test 3 4 NULL 4 Test 4 4 Test 4 5 NULL 5 Test 5 5 Test 5 6 NULL 6 Test 6 6 Test 6 7 NULL 7 Test 7 7 Test 7 8 NULL 8 Test 8 8 Test 8 9 NULL 9 Test 9 9 Test 9 10 NULL 10 Test 10 10 Test 10 DROP TABLE t3; # # Test of insert pruning with subpartitions # # I've placed the varchar column before the int column for better # distribution by LINEAR KEY. CREATE TABLE t3 (a int DEFAULT 10, b varchar(64) DEFAULT "Default", c varchar(64) DEFAULT "Default", d int unsigned DEFAULT 9, e varchar(255) DEFAULT "Default-filler.filler.filler.", PRIMARY KEY (a,b,c,d)) PARTITION BY RANGE COLUMNS (a, b) SUBPARTITION BY LINEAR KEY (d, c) SUBPARTITIONS 4 (PARTITION pNeg VALUES LESS THAN (0, ""), PARTITION `p0-9` VALUES LESS THAN (9, MAXVALUE), PARTITION p10 VALUES LESS THAN (10, MAXVALUE), PARTITION `p11-100` VALUES LESS THAN (99, MAXVALUE)); # # Test INSERT with # empty field specifier list and empty value list # FLUSH STATUS; INSERT INTO t3 () VALUES (); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 subpartition lock/unlock) # # Test INSERT with # no field specifier list and full value list, including DEFAULT # specifier # FLUSH STATUS; INSERT INTO t3 VALUES (-1, "ZZZzzzz", "yyyYYY", -1, DEFAULT); Warnings: Warning 1264 Out of range value for column 'd' at row 1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 subpartition lock/unlock) # # Test INSERT with # empty field specifier list and full value list, including NULL # FLUSH STATUS; INSERT INTO t3 () VALUES (0, "", "", 0, NULL); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 subpartition lock/unlock) # # Test INSERT with field specifier list for only some fields # FLUSH STATUS; INSERT INTO t3 (a) VALUES (1); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 subpartition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a, b) VALUES (1, "Part expr fulfilled"), (10, "Part expr fulfilled"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_WRITE 19 # 6 locks (1 table, 2 subpartition lock/unlock) FLUSH STATUS; INSERT INTO t3 (d) VALUES (1), (2); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_WRITE 19 # 6 locks (1 table, 2 subpartition lock/unlock) FLUSH STATUS; INSERT INTO t3 (c, d) VALUES ("Subpart expr fulfilled", 1); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 subpartition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a, b, d) VALUES (10, "Full part, half subpart", 1), (12, "Full part, half subpart", 1), (12, "Full part, half subpart", 2), (12, "Full part, half subpart", 3), (12, "Full part, half subpart", 4), (12, "Full part, half subpart", 0); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 12 HANDLER_WRITE 23 # d = 0 and d = 4 goes to the same subpart! # 12 locks (1 table, 5 subpartition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a, b, c) VALUES (1, "Full part", "Half subpart"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 subpartition lock/unlock) # Adding 'Default' as padding to see if LINEAR KEY uses different parts. FLUSH STATUS; INSERT INTO t3 (a, c, d) VALUES (12, "Half part, full subpart", 1), (12, "Half part, full subpartDefault", 1), (12, "Half part, full subpart Default", 1); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_WRITE 20 # First and last row goes to the same subpartition. # 6 locks (1 table, 2 subpartition lock/unlock) FLUSH STATUS; INSERT INTO t3 (b, c, d) VALUES ("Half part", "Full subpart", 1); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 subpartition lock/unlock) FLUSH STATUS; # # Test INSERT with full field specifier list and full value list # INSERT INTO t3 (a, b, c, d) VALUES (1, "Full part", "Full subpart", 1); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 subpartition lock/unlock) # # Test INSERT with no field specifier list and empty value list # (need to delete previous inserted default row first...) # DELETE FROM t3 WHERE a = 10 AND b = 'Default' AND c = 'Default' AND D = 9; FLUSH STATUS; INSERT INTO t3 VALUES (); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 subpartition lock/unlock) # # Verifing result # SELECT * FROM t3; a b c d e -1 ZZZzzzz yyyYYY 0 Default-filler.filler.filler. 0 0 NULL 1 Default Default 9 Default-filler.filler.filler. 1 Full part Full subpart 1 Default-filler.filler.filler. 1 Full part Half subpart 9 Default-filler.filler.filler. 1 Part expr fulfilled Default 9 Default-filler.filler.filler. 10 Default Default 1 Default-filler.filler.filler. 10 Default Default 2 Default-filler.filler.filler. 10 Default Default 9 Default-filler.filler.filler. 10 Default Subpart expr fulfilled 1 Default-filler.filler.filler. 10 Full part, half subpart Default 1 Default-filler.filler.filler. 10 Half part Full subpart 1 Default-filler.filler.filler. 10 Part expr fulfilled Default 9 Default-filler.filler.filler. 12 Default Half part, full subpart 1 Default-filler.filler.filler. 12 Default Half part, full subpart Default 1 Default-filler.filler.filler. 12 Default Half part, full subpartDefault 1 Default-filler.filler.filler. 12 Full part, half subpart Default 0 Default-filler.filler.filler. 12 Full part, half subpart Default 1 Default-filler.filler.filler. 12 Full part, half subpart Default 2 Default-filler.filler.filler. 12 Full part, half subpart Default 3 Default-filler.filler.filler. 12 Full part, half subpart Default 4 Default-filler.filler.filler. SELECT d, c FROM t3 PARTITION(`p11-100sp0`); d c 0 Default 4 Default SELECT d, c FROM t3 PARTITION(`p11-100sp1`); d c 1 Default 1 Half part, full subpart 1 Half part, full subpart Default SELECT d, c FROM t3 PARTITION(`p11-100sp2`); d c 1 Half part, full subpartDefault 2 Default SELECT d, c FROM t3 PARTITION(`p11-100sp3`); d c 3 Default # # Test with LOCK TABLES # LOCK TABLES t3 PARTITION (`p11-100sp0`) WRITE; ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'PARTITION (`p11-100sp0`) WRITE' at line 1 FLUSH STATUS; LOCK TABLES t3 WRITE; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 17 HANDLER_WRITE 17 # 17 locks (1 table, 16 partitions lock) # No further locks/unlocks until UNLOCK TABLES. # # Test INSERT with no field specifier list and empty value list # (need to delete previous inserted default row first...) # DELETE FROM t3 WHERE a = 10 AND b = 'Default' AND c = 'Default' AND D = 9; FLUSH STATUS; INSERT INTO t3 VALUES (); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_WRITE 18 FLUSH STATUS; # # Test INSERT with field specifier list for only some fields # (need to delete previous inserted default row first...) # DELETE FROM t3 WHERE a = 10 AND b = "Default" AND c = "Default" AND d = 9; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_READ_KEY 1 HANDLER_WRITE 17 FLUSH STATUS; INSERT INTO t3 (b, d, e) VALUES (DEFAULT, DEFAULT, "All default!"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_WRITE 18 FLUSH STATUS; # # Test UPDATE of non PK field in default row # UPDATE t3 SET e = CONCAT(e, ", updated") WHERE a = 10 AND b = "Default" AND c = "Default" AND d = 9; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 FLUSH STATUS; # # Test UPDATE of PK field + non PK field in default row # UPDATE t3 SET a = DEFAULT, b = "Not DEFAULT!", e = CONCAT(e, ", updated2") WHERE a = 10 AND b = "Default" AND c = "Default" AND d = 9; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_READ_KEY 2 HANDLER_READ_RND 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 FLUSH STATUS; # # Test REPLACE of default row (INSERT, since not duplicate) # REPLACE INTO t3 (e) VALUES ("New default row"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_WRITE 18 FLUSH STATUS; SELECT * FROM t3 WHERE a = 10 AND b = "Default" AND c = "Default" AND d = 9; a b c d e 10 Default Default 9 New default row SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_READ_KEY 1 HANDLER_WRITE 17 FLUSH STATUS; EXPLAIN PARTITIONS SELECT * FROM t3 WHERE a = 10 AND b = "Default" AND c = "Default" AND d = 9; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t3 p10_p10sp1 const PRIMARY PRIMARY 140 const,const,const,const # NULL SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_READ_KEY 1 HANDLER_WRITE 17 FLUSH STATUS; # # Test REPLACE of default row (REPLACE, since duplicate exists) # REPLACE INTO t3 (e) VALUES ("Newest default row"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # # Test SELECT with explicit partition selection # FLUSH STATUS; SELECT * FROM t3 PARTITION (p10); a b c d e 10 Default Default 1 Default-filler.filler.filler. 10 Default Default 2 Default-filler.filler.filler. 10 Default Default 9 Newest default row 10 Default Subpart expr fulfilled 1 Default-filler.filler.filler. 10 Full part, half subpart Default 1 Default-filler.filler.filler. 10 Half part Full subpart 1 Default-filler.filler.filler. 10 Not DEFAULT! Default 9 All default!, updated, updated2 10 Part expr fulfilled Default 9 Default-filler.filler.filler. SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_READ_FIRST 4 HANDLER_READ_KEY 4 HANDLER_READ_RND_NEXT 12 HANDLER_WRITE 17 FLUSH STATUS; EXPLAIN PARTITIONS SELECT * FROM t3 PARTITION (p10); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t3 p10_p10sp0,p10_p10sp1,p10_p10sp2,p10_p10sp3 ALL NULL NULL NULL NULL # NULL SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_WRITE 17 FLUSH STATUS; UNLOCK TABLES; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_EXTERNAL_LOCK 17 HANDLER_WRITE 17 # 17 locks (1 table, 16 partitions unlock) DROP TABLE t3; # # End of LOCK TABLE test. # # # Test INSERT with timestamp column NO default function # SELECT UNIX_TIMESTAMP('2011-01-01 00:00:00') as time_t, UNIX_TIMESTAMP('2011-01-01 00:00:00') % 3 as part, 1234567890 % 3 as part2; time_t part part2 1293829200 0 0 CREATE TABLE t3 (a timestamp DEFAULT 0, b char(10), PRIMARY KEY (a)) PARTITION BY HASH (UNIX_TIMESTAMP(a)) PARTITIONS 3; SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `a` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00', `b` char(10) DEFAULT NULL, PRIMARY KEY (`a`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 /*!50100 PARTITION BY HASH (UNIX_TIMESTAMP(a)) PARTITIONS 3 */ FLUSH STATUS; SET TIMESTAMP = 1234567890; INSERT INTO t3 (a) VALUES (NULL); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; SET TIMESTAMP = 1234567891; INSERT INTO t3 VALUES (); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:00'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:01'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:02'), ('2011-01-01 00:00:03'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_WRITE 19 # 6 locks (1 table, 2 partition lock/unlock) # 2 writes FLUSH STATUS; SET TIMESTAMP = 1234567892; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:00') ON DUPLICATE KEY UPDATE b = "DUP_KEY"; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update (same partition) # 1 (failed) write FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:01') ON DUPLICATE KEY UPDATE a = '2011-01-01 00:00:05', b = "DUP_KEY2"; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 1 HANDLER_WRITE 19 # 8 locks (1 table, 3 partition lock/unlock) # No pruning due to updating partitioning field. # 1 read_key + 1 delete + 2 write (1 failed + 1 ok) # 1 delete + 1 write due to moved to different partition FLUSH STATUS; SET TIMESTAMP = 1234567893; UPDATE t3 SET b = 'Updated' WHERE a = '2011-01-01 00:00:02'; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update (same partition) # 1 (failed) write FLUSH STATUS; REPLACE INTO t3 VALUES ('2011-01-01 00:00:04', 'Replace1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; REPLACE INTO t3 VALUES ('2011-01-01 00:00:04', 'Replace2'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update + 1 failed write # # Test of replace of default PK (delete might be needed first) # DELETE FROM t3 WHERE a = 0; FLUSH STATUS; SET TIMESTAMP = 1234567894; REPLACE INTO t3 (b) VALUES ('Replace3'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; SET TIMESTAMP = 1234567894; REPLACE INTO t3 (b) VALUES ('Replace4'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update + 1 failed write SELECT * FROM t3; a b 0000-00-00 00:00:00 Replace4 2009-02-14 02:31:30 NULL 2011-01-01 00:00:00 DUP_KEY 2011-01-01 00:00:02 Updated 2011-01-01 00:00:03 NULL 2011-01-01 00:00:04 Replace2 2011-01-01 00:00:05 DUP_KEY2 DROP TABLE t3; # # Test INSERT with timestamp column DEFAULT INSERT + UPDATE # CREATE TABLE t3 (a timestamp DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, b char(10), PRIMARY KEY (a)) PARTITION BY HASH (UNIX_TIMESTAMP(a)) PARTITIONS 3; SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `a` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, `b` char(10) DEFAULT NULL, PRIMARY KEY (`a`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 /*!50100 PARTITION BY HASH (UNIX_TIMESTAMP(a)) PARTITIONS 3 */ FLUSH STATUS; SET TIMESTAMP = 1234567890; INSERT INTO t3 (a) VALUES (NULL); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; SET TIMESTAMP = 1234567891; INSERT INTO t3 VALUES (); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:00'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:01'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:02'), ('2011-01-01 00:00:03'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_WRITE 19 # 6 locks (1 table, 2 partition lock/unlock) # 2 writes FLUSH STATUS; SET TIMESTAMP = 1234567892; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:00') ON DUPLICATE KEY UPDATE b = "DUP_KEY"; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 1 HANDLER_WRITE 19 # 8 locks (1 table, 3 partition lock/unlock) # No pruning due to DEFAULT function on partitioning column # 1 read_key + 1 delete + 2 write (1 failed + 1 ok) # 1 delete + 1 write due to moved to different partition FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:01') ON DUPLICATE KEY UPDATE a = '2011-01-01 00:00:05', b = "DUP_KEY2"; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 1 HANDLER_WRITE 19 # 8 locks (1 table, 3 partition lock/unlock) # No pruning due to updating partitioning field. # 1 read_key + 1 delete + 2 write (1 failed + 1 ok) # 1 delete + 1 write due to moved to different partition FLUSH STATUS; SET TIMESTAMP = 1234567893; UPDATE t3 SET b = 'Updated' WHERE a = '2011-01-01 00:00:02'; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 2 HANDLER_READ_RND 1 HANDLER_WRITE 18 # 8 locks (1 table, 3 partition lock/unlock) # No pruning due to DEFAULT function on partitioning column # 2 read_key + 1 read_rnd (1 read_key due to index lookup, # 1 read_rnd + 1 read_key due to positioning before update) # 1 delete + 1 write due to moved to different partition # + 1 (failed) write FLUSH STATUS; REPLACE INTO t3 VALUES ('2011-01-01 00:00:04', 'Replace1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; REPLACE INTO t3 VALUES ('2011-01-01 00:00:04', 'Replace2'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update + 1 failed write # # Test of replace of default PK (delete might be needed first) # DELETE FROM t3 WHERE a = 0; FLUSH STATUS; SET TIMESTAMP = 1234567894; REPLACE INTO t3 (b) VALUES ('Replace3'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; SET TIMESTAMP = 1234567894; REPLACE INTO t3 (b) VALUES ('Replace4'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update + 1 failed write SELECT * FROM t3; a b 2009-02-14 02:31:30 NULL 2009-02-14 02:31:31 NULL 2009-02-14 02:31:32 DUP_KEY 2009-02-14 02:31:33 Updated 2009-02-14 02:31:34 Replace4 2011-01-01 00:00:03 NULL 2011-01-01 00:00:04 Replace2 2011-01-01 00:00:05 DUP_KEY2 DROP TABLE t3; # # Test INSERT with timestamp column DEFAULT UPDATE # CREATE TABLE t3 (a timestamp DEFAULT 0 ON UPDATE CURRENT_TIMESTAMP, b char(10), PRIMARY KEY (a)) PARTITION BY HASH (UNIX_TIMESTAMP(a)) PARTITIONS 3; SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `a` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00' ON UPDATE CURRENT_TIMESTAMP, `b` char(10) DEFAULT NULL, PRIMARY KEY (`a`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 /*!50100 PARTITION BY HASH (UNIX_TIMESTAMP(a)) PARTITIONS 3 */ FLUSH STATUS; SET TIMESTAMP = 1234567890; INSERT INTO t3 (a) VALUES (NULL); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; SET TIMESTAMP = 1234567891; INSERT INTO t3 VALUES (); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:00'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:01'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:02'), ('2011-01-01 00:00:03'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_WRITE 19 # 6 locks (1 table, 2 partition lock/unlock) # 2 writes FLUSH STATUS; SET TIMESTAMP = 1234567892; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:00') ON DUPLICATE KEY UPDATE b = "DUP_KEY"; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 1 HANDLER_WRITE 19 # 8 locks (1 table, 3 partition lock/unlock) # No pruning due to DEFAULT function on partitioning column # 1 read_key + 1 delete + 2 write (1 failed + 1 ok) # 1 delete + 1 write due to moved to different partition FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:01') ON DUPLICATE KEY UPDATE a = '2011-01-01 00:00:05', b = "DUP_KEY2"; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 1 HANDLER_WRITE 19 # 8 locks (1 table, 3 partition lock/unlock) # No pruning due to updating partitioning field. # 1 read_key + 1 delete + 2 write (1 failed + 1 ok) # 1 delete + 1 write due to moved to different partition FLUSH STATUS; SET TIMESTAMP = 1234567893; UPDATE t3 SET b = 'Updated' WHERE a = '2011-01-01 00:00:02'; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 2 HANDLER_READ_RND 1 HANDLER_WRITE 18 # 8 locks (1 table, 3 partition lock/unlock) # No pruning due to DEFAULT function on partitioning column # 2 read_key + 1 read_rnd (1 read_key due to index lookup, # 1 read_rnd + 1 read_key due to positioning before update) # 1 delete + 1 write due to moved to different partition # + 1 (failed) write FLUSH STATUS; REPLACE INTO t3 VALUES ('2011-01-01 00:00:04', 'Replace1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; REPLACE INTO t3 VALUES ('2011-01-01 00:00:04', 'Replace2'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update + 1 failed write # # Test of replace of default PK (delete might be needed first) # DELETE FROM t3 WHERE a = 0; FLUSH STATUS; SET TIMESTAMP = 1234567894; REPLACE INTO t3 (b) VALUES ('Replace3'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; SET TIMESTAMP = 1234567894; REPLACE INTO t3 (b) VALUES ('Replace4'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update + 1 failed write SELECT * FROM t3; a b 0000-00-00 00:00:00 Replace4 2009-02-14 02:31:30 NULL 2009-02-14 02:31:32 DUP_KEY 2009-02-14 02:31:33 Updated 2011-01-01 00:00:03 NULL 2011-01-01 00:00:04 Replace2 2011-01-01 00:00:05 DUP_KEY2 DROP TABLE t3; # # Test INSERT with timestamp column DEFAULT INSERT # CREATE TABLE t3 (a timestamp DEFAULT CURRENT_TIMESTAMP, b char(10), PRIMARY KEY (a)) PARTITION BY HASH (UNIX_TIMESTAMP(a)) PARTITIONS 3; SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `a` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, `b` char(10) DEFAULT NULL, PRIMARY KEY (`a`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 /*!50100 PARTITION BY HASH (UNIX_TIMESTAMP(a)) PARTITIONS 3 */ FLUSH STATUS; SET TIMESTAMP = 1234567890; INSERT INTO t3 (a) VALUES (NULL); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; SET TIMESTAMP = 1234567891; INSERT INTO t3 VALUES (); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:00'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:01'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:02'), ('2011-01-01 00:00:03'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_WRITE 19 # 6 locks (1 table, 2 partition lock/unlock) # 2 writes FLUSH STATUS; SET TIMESTAMP = 1234567892; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:00') ON DUPLICATE KEY UPDATE b = "DUP_KEY"; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update (same partition) # 1 (failed) write FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:01') ON DUPLICATE KEY UPDATE a = '2011-01-01 00:00:05', b = "DUP_KEY2"; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 1 HANDLER_WRITE 19 # 8 locks (1 table, 3 partition lock/unlock) # No pruning due to updating partitioning field. # 1 read_key + 1 delete + 2 write (1 failed + 1 ok) # 1 delete + 1 write due to moved to different partition FLUSH STATUS; SET TIMESTAMP = 1234567893; UPDATE t3 SET b = 'Updated' WHERE a = '2011-01-01 00:00:02'; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update (same partition) # 1 (failed) write FLUSH STATUS; REPLACE INTO t3 VALUES ('2011-01-01 00:00:04', 'Replace1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; REPLACE INTO t3 VALUES ('2011-01-01 00:00:04', 'Replace2'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update + 1 failed write # # Test of replace of default PK (delete might be needed first) # DELETE FROM t3 WHERE a = 0; FLUSH STATUS; SET TIMESTAMP = 1234567894; REPLACE INTO t3 (b) VALUES ('Replace3'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; SET TIMESTAMP = 1234567894; REPLACE INTO t3 (b) VALUES ('Replace4'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update + 1 failed write SELECT * FROM t3; a b 2009-02-14 02:31:30 NULL 2009-02-14 02:31:31 NULL 2009-02-14 02:31:34 Replace4 2011-01-01 00:00:00 DUP_KEY 2011-01-01 00:00:02 Updated 2011-01-01 00:00:03 NULL 2011-01-01 00:00:04 Replace2 2011-01-01 00:00:05 DUP_KEY2 DROP TABLE t3; # # Test INSERT with DATETIME column NO default function # CREATE TABLE t3 (a DATETIME DEFAULT 0, b char(10), PRIMARY KEY (a)) PARTITION BY KEY (a) PARTITIONS 3; SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `a` datetime NOT NULL DEFAULT '0000-00-00 00:00:00', `b` char(10) DEFAULT NULL, PRIMARY KEY (`a`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 /*!50100 PARTITION BY KEY (a) PARTITIONS 3 */ FLUSH STATUS; SET TIMESTAMP = 1234567891; INSERT INTO t3 VALUES (); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:00'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:01'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:02'), ('2011-01-01 00:00:03'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_WRITE 19 # 6 locks (1 table, 2 partition lock/unlock) # 2 writes FLUSH STATUS; SET TIMESTAMP = 1234567892; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:00') ON DUPLICATE KEY UPDATE b = "DUP_KEY"; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update (same partition) # 1 (failed) write FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:01') ON DUPLICATE KEY UPDATE a = '2011-01-01 00:00:05', b = "DUP_KEY2"; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 1 HANDLER_WRITE 19 # 8 locks (1 table, 3 partition lock/unlock) # No pruning due to updating partitioning field. # 1 read_key + 1 delete + 2 write (1 failed + 1 ok) # 1 delete + 1 write due to moved to different partition FLUSH STATUS; SET TIMESTAMP = 1234567893; UPDATE t3 SET b = 'Updated' WHERE a = '2011-01-01 00:00:02'; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update (same partition) # 1 (failed) write FLUSH STATUS; REPLACE INTO t3 VALUES ('2011-01-01 00:00:04', 'Replace1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; REPLACE INTO t3 VALUES ('2011-01-01 00:00:04', 'Replace2'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update + 1 failed write # # Test of replace of default PK (delete might be needed first) # DELETE FROM t3 WHERE a = 0; FLUSH STATUS; SET TIMESTAMP = 1234567894; REPLACE INTO t3 (b) VALUES ('Replace3'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; SET TIMESTAMP = 1234567894; REPLACE INTO t3 (b) VALUES ('Replace4'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update + 1 failed write SELECT * FROM t3; a b 0000-00-00 00:00:00 Replace4 2011-01-01 00:00:00 DUP_KEY 2011-01-01 00:00:02 Updated 2011-01-01 00:00:03 NULL 2011-01-01 00:00:04 Replace2 2011-01-01 00:00:05 DUP_KEY2 DROP TABLE t3; # # Test INSERT with DATETIME column DEFAULT INSERT + UPDATE # CREATE TABLE t3 (a DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, b char(10), PRIMARY KEY (a)) PARTITION BY KEY (a) PARTITIONS 3; SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `a` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, `b` char(10) DEFAULT NULL, PRIMARY KEY (`a`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 /*!50100 PARTITION BY KEY (a) PARTITIONS 3 */ FLUSH STATUS; SET TIMESTAMP = 1234567891; INSERT INTO t3 VALUES (); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:00'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:01'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:02'), ('2011-01-01 00:00:03'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_WRITE 19 # 6 locks (1 table, 2 partition lock/unlock) # 2 writes FLUSH STATUS; SET TIMESTAMP = 1234567892; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:00') ON DUPLICATE KEY UPDATE b = "DUP_KEY"; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 1 HANDLER_WRITE 19 # 8 locks (1 table, 3 partition lock/unlock) # No pruning due to DEFAULT function on partitioning column # 1 read_key + 1 delete + 2 write (1 failed + 1 ok) # 1 delete + 1 write due to moved to different partition FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:01') ON DUPLICATE KEY UPDATE a = '2011-01-01 00:00:05', b = "DUP_KEY2"; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 1 HANDLER_WRITE 19 # 8 locks (1 table, 3 partition lock/unlock) # No pruning due to updating partitioning field. # 1 read_key + 1 delete + 2 write (1 failed + 1 ok) # 1 delete + 1 write due to moved to different partition FLUSH STATUS; SET TIMESTAMP = 1234567893; UPDATE t3 SET b = 'Updated' WHERE a = '2011-01-01 00:00:02'; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 2 HANDLER_READ_RND 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 # 8 locks (1 table, 3 partition lock/unlock) # No pruning due to DEFAULT function on partitioning column # 2 read_key + 1 read_rnd (1 read_key due to index lookup, # 1 read_rnd + 1 read_key due to positioning before update) # 1 delete + 1 write due to moved to different partition # + 1 (failed) write FLUSH STATUS; REPLACE INTO t3 VALUES ('2011-01-01 00:00:04', 'Replace1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; REPLACE INTO t3 VALUES ('2011-01-01 00:00:04', 'Replace2'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update + 1 failed write # # Test of replace of default PK (delete might be needed first) # DELETE FROM t3 WHERE a = 0; FLUSH STATUS; SET TIMESTAMP = 1234567894; REPLACE INTO t3 (b) VALUES ('Replace3'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; SET TIMESTAMP = 1234567894; REPLACE INTO t3 (b) VALUES ('Replace4'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update + 1 failed write SELECT * FROM t3; a b 2009-02-14 02:31:31 NULL 2009-02-14 02:31:32 DUP_KEY 2009-02-14 02:31:33 Updated 2009-02-14 02:31:34 Replace4 2011-01-01 00:00:03 NULL 2011-01-01 00:00:04 Replace2 2011-01-01 00:00:05 DUP_KEY2 DROP TABLE t3; # # Test INSERT with DATETIME column DEFAULT UPDATE # CREATE TABLE t3 (a DATETIME DEFAULT 0 ON UPDATE CURRENT_TIMESTAMP, b char(10), PRIMARY KEY (a)) PARTITION BY KEY (a) PARTITIONS 3; SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `a` datetime NOT NULL DEFAULT '0000-00-00 00:00:00' ON UPDATE CURRENT_TIMESTAMP, `b` char(10) DEFAULT NULL, PRIMARY KEY (`a`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 /*!50100 PARTITION BY KEY (a) PARTITIONS 3 */ FLUSH STATUS; SET TIMESTAMP = 1234567891; INSERT INTO t3 VALUES (); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:00'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:01'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:02'), ('2011-01-01 00:00:03'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_WRITE 19 # 6 locks (1 table, 2 partition lock/unlock) # 2 writes FLUSH STATUS; SET TIMESTAMP = 1234567892; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:00') ON DUPLICATE KEY UPDATE b = "DUP_KEY"; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 1 HANDLER_WRITE 19 # 8 locks (1 table, 3 partition lock/unlock) # No pruning due to DEFAULT function on partitioning column # 1 read_key + 1 delete + 2 write (1 failed + 1 ok) # 1 delete + 1 write due to moved to different partition FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:01') ON DUPLICATE KEY UPDATE a = '2011-01-01 00:00:05', b = "DUP_KEY2"; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 1 HANDLER_WRITE 19 # 8 locks (1 table, 3 partition lock/unlock) # No pruning due to updating partitioning field. # 1 read_key + 1 delete + 2 write (1 failed + 1 ok) # 1 delete + 1 write due to moved to different partition FLUSH STATUS; SET TIMESTAMP = 1234567893; UPDATE t3 SET b = 'Updated' WHERE a = '2011-01-01 00:00:02'; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 2 HANDLER_READ_RND 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 # 8 locks (1 table, 3 partition lock/unlock) # No pruning due to DEFAULT function on partitioning column # 2 read_key + 1 read_rnd (1 read_key due to index lookup, # 1 read_rnd + 1 read_key due to positioning before update) # 1 delete + 1 write due to moved to different partition # + 1 (failed) write FLUSH STATUS; REPLACE INTO t3 VALUES ('2011-01-01 00:00:04', 'Replace1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; REPLACE INTO t3 VALUES ('2011-01-01 00:00:04', 'Replace2'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update + 1 failed write # # Test of replace of default PK (delete might be needed first) # DELETE FROM t3 WHERE a = 0; FLUSH STATUS; SET TIMESTAMP = 1234567894; REPLACE INTO t3 (b) VALUES ('Replace3'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; SET TIMESTAMP = 1234567894; REPLACE INTO t3 (b) VALUES ('Replace4'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update + 1 failed write SELECT * FROM t3; a b 0000-00-00 00:00:00 Replace4 2009-02-14 02:31:32 DUP_KEY 2009-02-14 02:31:33 Updated 2011-01-01 00:00:03 NULL 2011-01-01 00:00:04 Replace2 2011-01-01 00:00:05 DUP_KEY2 DROP TABLE t3; # # Test INSERT with DATETIME column DEFAULT INSERT # CREATE TABLE t3 (a DATETIME DEFAULT CURRENT_TIMESTAMP, b char(10), PRIMARY KEY (a)) PARTITION BY KEY (a) PARTITIONS 3; SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `a` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP, `b` char(10) DEFAULT NULL, PRIMARY KEY (`a`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 /*!50100 PARTITION BY KEY (a) PARTITIONS 3 */ FLUSH STATUS; SET TIMESTAMP = 1234567891; INSERT INTO t3 VALUES (); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:00'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:01'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:02'), ('2011-01-01 00:00:03'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_WRITE 19 # 6 locks (1 table, 2 partition lock/unlock) # 2 writes FLUSH STATUS; SET TIMESTAMP = 1234567892; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:00') ON DUPLICATE KEY UPDATE b = "DUP_KEY"; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update (same partition) # 1 (failed) write FLUSH STATUS; INSERT INTO t3 (a) VALUES ('2011-01-01 00:00:01') ON DUPLICATE KEY UPDATE a = '2011-01-01 00:00:05', b = "DUP_KEY2"; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 1 HANDLER_WRITE 19 # 8 locks (1 table, 3 partition lock/unlock) # No pruning due to updating partitioning field. # 1 read_key + 1 delete + 2 write (1 failed + 1 ok) # 1 delete + 1 write due to moved to different partition FLUSH STATUS; SET TIMESTAMP = 1234567893; UPDATE t3 SET b = 'Updated' WHERE a = '2011-01-01 00:00:02'; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update (same partition) # 1 (failed) write FLUSH STATUS; REPLACE INTO t3 VALUES ('2011-01-01 00:00:04', 'Replace1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; REPLACE INTO t3 VALUES ('2011-01-01 00:00:04', 'Replace2'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update + 1 failed write # # Test of replace of default PK (delete might be needed first) # DELETE FROM t3 WHERE a = 0; FLUSH STATUS; SET TIMESTAMP = 1234567894; REPLACE INTO t3 (b) VALUES ('Replace3'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; SET TIMESTAMP = 1234567894; REPLACE INTO t3 (b) VALUES ('Replace4'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) # 1 read_key + 1 update + 1 failed write SELECT * FROM t3; a b 2009-02-14 02:31:31 NULL 2009-02-14 02:31:34 Replace4 2011-01-01 00:00:00 DUP_KEY 2011-01-01 00:00:02 Updated 2011-01-01 00:00:03 NULL 2011-01-01 00:00:04 Replace2 2011-01-01 00:00:05 DUP_KEY2 DROP TABLE t3; # # Test INSERT SELECT # FLUSH STATUS; TRUNCATE TABLE t2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_WRITE 17 # All partitions needs to be locked # 28 locks (table + 13 partition lock/unlock) # 1 commit FLUSH STATUS; INSERT INTO t2 SELECT a, b FROM t1 WHERE a IN (1,4); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 34 HANDLER_READ_FIRST 2 HANDLER_READ_KEY 2 HANDLER_READ_NEXT 2 HANDLER_WRITE 19 # All partitions in t2 needs to be locked (no propagation from t1 yet). # 2 partitions in t1 needs to be locked (for 1 and 4) # 34 locks (2 table + 15 partition lock/unlock) # 2 read_first, read_key and read_next. # 1 commit # # Test TRUNCATE PARTITION # FLUSH STATUS; ALTER TABLE t2 TRUNCATE PARTITION p1; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 17 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO t2 SELECT a, b FROM t1 WHERE a = 1; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 32 HANDLER_READ_KEY 1 HANDLER_WRITE 18 # 32 locks (2 table + 13 + 1 partitions) # # Test insert on duplicated key update # FLUSH STATUS; INSERT INTO t1 VALUES (65, "No duplicate") ON DUPLICATE KEY UPDATE b = CONCAT(b, ", INSERT_DUP_KEY_UPDATE"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 lock (1 table + 1 partition lock/unlock) # 1 write (insert) # 1 commit FLUSH STATUS; INSERT INTO t1 VALUES (65, "No duplicate") ON DUPLICATE KEY UPDATE b = CONCAT(b, ", INSERT_DUP_KEY_UPDATE"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 lock (1 table + 1 partition lock/unlock) # 1 read_key # 1 update # 1 commit FLUSH STATUS; INSERT INTO t1 VALUES (78, "No duplicate") ON DUPLICATE KEY UPDATE a = a + 13, b = CONCAT(b, ", INSERT_DUP_KEY_UPDATE"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_WRITE 18 # If a partitioning column is updated, no pruning # 28 lock (1 table + 13 partition lock/unlock) # 1 write (insert) # 1 commit FLUSH STATUS; INSERT INTO t1 VALUES (78, "No duplicate") ON DUPLICATE KEY UPDATE a = a + 13, b = CONCAT(b, ", INSERT_DUP_KEY_UPDATE"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # If partitioning column is updated, no pruning # 28 lock (1 table + 13 partition lock/unlock) # 1 read_key # 1 update # 1 commit # # Test of insert on duplicate key with failed update # FLUSH STATUS; INSERT INTO t1 VALUES (78, "No duplicate") ON DUPLICATE KEY UPDATE a = a + 13, b = CONCAT(b, ", INSERT_DUP_KEY_UPDATE third"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_WRITE 18 # If partitioning column is updated, no pruning # 28 lock (1 table + 13 partition lock/unlock) # 1 commit FLUSH STATUS; INSERT INTO t1 VALUES (78, "No duplicate") ON DUPLICATE KEY UPDATE a = a + 13, b = CONCAT(b, ", INSERT_DUP_KEY_UPDATE fail?"); ERROR 23000: Duplicate entry '91' for key 'PRIMARY' SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_KEY 1 HANDLER_ROLLBACK 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # If partitioning column is updated, no pruning # 28 lock (1 table + 13 partition lock/unlock) # 1 read_key # 1 update # 1 rollback # # Test of insert on duplicate key with update to different partition # FLUSH STATUS; INSERT INTO t1 VALUES (104, "No duplicate") ON DUPLICATE KEY UPDATE a = a + 1; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_WRITE 18 # If partitioning column is updated, no pruning # 28 lock (1 table + 13 partition lock/unlock) # 1 write # 1 commit FLUSH STATUS; INSERT INTO t1 VALUES (104, "No duplicate") ON DUPLICATE KEY UPDATE a = a + 1; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_KEY 1 HANDLER_WRITE 19 # If partitioning column is updated, no pruning # 28 lock (1 table + 13 partition lock/unlock) # 1 delete # 1 write # 1 read_key # 1 commit FLUSH STATUS; INSERT INTO t1 VALUES (104, "No duplicate 104") ON DUPLICATE KEY UPDATE a = a + 1; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_WRITE 18 # If partitioning column is updated, no pruning # 28 lock (1 table + 13 partition lock/unlock) # 1 write # 1 commit # # Test of insert on duplicate key with failed update to different # partition # FLUSH STATUS; INSERT INTO t1 VALUES (104, "No duplicate 104 + 1") ON DUPLICATE KEY UPDATE a = a + 1; ERROR 23000: Duplicate entry '105' for key 'PRIMARY' SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_KEY 1 HANDLER_ROLLBACK 1 HANDLER_WRITE 19 # If partitioning column is updated, no pruning # 28 lock (1 table + 13 partition lock/unlock) # 1 write # 1 read_key # 1 rollback # # Test replace # FLUSH STATUS; REPLACE INTO t1 VALUES (5, "REPLACE first"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 lock (1 table + 1 partition lock/unlock) # 1 write # 1 commit FLUSH STATUS; REPLACE INTO t1 VALUES (5, "REPLACE second"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 lock (1 table + 1 partition lock/unlock) # 1 write # 1 read_key # 1 update (NOTE: write_record() may cheat instead of delete/insert!) # 1 rollback # # Test SELECT # FLUSH STATUS; SELECT * FROM t1 ORDER BY a; a b 0 First row, p0 1 First row, p1 2 First row, p2 3 First row, p3 4 First row, p4 5 REPLACE second 13 Second row, p0 26 Third row, p0 39 Fourth row, p0 52 Fifth row, p0 65 No duplicate, INSERT_DUP_KEY_UPDATE 78 No duplicate 91 No duplicate, INSERT_DUP_KEY_UPDATE 104 No duplicate 104 105 No duplicate SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_FIRST 13 HANDLER_READ_KEY 13 HANDLER_READ_NEXT 15 HANDLER_WRITE 17 # 28 locks # 13 read_first # 13 read_key # 15 read_next FLUSH STATUS; SELECT * FROM t1 WHERE a IN (0, 1, 4) ORDER BY a; a b 0 First row, p0 1 First row, p1 4 First row, p4 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 12 HANDLER_WRITE 17 # 8 locks (1 table + 3 partitions lock/unlock) # 3 read_first, read_key # 12 read_next FLUSH STATUS; SELECT * FROM t1 WHERE a IN (13, 26, 39, 52); a b 13 Second row, p0 26 Third row, p0 39 Fourth row, p0 52 Fifth row, p0 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 1 HANDLER_READ_NEXT 9 HANDLER_WRITE 17 # 4 locks (1 table + 1 partitions lock/unlock) # 1 read_first, read_key # 9 read_next FLUSH STATUS; SELECT * FROM t1 WHERE a = 3; a b 3 First row, p3 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_WRITE 17 # 4 locks # 1 read_key FLUSH STATUS; SELECT * FROM t1 WHERE b LIKE 'First%' ORDER BY a; a b 0 First row, p0 1 First row, p1 2 First row, p2 3 First row, p3 4 First row, p4 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_KEY 13 HANDLER_READ_NEXT 5 HANDLER_WRITE 17 # 28 locks # 13 read_key # 5 read_next # # Test EXPLAIN SELECT # FLUSH STATUS; EXPLAIN PARTITIONS SELECT * FROM t1; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12 index NULL b 131 NULL # Using index SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_WRITE 17 # 28 locks (1 table + 13 partition lock/unlock) FLUSH STATUS; EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a IN (0, 1, 4) ORDER BY a; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p0,p1,p4 index PRIMARY PRIMARY 4 NULL # Using where SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_WRITE 17 # 8 locks (1 table + 3 partition lock/unlock) FLUSH STATUS; EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a IN (13, 26, 39, 52); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p0 index PRIMARY b 131 NULL # Using where; Using index SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 17 # 4 locks (1 table + 1 partition lock/unlock) FLUSH STATUS; EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = 3; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p3 const PRIMARY PRIMARY 4 const # NULL SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_WRITE 17 # 4 locks (1 table + 1 partition lock/unlock) FLUSH STATUS; EXPLAIN PARTITIONS SELECT * FROM t1 WHERE b LIKE 'First%' ORDER BY a; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12 range b b 131 NULL # Using where; Using index; Using filesort SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_WRITE 17 # 28 locks (1 table + 13 partition lock/unlock) # # Test pruning of non static values # They will need to lock all partitions, but will allow scan pruning # due to a second pruning call in optimize. # CREATE TABLE t3 (a INT); INSERT INTO t3 VALUES (1); FLUSH STATUS; SELECT * FROM t1 WHERE a = (SELECT a FROM t3); a b 1 First row, p1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 30 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 2 HANDLER_READ_RND_NEXT 2 HANDLER_WRITE 17 # 30 locks (2 table + 13 partitions lock/unlock) # 1 read_first (NOTE only reads from one partition!) # 2 read_key # 2 read_rnd_next FLUSH STATUS; SELECT t1.a FROM t1 INNER JOIN t3 ON t1.a = t3.a; a 1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 30 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 2 HANDLER_READ_RND_NEXT 2 HANDLER_WRITE 17 # 30 locks (2 table + 13 partitions lock/unlock) # 1 read_first (NOTE only reads from one partition!) # 2 read_key FLUSH STATUS; EXPLAIN PARTITIONS SELECT t1.a, t1.b FROM t1 INNER JOIN t3 ON t1.a = t3.a; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t3 NULL ALL NULL NULL NULL NULL # Using where 1 SIMPLE t1 p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12 eq_ref PRIMARY PRIMARY 4 test.t3.a # NULL SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 30 HANDLER_WRITE 17 # 30 locks (2 table + 13 partitions lock/unlock) FLUSH STATUS; EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = (SELECT a FROM t3); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t1 p1 const PRIMARY PRIMARY 4 const # NULL 2 SUBQUERY t3 NULL ALL NULL NULL NULL NULL # NULL SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 30 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 2 HANDLER_READ_RND_NEXT 2 HANDLER_WRITE 17 # 30 locks (2 table + 13 partitions lock/unlock) FLUSH STATUS; SELECT * FROM t1 WHERE a = 1; a b 1 First row, p1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_WRITE 17 # 4 locks # 1 read_key FLUSH STATUS; SELECT * FROM t1 WHERE a = (SELECT COUNT(*) FROM t3); a b 1 First row, p1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 30 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 2 HANDLER_READ_RND_NEXT 2 HANDLER_WRITE 17 # 30 locks (2 table + 13 partitions lock/unlock) # 1 read_first # 2 read_key, read_rnd_next # # Test of non indexed partition column # CREATE TABLE t4 SELECT a, b FROM t1; ALTER TABLE t4 PARTITION BY HASH (a) PARTITIONS 5; FLUSH STATUS; SELECT * FROM t4 WHERE a = (SELECT a FROM t3); a b 1 First row, p1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 14 HANDLER_READ_FIRST 2 HANDLER_READ_KEY 2 HANDLER_READ_RND_NEXT 6 HANDLER_WRITE 17 # 14 locks (2 tables + 5 partitions lock/unlock) # 2 read_first, read_key # 6 read_rnd_next FLUSH STATUS; EXPLAIN PARTITIONS SELECT * FROM t4 WHERE a = (SELECT a FROM t3); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t4 p1 ALL NULL NULL NULL NULL # Using where 2 SUBQUERY t3 NULL ALL NULL NULL NULL NULL # NULL SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 14 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 1 HANDLER_READ_RND_NEXT 2 HANDLER_WRITE 17 # 14 locks (2 tables + 5 partitions lock/unlock) INSERT INTO t3 VALUES (3); SELECT * FROM t4 WHERE a = (SELECT a FROM t3); ERROR 21000: Subquery returns more than 1 row EXPLAIN PARTITIONS SELECT * FROM t4 WHERE a = (SELECT a FROM t3); ERROR 21000: Subquery returns more than 1 row EXPLAIN PARTITIONS SELECT * FROM t4 WHERE a = (SELECT a FROM t3 LIMIT 1); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t4 p1 ALL NULL NULL NULL NULL # Using where 2 SUBQUERY t3 NULL ALL NULL NULL NULL NULL # NULL EXPLAIN PARTITIONS SELECT * FROM t4 WHERE a = (SELECT MAX(a) FROM t3); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t4 p3 ALL NULL NULL NULL NULL # Using where 2 SUBQUERY t3 NULL ALL NULL NULL NULL NULL # NULL DROP TABLE t3; DROP TABLE t4; # # Test derived tables like SELECT * FROM (SELECT * FROM ...) # FLUSH STATUS; SELECT * FROM (SELECT * FROM t1 WHERE a IN (0,2,3,13,26)) t3; a b 0 First row, p0 13 Second row, p0 26 Third row, p0 2 First row, p2 3 First row, p3 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 11 HANDLER_READ_RND_NEXT 6 HANDLER_WRITE 22 # 8 locks (1 table + 3 partitions lock/unlock) # 3 read_first, read_key # 11 read_next # 6 read_rnd_next (tmp table) FLUSH STATUS; SELECT * FROM (SELECT * FROM (SELECT * FROM t1 WHERE a IN (0,2,3,13,26)) t3) t4; a b 0 First row, p0 13 Second row, p0 26 Third row, p0 2 First row, p2 3 First row, p3 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 11 HANDLER_READ_RND_NEXT 12 HANDLER_WRITE 27 # 8 locks (1 table + 3 partitions lock/unlock) # 3 read_first, read_key # 11 read_next # 12 read_rnd_next (tmp table) # # Test EXPLAIN SELECT * FROM (SELECT * FROM ...) # FLUSH STATUS; EXPLAIN PARTITIONS SELECT * FROM (SELECT * FROM t1 WHERE a IN (0,2,3,13,26)) t3; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY NULL ALL NULL NULL NULL NULL # NULL 2 DERIVED t1 p0,p2,p3 index PRIMARY b 131 NULL # Using where; Using index SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_WRITE 17 # 8 locks (1 table + 3 partitions lock/unlock) FLUSH STATUS; EXPLAIN PARTITIONS SELECT * FROM (SELECT * FROM (SELECT * FROM t1 WHERE a IN (0,2,3,13,26)) t3) t4; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY NULL ALL NULL NULL NULL NULL # NULL 2 DERIVED NULL ALL NULL NULL NULL NULL # NULL 3 DERIVED t1 p0,p2,p3 index PRIMARY b 131 NULL # Using where; Using index SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_WRITE 17 # 8 locks (1 table + 3 partitions lock/unlock) # # Test SELECT ... UNION SELECT ... # FLUSH STATUS; SELECT * FROM t1 UNION SELECT * FROM t2; a b 0 First row, p0 1 First row, p1 104 No duplicate 104 105 No duplicate 13 Second row, p0 2 First row, p2 26 Third row, p0 3 First row, p3 39 Fourth row, p0 4 First row, p4 5 REPLACE second 52 Fifth row, p0 65 No duplicate, INSERT_DUP_KEY_UPDATE 78 No duplicate 91 No duplicate, INSERT_DUP_KEY_UPDATE SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 56 HANDLER_READ_FIRST 26 HANDLER_READ_KEY 26 HANDLER_READ_NEXT 15 HANDLER_READ_RND_NEXT 32 HANDLER_WRITE 34 # 56 locks (2 tables + 26 partitions lock/unlock) FLUSH STATUS; SELECT * FROM t1 WHERE a IN (0, 1, 13, 4) UNION SELECT * FROM t2; a b 0 First row, p0 13 Second row, p0 1 First row, p1 4 First row, p4 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 36 HANDLER_READ_FIRST 16 HANDLER_READ_KEY 16 HANDLER_READ_NEXT 12 HANDLER_READ_RND_NEXT 21 HANDLER_WRITE 23 # 36 locks (2 tables, 13 + 3 partitions lock/unlock) FLUSH STATUS; SELECT * FROM (SELECT * FROM t1 WHERE a IN (0, 1, 13, 4)) t3 UNION SELECT * FROM t2; a b 0 First row, p0 13 Second row, p0 1 First row, p1 4 First row, p4 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 36 HANDLER_READ_FIRST 16 HANDLER_READ_KEY 16 HANDLER_READ_NEXT 12 HANDLER_READ_RND_NEXT 26 HANDLER_WRITE 27 # 36 locks (2 tables, 13 + 3 partitions lock/unlock) FLUSH STATUS; SELECT * FROM (SELECT * FROM (SELECT * FROM t1 WHERE a IN (0, 1, 13, 4) UNION SELECT * FROM t2) t3) t4; a b 0 First row, p0 13 Second row, p0 1 First row, p1 4 First row, p4 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 36 HANDLER_READ_FIRST 16 HANDLER_READ_KEY 16 HANDLER_READ_NEXT 12 HANDLER_READ_RND_NEXT 31 HANDLER_WRITE 31 # 36 locks (2 tables, 13 + 3 partitions lock/unlock) FLUSH STATUS; SELECT * FROM (SELECT * FROM (SELECT * FROM t1 WHERE a IN (0, 1, 13, 4)) t3 UNION SELECT * FROM t2) t4; a b 0 First row, p0 13 Second row, p0 1 First row, p1 4 First row, p4 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 36 HANDLER_READ_FIRST 16 HANDLER_READ_KEY 16 HANDLER_READ_NEXT 12 HANDLER_READ_RND_NEXT 31 HANDLER_WRITE 31 # 36 locks (2 tables, 13 + 3 partitions lock/unlock) FLUSH STATUS; SELECT * FROM (SELECT * FROM (SELECT * FROM t1 WHERE a IN (0, 1, 13, 4)) t3) t4 UNION SELECT * FROM t2; a b 0 First row, p0 13 Second row, p0 1 First row, p1 4 First row, p4 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 36 HANDLER_READ_FIRST 16 HANDLER_READ_KEY 16 HANDLER_READ_NEXT 12 HANDLER_READ_RND_NEXT 31 HANDLER_WRITE 31 # 36 locks (2 tables, 13 + 3 partitions lock/unlock) FLUSH STATUS; SELECT * FROM (SELECT * FROM (SELECT * FROM t1 WHERE a IN (0, 1, 13, 4)) t3 UNION SELECT * FROM t2 WHERE a = 1) t4; a b 0 First row, p0 13 Second row, p0 1 First row, p1 4 First row, p4 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 12 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 12 HANDLER_READ_RND_NEXT 16 HANDLER_WRITE 30 # 12 locks (2 tables, 3 + 1 partitions lock/unlock) # # Test EXPLAIN SELECT ... UNION SELECT ... # FLUSH STATUS; EXPLAIN PARTITIONS SELECT * FROM t1 UNION SELECT * FROM t2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t1 p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12 index NULL b 131 NULL # Using index 2 UNION t2 p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12 ALL NULL NULL NULL NULL # NULL NULL UNION RESULT NULL ALL NULL NULL NULL NULL # Using temporary SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 56 HANDLER_WRITE 17 # 56 locks FLUSH STATUS; EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a IN (0, 1, 13, 4) UNION SELECT * FROM t2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t1 p0,p1,p4 index PRIMARY b 131 NULL # Using where; Using index 2 UNION t2 p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12 ALL NULL NULL NULL NULL # NULL NULL UNION RESULT NULL ALL NULL NULL NULL NULL # Using temporary SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 36 HANDLER_WRITE 17 # 36 locks (2 tables, 13 + 3 partitions lock/unlock) FLUSH STATUS; EXPLAIN PARTITIONS SELECT * FROM (SELECT * FROM t1 WHERE a IN (0, 1, 13, 4)) t3 UNION SELECT * FROM t2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY NULL ALL NULL NULL NULL NULL # NULL 2 DERIVED t1 p0,p1,p4 index PRIMARY b 131 NULL # Using where; Using index 3 UNION t2 p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12 ALL NULL NULL NULL NULL # NULL NULL UNION RESULT NULL ALL NULL NULL NULL NULL # Using temporary SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 36 HANDLER_WRITE 17 # 36 locks (2 tables, 13 + 3 partitions lock/unlock) FLUSH STATUS; EXPLAIN PARTITIONS SELECT * FROM (SELECT * FROM (SELECT * FROM t1 WHERE a IN (0, 1, 13, 4) UNION SELECT * FROM t2) t3) t4; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY NULL ALL NULL NULL NULL NULL # NULL 2 DERIVED NULL ALL NULL NULL NULL NULL # NULL 3 DERIVED t1 p0,p1,p4 index PRIMARY b 131 NULL # Using where; Using index 4 UNION t2 p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12 ALL NULL NULL NULL NULL # NULL NULL UNION RESULT NULL ALL NULL NULL NULL NULL # Using temporary SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 36 HANDLER_WRITE 17 # 36 locks (2 tables, 13 + 3 partitions lock/unlock) FLUSH STATUS; EXPLAIN PARTITIONS SELECT * FROM (SELECT * FROM (SELECT * FROM t1 WHERE a IN (0, 1, 13, 4)) t3 UNION SELECT * FROM t2) t4; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY NULL ALL NULL NULL NULL NULL # NULL 2 DERIVED NULL ALL NULL NULL NULL NULL # NULL 3 DERIVED t1 p0,p1,p4 index PRIMARY b 131 NULL # Using where; Using index 4 UNION t2 p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12 ALL NULL NULL NULL NULL # NULL NULL UNION RESULT NULL ALL NULL NULL NULL NULL # Using temporary SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 36 HANDLER_WRITE 17 # 36 locks (2 tables, 13 + 3 partitions lock/unlock) FLUSH STATUS; EXPLAIN PARTITIONS SELECT * FROM (SELECT * FROM (SELECT * FROM t1 WHERE a IN (0, 1, 13, 4)) t3) t4 UNION SELECT * FROM t2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY NULL ALL NULL NULL NULL NULL # NULL 2 DERIVED NULL ALL NULL NULL NULL NULL # NULL 3 DERIVED t1 p0,p1,p4 index PRIMARY b 131 NULL # Using where; Using index 4 UNION t2 p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12 ALL NULL NULL NULL NULL # NULL NULL UNION RESULT NULL ALL NULL NULL NULL NULL # Using temporary SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 36 HANDLER_WRITE 17 # 36 locks (2 tables, 13 + 3 partitions lock/unlock) FLUSH STATUS; EXPLAIN PARTITIONS SELECT * FROM (SELECT * FROM (SELECT * FROM t1 WHERE a IN (0, 1, 13, 4)) t3 UNION SELECT * FROM t2 WHERE a = 1) t4; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY NULL ALL NULL NULL NULL NULL # NULL 2 DERIVED NULL ALL NULL NULL NULL NULL # NULL 3 DERIVED t1 p0,p1,p4 index PRIMARY b 131 NULL # Using where; Using index 4 UNION t2 p1 const PRIMARY PRIMARY 4 const # NULL NULL UNION RESULT NULL ALL NULL NULL NULL NULL # Using temporary SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 12 HANDLER_READ_KEY 1 HANDLER_WRITE 17 # 12 locks (2 tables, 3 + 1 partitions lock/unlock) # # Test UPDATE # SELECT * FROM t1 ORDER BY a; a b 0 First row, p0 1 First row, p1 2 First row, p2 3 First row, p3 4 First row, p4 5 REPLACE second 13 Second row, p0 26 Third row, p0 39 Fourth row, p0 52 Fifth row, p0 65 No duplicate, INSERT_DUP_KEY_UPDATE 78 No duplicate 91 No duplicate, INSERT_DUP_KEY_UPDATE 104 No duplicate 104 105 No duplicate # This should be prunable (does not change the partitioning key) FLUSH STATUS; UPDATE t1 SET b = CONCAT(b, ", updated 1") WHERE a IN (13, 26, 39, 52); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 4 HANDLER_UPDATE 4 HANDLER_WRITE 17 # 4 locks (1 table + 1 partition lock/unlock) # 4 read_key # 4 update # # This should not be prunable (only after implementing 'update pruning') # i.e if all changed partitioning field is set to constant values, # set lock_partitions to be a union of read_partition and the matching # partition for the constants. Easy if all partitioning fields are set, # probably needs a second round of prune_partitions() with these fields # set to see if possible to prune locks. FLUSH STATUS; UPDATE t1 SET a = 99, b = CONCAT(b, ", updated 2 -> p8") WHERE a = 13; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_KEY 2 HANDLER_READ_RND 1 HANDLER_WRITE 18 # 28 locks (1 table + 13 partition lock/unlock) # 2 read_key # 1 read_rnd # 1 delete (due to moved to another partition) # 1 write # # This should use ha_update_row instead of ha_write_row + ha_delete_row FLUSH STATUS; UPDATE t1 SET a = 13 + 99, b = CONCAT(b, ", updated 3") WHERE a = 99; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_KEY 2 HANDLER_READ_RND 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 # 28 locks (1 table + 13 partition lock/unlock) # 2 read_key # 1 read_rnd # 1 update # # This should not be prunable (only after implementing # 'optimized update pruning', which will probably never happen, since # it depends on which partitioning type is used (for this only hash is # simple, but range and list is possible, key is very hard) FLUSH STATUS; UPDATE t1 SET a = a + 1, b = CONCAT(b, ", updated 4 -> p9") WHERE a = 112; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_KEY 2 HANDLER_READ_RND 1 HANDLER_WRITE 18 # 28 locks (1 table + 13 partition lock/unlock) # 2 read_key # 1 read_rnd # 1 delete (due to moved to another partition) # 1 write FLUSH STATUS; UPDATE t1 SET b = CONCAT(b, ", same as min(a) + 2 in t2") WHERE a = (SELECT MIN(a) + 2 FROM t2); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 56 HANDLER_READ_FIRST 13 HANDLER_READ_KEY 14 HANDLER_UPDATE 1 HANDLER_WRITE 17 # 56 locks (2 tables, 13 + 13 partitions lock/unlock) FLUSH STATUS; UPDATE t1 SET b = CONCAT(b, ", max(a) in t2: ", (SELECT MAX(a) FROM t2)) WHERE a = 5; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 32 HANDLER_READ_KEY 14 HANDLER_READ_LAST 13 HANDLER_UPDATE 1 HANDLER_WRITE 17 # 32 locks (2 tables, 1 + 13 partitions lock/unlock) # # Test multi table UPDATE # SELECT * FROM t1 ORDER BY a; a b 0 First row, p0 1 First row, p1 2 First row, p2 3 First row, p3, same as min(a) + 2 in t2 4 First row, p4 5 REPLACE second, max(a) in t2: 4 26 Third row, p0, updated 1 39 Fourth row, p0, updated 1 52 Fifth row, p0, updated 1 65 No duplicate, INSERT_DUP_KEY_UPDATE 78 No duplicate 91 No duplicate, INSERT_DUP_KEY_UPDATE 104 No duplicate 104 105 No duplicate 113 Second row, p0, updated 1, updated 2 -> p8, updated 3, updated 4 -> p9 SELECT * FROM t2 ORDER BY a; a b 1 First row, p1 4 First row, p4 FLUSH STATUS; EXPLAIN PARTITIONS UPDATE t1, t2 SET t1.b = CONCAT(t1.b, ", t2.b:", t2.b), t2.b = CONCAT(t2.b, ", t1.b:", t1.b) WHERE t2.b = t1.b and t2.a = 4; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p4 const PRIMARY PRIMARY 4 const # NULL 1 SIMPLE t1 p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12 ref b b 131 const # NULL SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 32 HANDLER_READ_KEY 1 HANDLER_WRITE 17 # 32 locks (2 table, 13 + 1 partitions lock/unlock) FLUSH STATUS; EXPLAIN PARTITIONS UPDATE t1, t2 SET t1.b = CONCAT(t1.b, ", t2.b:", t2.b), t2.b = CONCAT(t2.b, ", t1.b:", t1.b) WHERE t2.b = t1.b and t2.a = 4; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p4 const PRIMARY PRIMARY 4 const # NULL 1 SIMPLE t1 p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12 ref b b 131 const # NULL SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 32 HANDLER_READ_KEY 1 HANDLER_WRITE 17 # 32 locks (2 table, 13 + 1 partitions lock/unlock) FLUSH STATUS; UPDATE t1, t2 SET t1.b = CONCAT(t1.b, ", t2.b:", t2.b), t2.b = CONCAT(t2.b, ", t1.b:", t1.b) WHERE t2.b = t1.b and t2.a = 4; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 32 HANDLER_READ_KEY 15 HANDLER_READ_NEXT 1 HANDLER_READ_RND 1 HANDLER_READ_RND_NEXT 2 HANDLER_UPDATE 2 HANDLER_WRITE 18 # 32 locks (2 table, 13 + 1 partitions lock/unlock) # 15 read_key # 1 read_next, read_rnd # 2 rean_rnd_next # 2 update # # Test of views # FLUSH STATUS; CREATE VIEW v1_25 AS SELECT a, b FROM t1 PARTITION (p2, p5); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_WRITE 17 # No locks! FLUSH STATUS; CREATE VIEW v1_25_check AS SELECT a, b FROM t1 PARTITION (p2, p5) t1_alias WITH CHECK OPTION; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_WRITE 17 # No locks! FLUSH STATUS; CREATE VIEW v1_9 AS SELECT a, b FROM t1 WHERE a = 9; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_WRITE 17 # No locks! FLUSH STATUS; CREATE VIEW v1_9_check AS SELECT a, b FROM t1 WHERE a = 9 WITH CHECK OPTION; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_WRITE 17 # No locks! FLUSH STATUS; CREATE VIEW v1_all AS SELECT a, b FROM t1; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_WRITE 17 # No locks! SELECT TABLE_NAME, CHECK_OPTION, IS_UPDATABLE, VIEW_DEFINITION FROM INFORMATION_SCHEMA.VIEWS WHERE TABLE_SCHEMA = 'test' AND TABLE_NAME LIKE 'v1_%'; TABLE_NAME CHECK_OPTION IS_UPDATABLE VIEW_DEFINITION v1_25 NONE YES select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` PARTITION (`p2`,`p5`) v1_25_check CASCADED YES select `t1_alias`.`a` AS `a`,`t1_alias`.`b` AS `b` from `test`.`t1` PARTITION (`p2`,`p5`) `t1_alias` v1_9 NONE YES select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where (`test`.`t1`.`a` = 9) v1_9_check CASCADED YES select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where (`test`.`t1`.`a` = 9) v1_all NONE YES select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` FLUSH STATUS; INSERT INTO v1_all VALUES (23, "Insert in v1_all"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO v1_25 VALUES (18, "Insert in v1_25"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO v1_25 VALUES (17, "Insert in v1_25 fail"); ERROR HY000: Found a row not matching the given partition set SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_EXTERNAL_LOCK 2 HANDLER_WRITE 17 # 2 locks (1 table, 0 partition lock/unlock) FLUSH STATUS; INSERT IGNORE INTO v1_25 VALUES (17, "Insert ignore in v1_25"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_EXTERNAL_LOCK 2 HANDLER_WRITE 17 # 2 locks (1 table, 0 partition lock/unlock) FLUSH STATUS; INSERT INTO v1_25_check VALUES (31, "Insert in v1_25_check"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO v1_25_check VALUES (30, "Insert in v1_25_check fail"); ERROR HY000: Found a row not matching the given partition set SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_EXTERNAL_LOCK 2 HANDLER_WRITE 17 # 2 locks (1 table, 0 partition lock/unlock) FLUSH STATUS; INSERT IGNORE INTO v1_25_check VALUES (30, "Insert ignore in v1_25_check"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_EXTERNAL_LOCK 2 HANDLER_WRITE 17 # 2 locks (1 table, 0 partition lock/unlock) FLUSH STATUS; INSERT INTO v1_9 VALUES (9, "Insert in v1_9"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO v1_9 VALUES (8, "Insert in v1_9 NO CHECK!"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) SELECT * FROM t1 WHERE a = 8; a b 8 Insert in v1_9 NO CHECK! # DELETE will not find row not in view FLUSH STATUS; DELETE FROM v1_9_check WHERE a = 8; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_WRITE 17 # 0 locks, impossible where! EXPLAIN PARTITIONS DELETE FROM v1_9_check WHERE a = 8; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL # No matching rows after partition pruning EXPLAIN PARTITIONS SELECT * FROM v1_9_check WHERE a = 8; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL # Impossible WHERE SELECT * FROM t1 WHERE a = 8; a b 8 Insert in v1_9 NO CHECK! FLUSH STATUS; INSERT INTO v1_9_check VALUES (10, "Insert in v1_9_check fail"); ERROR HY000: CHECK OPTION failed 'test.v1_9_check' SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_EXTERNAL_LOCK 4 HANDLER_ROLLBACK 1 HANDLER_WRITE 17 # 4 locks (1 table, 1 partition lock/unlock) SELECT * FROM t1 WHERE a = 9; a b 9 Insert in v1_9 FLUSH STATUS; DELETE FROM v1_9_check WHERE a = 9; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_WRITE 17 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; INSERT INTO v1_9_check VALUES (9, "Insert in v1_9_check"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 FLUSH STATUS; SELECT * FROM v1_9; a b 9 Insert in v1_9_check SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_WRITE 17 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; SELECT * FROM v1_25; a b 18 Insert in v1_25 2 First row, p2 31 Insert in v1_25_check 5 REPLACE second, max(a) in t2: 4 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_READ_FIRST 2 HANDLER_READ_KEY 2 HANDLER_READ_NEXT 4 HANDLER_WRITE 17 # 6 locks (1 table, 2 partition lock/unlock) FLUSH STATUS; SELECT * FROM v1_all; a b 0 First row, p0 1 First row, p1 104 No duplicate 104 105 No duplicate 113 Second row, p0, updated 1, updated 2 -> p8, updated 3, updated 4 -> p9 18 Insert in v1_25 2 First row, p2 23 Insert in v1_all 26 Third row, p0, updated 1 3 First row, p3, same as min(a) + 2 in t2 31 Insert in v1_25_check 39 Fourth row, p0, updated 1 4 First row, p4, t2.b:First row, p4 5 REPLACE second, max(a) in t2: 4 52 Fifth row, p0, updated 1 65 No duplicate, INSERT_DUP_KEY_UPDATE 78 No duplicate 8 Insert in v1_9 NO CHECK! 9 Insert in v1_9_check 91 No duplicate, INSERT_DUP_KEY_UPDATE SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_FIRST 13 HANDLER_READ_KEY 13 HANDLER_READ_NEXT 20 HANDLER_WRITE 17 # 28 locks (1 table, 13 partition lock/unlock) DROP VIEW v1_all; DROP VIEW v1_9, v1_9_check; DROP VIEW v1_25, v1_25_check; # # Test CREATE SELECT # FLUSH STATUS; CREATE TABLE t3 SELECT a, b FROM t1 WHERE a IN (0, 1, 13, 113); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 10 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 12 HANDLER_WRITE 20 # 10 locks (2 tables, 3 partitions lock/unlock) SELECT * FROM t3 ORDER BY a; a b 0 First row, p0 1 First row, p1 113 Second row, p0, updated 1, updated 2 -> p8, updated 3, updated 4 -> p9 DROP TABLE t3; FLUSH STATUS; CREATE TABLE t3 SELECT a, b FROM t1 WHERE b LIKE 'First%'; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 30 HANDLER_READ_KEY 13 HANDLER_READ_NEXT 5 HANDLER_WRITE 22 # 30 locks (2 tables, 13 partitions lock/unlock) SELECT * FROM t3 ORDER BY a; a b 0 First row, p0 1 First row, p1 2 First row, p2 3 First row, p3, same as min(a) + 2 in t2 4 First row, p4, t2.b:First row, p4 DROP TABLE t3; # # Test Stored procedures # CREATE PROCEDURE sp_insert(a INT, b CHAR(16)) INSERT INTO test.t1 VALUES (a, b); CREATE PROCEDURE sp_insert_partition(p CHAR(16), a INT, b CHAR(16)) BEGIN SET @str = CONCAT("INSERT INTO test.t1 PARTITION(", p, ") VALUES (?, ?)"); SET @x = a, @y = b; PREPARE stmt FROM @str; EXECUTE stmt USING @x, @y; DEALLOCATE PREPARE stmt; END| CREATE PROCEDURE sp_select_all() SELECT * FROM test.t1; CREATE PROCEDURE sp_select_exact(x INT) SELECT * FROM test.t1 WHERE a = x; CREATE PROCEDURE sp_select_partition(p CHAR(16)) BEGIN SET @str = CONCAT("SELECT * FROM test.t1 PARTITION(", p, ")"); PREPARE stmt FROM @str; EXECUTE stmt; DEALLOCATE PREPARE stmt; END| CREATE PROCEDURE sp_select_range(x INT, y INT) SELECT * FROM test.t1 WHERE a between x and y; FLUSH STATUS; CALL sp_insert(313,"Test313"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_READ_KEY 1 HANDLER_WRITE 18 # 6 locks (proc table, t1 + 1 partition lock/unlock) FLUSH STATUS; CALL sp_insert_partition("p7", 98, "Test98"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_READ_KEY 1 HANDLER_WRITE 18 # 6 locks (proc table, t1 + 1 partition lock/unlock) FLUSH STATUS; CALL sp_insert_partition("p8", 111, "Test111"); ERROR HY000: Found a row not matching the given partition set SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_EXTERNAL_LOCK 2 HANDLER_WRITE 17 # no proc locking since already in proc cache. # 2 locks (1 table, no partitions lock/unlock) FLUSH STATUS; CALL sp_insert_partition("p7,p8", 111, "Test111"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 table, 1 partition lock/unlock) FLUSH STATUS; CALL sp_select_all(); a b 0 First row, p0 1 First row, p1 104 No duplicate 104 105 No duplicate 111 Test111 113 Second row, p0, updated 1, updated 2 -> p8, updated 3, updated 4 -> p9 18 Insert in v1_25 2 First row, p2 23 Insert in v1_all 26 Third row, p0, updated 1 3 First row, p3, same as min(a) + 2 in t2 31 Insert in v1_25_check 313 Test313 39 Fourth row, p0, updated 1 4 First row, p4, t2.b:First row, p4 5 REPLACE second, max(a) in t2: 4 52 Fifth row, p0, updated 1 65 No duplicate, INSERT_DUP_KEY_UPDATE 78 No duplicate 8 Insert in v1_9 NO CHECK! 9 Insert in v1_9_check 91 No duplicate, INSERT_DUP_KEY_UPDATE 98 Test98 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 30 HANDLER_READ_FIRST 13 HANDLER_READ_KEY 14 HANDLER_READ_NEXT 23 HANDLER_WRITE 17 # 30 locks (procs table, t1 + 13 partitions lock/unlock) FLUSH STATUS; CALL sp_select_exact(98); a b 98 Test98 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_READ_KEY 2 HANDLER_WRITE 17 # 6 locks (proc table, t1 + 1 partition lock/unlock) FLUSH STATUS; CALL sp_select_partition("p7"); a b 111 Test111 98 Test98 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 2 HANDLER_READ_NEXT 2 HANDLER_WRITE 17 # 6 locks (proc table, t1 + 1 partition lock/unlock) FLUSH STATUS; CALL sp_select_partition("p8"); a b 8 Insert in v1_9 NO CHECK! SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 1 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 # no proc locking since already in proc cache. # 4 locks (t1 + 1 partition lock/unlock) FLUSH STATUS; CALL sp_select_partition("p7,p8"); a b 111 Test111 8 Insert in v1_9 NO CHECK! 98 Test98 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_READ_FIRST 2 HANDLER_READ_KEY 2 HANDLER_READ_NEXT 3 HANDLER_WRITE 17 # 6 locks (t1 + 2 partitions lock/unlock) FLUSH STATUS; CALL sp_select_range(1,5); a b 1 First row, p1 2 First row, p2 3 First row, p3, same as min(a) + 2 in t2 4 First row, p4, t2.b:First row, p4 5 REPLACE second, max(a) in t2: 4 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 14 HANDLER_READ_KEY 6 HANDLER_READ_NEXT 5 HANDLER_WRITE 17 # 14 locks (proc table, t1 + 5 partitions lock/unlock) DROP PROCEDURE sp_insert; DROP PROCEDURE sp_insert_partition; DROP PROCEDURE sp_select_all; DROP PROCEDURE sp_select_partition; DROP PROCEDURE sp_select_range; DROP PROCEDURE sp_select_exact; # # Test EXPLAIN DELETE # SELECT * FROM t1 ORDER BY a; a b 0 First row, p0 1 First row, p1 2 First row, p2 3 First row, p3, same as min(a) + 2 in t2 4 First row, p4, t2.b:First row, p4 5 REPLACE second, max(a) in t2: 4 8 Insert in v1_9 NO CHECK! 9 Insert in v1_9_check 18 Insert in v1_25 23 Insert in v1_all 26 Third row, p0, updated 1 31 Insert in v1_25_check 39 Fourth row, p0, updated 1 52 Fifth row, p0, updated 1 65 No duplicate, INSERT_DUP_KEY_UPDATE 78 No duplicate 91 No duplicate, INSERT_DUP_KEY_UPDATE 98 Test98 104 No duplicate 104 105 No duplicate 111 Test111 113 Second row, p0, updated 1, updated 2 -> p8, updated 3, updated 4 -> p9 313 Test313 FLUSH STATUS; EXPLAIN PARTITIONS DELETE FROM t1 WHERE a = 105; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p1 range PRIMARY PRIMARY 4 const # Using where SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 17 # 4 locks (1 table + 1 partition lock/unlock) FLUSH STATUS; EXPLAIN PARTITIONS DELETE FROM t1 WHERE b = "No duplicate"; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12 range b b 131 const # Using where SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_WRITE 17 # 28 locks (1 table + 13 partition lock/unlock) FLUSH STATUS; EXPLAIN PARTITIONS DELETE FROM t1 WHERE a = 105; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p1 range PRIMARY PRIMARY 4 const # Using where SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 17 # 4 locks (1 table + 1 partition lock/unlock) FLUSH STATUS; EXPLAIN PARTITIONS DELETE FROM t1 WHERE b = "No duplicate"; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12 range b b 131 const # Using where SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_WRITE 17 # 28 locks (1 table + 13 partition lock/unlock) # # Test DELETE # FLUSH STATUS; DELETE FROM t1 WHERE a = 105; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_WRITE 17 # 4 locks (1 table + 1 partition lock/unlock) # 1 read_key # 1 delete FLUSH STATUS; DELETE FROM t1 WHERE b = "No duplicate"; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_KEY 13 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 # 28 locks (1 table + 13 partition lock/unlock) # 13 read_key # 1 read_next (if more matches after the first match) # 1 delete FLUSH STATUS; DELETE FROM t1 WHERE a = (SELECT a + 90 FROM t2 WHERE a = 1); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 32 HANDLER_READ_KEY 2 HANDLER_WRITE 17 # 32 locks (2 table + 13 + 1 partition lock/unlock) # 2 read_key # 2 read_next (if more matches after the first match) # 1 delete EXPLAIN PARTITIONS DELETE FROM t1 WHERE a = (SELECT a + 90 FROM t2 WHERE a = 1); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t1 p0 range PRIMARY PRIMARY 4 const # Using where 2 SUBQUERY t2 p1 const PRIMARY PRIMARY 4 const # Using index FLUSH STATUS; DELETE FROM t1 PARTITION (p0) WHERE a = (SELECT a + 2 FROM t2 WHERE a = 1); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 1 HANDLER_WRITE 17 # Impossible delete, all partitions pruned away after locking! # 8 locks (2 table + 1 PARTITION(p0) + 1 (a = 1) partition lock/unlock) # 1 read_key EXPLAIN PARTITIONS DELETE FROM t1 PARTITION (p0) WHERE a = (SELECT a + 2 FROM t2 WHERE a = 1); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL # No matching rows after partition pruning 2 SUBQUERY t2 p1 const PRIMARY PRIMARY 4 const # Using index # # Test multi table DELETE # SELECT * FROM t1 ORDER BY a; a b 0 First row, p0 1 First row, p1 2 First row, p2 3 First row, p3, same as min(a) + 2 in t2 4 First row, p4, t2.b:First row, p4 5 REPLACE second, max(a) in t2: 4 8 Insert in v1_9 NO CHECK! 9 Insert in v1_9_check 18 Insert in v1_25 23 Insert in v1_all 26 Third row, p0, updated 1 31 Insert in v1_25_check 39 Fourth row, p0, updated 1 52 Fifth row, p0, updated 1 65 No duplicate, INSERT_DUP_KEY_UPDATE 98 Test98 104 No duplicate 104 111 Test111 113 Second row, p0, updated 1, updated 2 -> p8, updated 3, updated 4 -> p9 313 Test313 SELECT * FROM t2 ORDER BY a; a b 1 First row, p1 4 First row, p4, t1.b:First row, p4 FLUSH STATUS; EXPLAIN PARTITIONS DELETE t1, t2 FROM t1, t2 WHERE t1.a = t2.a AND t1.b = 'First row, p1'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12 ref PRIMARY,b b 131 const # Using where 1 SIMPLE t2 p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12 eq_ref PRIMARY PRIMARY 4 test.t1.a # NULL SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 56 HANDLER_WRITE 17 # 56 locks (2 tables + 26 partitions lock/unlock) FLUSH STATUS; EXPLAIN PARTITIONS DELETE FROM t2, t1 USING t2, t1 WHERE t1.b = t2.b AND t2.a = 4; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p4 const PRIMARY PRIMARY 4 const # NULL 1 SIMPLE t1 p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12 ref b b 131 const # NULL SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 32 HANDLER_READ_KEY 1 HANDLER_WRITE 17 # 32 locks (2 tables , 13 + 1 partition lock/unlock) FLUSH STATUS; DELETE t1, t2 FROM t1, t2 WHERE t1.a = t2.a AND t1.b = 'First row, p1'; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 2 HANDLER_EXTERNAL_LOCK 56 HANDLER_READ_KEY 15 HANDLER_READ_NEXT 1 HANDLER_READ_RND 1 HANDLER_WRITE 17 # 56 locks (2 tables + 26 partitions lock/unlock) # 15 read_key # 1 read_next, read_rnd # 2 delete FLUSH STATUS; DELETE FROM t2, t1 USING t2, t1 WHERE t1.b = t2.b AND t2.a = 4; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 32 HANDLER_READ_KEY 14 HANDLER_WRITE 17 # 32 locks (2 tables , 13 + 1 partition lock/unlock) # 15 read_key # 1 read_next, read_rnd # 2 delete SELECT * FROM t1 ORDER BY a; a b 0 First row, p0 2 First row, p2 3 First row, p3, same as min(a) + 2 in t2 4 First row, p4, t2.b:First row, p4 5 REPLACE second, max(a) in t2: 4 8 Insert in v1_9 NO CHECK! 9 Insert in v1_9_check 18 Insert in v1_25 23 Insert in v1_all 26 Third row, p0, updated 1 31 Insert in v1_25_check 39 Fourth row, p0, updated 1 52 Fifth row, p0, updated 1 65 No duplicate, INSERT_DUP_KEY_UPDATE 98 Test98 104 No duplicate 104 111 Test111 113 Second row, p0, updated 1, updated 2 -> p8, updated 3, updated 4 -> p9 313 Test313 SELECT * FROM t2 ORDER BY a; a b 4 First row, p4, t1.b:First row, p4 # # Test subquery IN expression # FLUSH STATUS; EXPLAIN PARTITIONS SELECT count(*) FROM t1 p WHERE a IN (1, 2, 9); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE p p1,p2,p9 index PRIMARY b 131 NULL 4 Using where; Using index SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_WRITE 17 # 8 locks (1 table, 3 partitions, lock/unlock) FLUSH STATUS; EXPLAIN PARTITIONS SELECT count(*) FROM t1 p WHERE a IN (SELECT a + 1 FROM t2 WHERE a = 4); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE p p5 const PRIMARY PRIMARY 4 const 1 Using index 1 SIMPLE t2 p4 const PRIMARY PRIMARY 4 const 1 Using index SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 32 HANDLER_READ_KEY 2 HANDLER_WRITE 17 # 32 locks (2 table, 13 + 1 partitions, lock/unlock) # # Test triggers # Tables used in triggers cannot be pruned for locks. # Tables with triggers cannot be pruned for locks if # BEFORE INSERT/UPDATE trigger uses any partitioning columns. # CREATE TABLE t3 (old_a int, new_a int, old_b varchar(255), new_b varchar(255), key (new_a, new_b), key(new_b)) PARTITION BY HASH (new_a) PARTITIONS 5; CREATE TRIGGER t1_after_insert AFTER INSERT ON t1 FOR EACH ROW INSERT INTO t3 VALUES (2, NEW.a, NULL, CONCAT("AI: ", NEW.b)); CREATE TRIGGER t1_after_update AFTER UPDATE ON t1 FOR EACH ROW INSERT INTO t3 VALUES (OLD.a, NEW.a, CONCAT("AU: ", OLD.b), CONCAT("AU: ", NEW.b)); FLUSH STATUS; INSERT INTO t1 VALUES (2, "First row, p2") ON DUPLICATE KEY UPDATE b = CONCAT(b, ", duplicate key 2"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 19 # 28 locks (3 tables, 1 + 5 + 5 partition lock/unlock) # (t1 to insert, t3 after insert trigger, t3 after update trigger) SELECT * FROM t1 WHERE a = 2; a b 2 First row, p2, duplicate key 2 FLUSH STATUS; REPLACE INTO t1 VALUES (0, "First row, p0 REPLACED"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 19 # 16 locks (2 tables, 1 + 5 partition lock/unlock) # (t1 to replace, t3 after insert trigger) # Note that since there is no delete trigger, REPLACE cheats by # doing update instead of delete+insert! SELECT * FROM t1 WHERE a = 0; a b 0 First row, p0 REPLACED FLUSH STATUS; EXPLAIN PARTITIONS UPDATE t1 SET b = CONCAT(b, ", UPDATED2") WHERE a = 3; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p3 range PRIMARY PRIMARY 4 const # Using where SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_WRITE 17 # 16 locks (2 tables, 1 + 5 partition lock/unlock) # (t1 to insert, t3 after update trigger) CREATE TRIGGER t1_after_delete AFTER DELETE ON t1 FOR EACH ROW INSERT INTO t3 VALUES (OLD.a, NULL, CONCAT("AD: ", OLD.b), NULL); FLUSH STATUS; REPLACE INTO t1 VALUES (0, "First row, p0 REPLACED2"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_KEY 1 HANDLER_WRITE 21 # 28 locks (3 tables, 1 + 5 + 5 partition lock/unlock) # (t1 to replace, t3 after insert trigger, t3 after delete trigger) # Note that now it does delete+insert instead, due to delete trigger! SELECT * FROM t1 WHERE a = 0; a b 0 First row, p0 REPLACED2 CREATE TRIGGER t1_before_delete BEFORE DELETE ON t1 FOR EACH ROW INSERT INTO t3 VALUES (OLD.a, NULL, CONCAT("BD: ", OLD.b), NULL); FLUSH STATUS; REPLACE INTO t1 VALUES (0, "First row, p0 REPLACED3"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 40 HANDLER_READ_KEY 1 HANDLER_WRITE 22 # 40 locks (4 tables, 1 + 5 + 5 + 5 partition lock/unlock) # (t1 to replace, t3 after insert trigger, t3 before delete trigger, # t3 after delete trigger) SELECT * FROM t1 WHERE a = 0; a b 0 First row, p0 REPLACED3 CREATE TRIGGER t1_before_update BEFORE UPDATE ON t1 FOR EACH ROW INSERT INTO t3 VALUES (OLD.a, NEW.a, CONCAT("BU: ", OLD.b), CONCAT("BU: ", NEW.b)); FLUSH STATUS; INSERT INTO t1 VALUES (2, "First row, p2") ON DUPLICATE KEY UPDATE b = CONCAT(b, ", duplicate key 2"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 64 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 20 # No pruning possible, due to BEFORE UPDATE trigger # 64 locks (4 tables, 13 + 5 + 5 + 5 partitions lock/unlock) # t1, t3 after insert, t3 before update, t3 after update SELECT * FROM t1 WHERE a = 2; a b 2 First row, p2, duplicate key 2, duplicate key 2 FLUSH STATUS; REPLACE INTO t1 VALUES (0, "First row, p0 REPLACED4"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 40 HANDLER_READ_KEY 1 HANDLER_WRITE 22 # 40 locks (4 tables, 1 + 5 + 5 + 5 partition lock/unlock) # t1, t3 after insert, t3 before delete, t3 after delete SELECT * FROM t1 WHERE a = 0; a b 0 First row, p0 REPLACED4 FLUSH STATUS; EXPLAIN PARTITIONS UPDATE t1 SET b = CONCAT(b, ", UPDATED2") WHERE a = 3; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p3 range PRIMARY PRIMARY 4 const # Using where; Using temporary SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 52 HANDLER_WRITE 17 # No pruning possible, due to BEFORE UPDATE trigger # 52 locks (3 tables, 13 + 5 + 5 partition lock/unlock) # t1, before update, after update SELECT * FROM t1 WHERE a = 3; a b 3 First row, p3, same as min(a) + 2 in t2 FLUSH STATUS; UPDATE t1 SET b = CONCAT(b, ", UPDATED2") WHERE a = 3; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 52 HANDLER_READ_KEY 2 HANDLER_READ_RND 1 HANDLER_UPDATE 1 HANDLER_WRITE 19 # 52 locks (3 tables, 13 + 5 + 5 partition lock/unlock) # t1, before update, after update SELECT * FROM t1 WHERE a = 3; a b 3 First row, p3, same as min(a) + 2 in t2, UPDATED2 EXPLAIN PARTITIONS INSERT INTO t1 VALUES (12, "First row, p12"); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used FLUSH STATUS; INSERT INTO t1 VALUES (12, "First row, p12"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_WRITE 19 # 16 locks (2 table, 1 + 5 partition lock/unlock) # t1, t3 after insert trigger CREATE TRIGGER t1_before_insert BEFORE INSERT ON t1 FOR EACH ROW INSERT INTO t3 VALUES (1, NEW.a, NULL, CONCAT("BI: ", NEW.b)); FLUSH STATUS; INSERT INTO t1 VALUES (11, "First row, p11"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 52 HANDLER_WRITE 20 # Nothing can be pruned, due to triggers. # 52 locks (3 tables, 13 + 5 + 5 partition lock/unlock) # t1, t3 before insert, t3 after insert. FLUSH STATUS; EXPLAIN PARTITIONS DELETE FROM t1 WHERE a = 98; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p7 range PRIMARY PRIMARY 4 const # Using where SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_WRITE 17 # 28 locks (3 tables, 1 + 5 + 5 partitions) # t1, t3 before delete trigger, t3 after delete trigger # part 7, part 0-4, part 0-4. SELECT * FROM t1 ORDER BY a; a b 0 First row, p0 REPLACED4 2 First row, p2, duplicate key 2, duplicate key 2 3 First row, p3, same as min(a) + 2 in t2, UPDATED2 4 First row, p4, t2.b:First row, p4 5 REPLACE second, max(a) in t2: 4 8 Insert in v1_9 NO CHECK! 9 Insert in v1_9_check 11 First row, p11 12 First row, p12 18 Insert in v1_25 23 Insert in v1_all 26 Third row, p0, updated 1 31 Insert in v1_25_check 39 Fourth row, p0, updated 1 52 Fifth row, p0, updated 1 65 No duplicate, INSERT_DUP_KEY_UPDATE 98 Test98 104 No duplicate 104 111 Test111 113 Second row, p0, updated 1, updated 2 -> p8, updated 3, updated 4 -> p9 313 Test313 FLUSH STATUS; DELETE FROM t1 WHERE a = 98; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_KEY 1 HANDLER_WRITE 19 # 28 locks (3 tables, 1 + 5 + 5 partitions) # t1, t3 before delete trigger, t3 after delete trigger SELECT * FROM t1 ORDER BY a; a b 0 First row, p0 REPLACED4 2 First row, p2, duplicate key 2, duplicate key 2 3 First row, p3, same as min(a) + 2 in t2, UPDATED2 4 First row, p4, t2.b:First row, p4 5 REPLACE second, max(a) in t2: 4 8 Insert in v1_9 NO CHECK! 9 Insert in v1_9_check 11 First row, p11 12 First row, p12 18 Insert in v1_25 23 Insert in v1_all 26 Third row, p0, updated 1 31 Insert in v1_25_check 39 Fourth row, p0, updated 1 52 Fifth row, p0, updated 1 65 No duplicate, INSERT_DUP_KEY_UPDATE 104 No duplicate 104 111 Test111 113 Second row, p0, updated 1, updated 2 -> p8, updated 3, updated 4 -> p9 313 Test313 SELECT * FROM t2 ORDER BY a; a b 4 First row, p4, t1.b:First row, p4 SELECT * FROM t3 ORDER BY new_a; old_a new_a old_b new_b 0 NULL AD: First row, p0 REPLACED NULL 0 NULL AD: First row, p0 REPLACED2 NULL 0 NULL AD: First row, p0 REPLACED3 NULL 0 NULL BD: First row, p0 REPLACED2 NULL 0 NULL BD: First row, p0 REPLACED3 NULL 1 11 NULL BI: First row, p11 2 0 NULL AI: First row, p0 REPLACED 2 0 NULL AI: First row, p0 REPLACED2 2 0 NULL AI: First row, p0 REPLACED3 2 0 NULL AI: First row, p0 REPLACED4 2 11 NULL AI: First row, p11 2 12 NULL AI: First row, p12 2 2 AU: First row, p2 AU: First row, p2, duplicate key 2 2 2 AU: First row, p2, duplicate key 2 AU: First row, p2, duplicate key 2, duplicate key 2 2 2 BU: First row, p2, duplicate key 2 BU: First row, p2, duplicate key 2, duplicate key 2 3 3 AU: First row, p3, same as min(a) + 2 in t2 AU: First row, p3, same as min(a) + 2 in t2, UPDATED2 3 3 BU: First row, p3, same as min(a) + 2 in t2 BU: First row, p3, same as min(a) + 2 in t2, UPDATED2 98 NULL AD: Test98 NULL 98 NULL BD: Test98 NULL TRUNCATE TABLE t1; DROP TRIGGER t1_before_insert; DROP TRIGGER t1_before_update; DROP TRIGGER t1_before_delete; DROP TRIGGER t1_after_insert; DROP TRIGGER t1_after_update; DROP TRIGGER t1_after_delete; # # Test BEFORE INSERT TRIGGER depending on partitioning column # CREATE TRIGGER t1_before_insert BEFORE INSERT ON t1 FOR EACH ROW SET NEW.b = CONCAT("b: ", NEW.b, " a: ", NEW.a); FLUSH STATUS; INSERT INTO t1 VALUES (0, "first row, p0"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_WRITE 18 # 28 locks (1 tables, 13 partitions lock/unlock) FLUSH STATUS; INSERT INTO t1 VALUES (0, "Second row, p0") ON DUPLICATE KEY UPDATE b = CONCAT(b, ", duplicate key"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 28 locks (1 tables, 13 partitions lock/unlock) FLUSH STATUS; UPDATE t1 SET b = CONCAT(b, ", Updated") WHERE a = 0; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 # 4 locks (1 tables, 1 partitions lock/unlock) FLUSH STATUS; UPDATE t1 SET a = 1, b = CONCAT(b, ", a was 0") WHERE a = 0; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_KEY 2 HANDLER_READ_RND 1 HANDLER_WRITE 18 # Updating partitioning column, no lock pruning # 28 locks (1 tables, 13 partitions lock/unlock) # # Test BEFORE INSERT TRIGGER not depending on partitioning column # DROP TRIGGER t1_before_insert; CREATE TRIGGER t1_before_insert BEFORE INSERT ON t1 FOR EACH ROW SET NEW.b = CONCAT("b: ", NEW.b); FLUSH STATUS; INSERT INTO t1 VALUES (0, "first row, p0"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 tables, 1 partitions lock/unlock) FLUSH STATUS; INSERT INTO t1 VALUES (0, "Second row, p0") ON DUPLICATE KEY UPDATE b = CONCAT(b, ", duplicate key"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 tables, 1 partitions lock/unlock) FLUSH STATUS; UPDATE t1 SET b = CONCAT(b, ", Updated") WHERE a = 0; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 # 4 locks (1 tables, 1 partitions lock/unlock) FLUSH STATUS; UPDATE t1 SET a = 2, b = CONCAT(b, ", a was 0") WHERE a = 0; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_KEY 2 HANDLER_READ_RND 1 HANDLER_WRITE 18 # Updating partitioning column, no lock pruning # 28 locks (1 tables, 13 partitions lock/unlock) # # Test BEFORE UPDATE TRIGGER OLD depending on partitioning column. # Note that it does not update any partitioning column. # CREATE TRIGGER t1_before_update BEFORE UPDATE ON t1 FOR EACH ROW SET NEW.b = CONCAT("old a: ", OLD.a, " new b: ", NEW.b); FLUSH STATUS; INSERT INTO t1 VALUES (0, "1st p0"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 tables, 1 partitions lock/unlock) FLUSH STATUS; INSERT INTO t1 VALUES (0, "2nd p0") ON DUPLICATE KEY UPDATE b = CONCAT(b, ", dup key"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 tables, 1 partitions lock/unlock) FLUSH STATUS; UPDATE t1 SET b = CONCAT(b, ", Updated") WHERE a = 0; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 # Lock pruning possible! # 4 locks (1 tables, 1 partitions lock/unlock) FLUSH STATUS; UPDATE t1 SET a = 3, b = CONCAT(b, ", a was 0") WHERE a = 0; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_KEY 2 HANDLER_READ_RND 1 HANDLER_WRITE 18 # Updating partitioning column, no lock pruning # 28 locks (1 tables, 13 partitions lock/unlock) # # Test BEFORE UPDATE TRIGGER NEW depending on partitioning column. # Note that it does not update any partitioning column. # DROP TRIGGER t1_before_update; CREATE TRIGGER t1_before_update BEFORE UPDATE ON t1 FOR EACH ROW SET NEW.b = CONCAT("new a: ", NEW.a, " new b: ", NEW.b); FLUSH STATUS; INSERT INTO t1 VALUES (0, "1st p0"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 tables, 1 partitions lock/unlock) FLUSH STATUS; INSERT INTO t1 VALUES (0, "2nd p0") ON DUPLICATE KEY UPDATE b = CONCAT(b, ", dup key"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 28 locks (1 tables, 13 partitions lock/unlock) FLUSH STATUS; UPDATE t1 SET b = CONCAT(b, ", Updated") WHERE a = 0; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_KEY 2 HANDLER_READ_RND 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 # 28 locks (1 tables, 13 partitions lock/unlock) FLUSH STATUS; UPDATE t1 SET a = 4, b = CONCAT(b, ", a was 0") WHERE a = 0; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_KEY 2 HANDLER_READ_RND 1 HANDLER_WRITE 18 # Updating partitioning column, no lock pruning # 28 locks (1 tables, 13 partitions lock/unlock) # # Test BEFORE UPDATE TRIGGER not depending on partitioning column # DROP TRIGGER t1_before_update; CREATE TRIGGER t1_before_update BEFORE UPDATE ON t1 FOR EACH ROW SET NEW.b = CONCAT("new b: ", NEW.b); FLUSH STATUS; INSERT INTO t1 VALUES (0, "1st p0"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 18 # 4 locks (1 tables, 1 partitions lock/unlock) FLUSH STATUS; INSERT INTO t1 VALUES (0, "2nd p0") ON DUPLICATE KEY UPDATE b = CONCAT(b, ", dup key"); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 18 # 4 locks (1 tables, 1 partitions lock/unlock) FLUSH STATUS; UPDATE t1 SET b = CONCAT(b, ", Updated") WHERE a = 0; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_KEY 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 # 4 locks (1 tables, 1 partitions lock/unlock) FLUSH STATUS; UPDATE t1 SET a = 5, b = CONCAT(b, ", a was 0") WHERE a = 0; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 28 HANDLER_READ_KEY 2 HANDLER_READ_RND 1 HANDLER_WRITE 18 # Updating partitioning column, no lock pruning # 28 locks (1 tables, 13 partitions lock/unlock) SELECT * FROM t1 ORDER BY a; a b 1 b: first row, p0 a: 0, duplicate key, Updated, a was 0 2 b: first row, p0, duplicate key, Updated, a was 0 3 old a: 0 new b: old a: 0 new b: old a: 0 new b: b: 1st p0, dup key, Updated, a was 0 4 new a: 4 new b: new a: 0 new b: new a: 0 new b: b: 1st p0, dup key, Updated, a was 0 5 new b: new b: new b: b: 1st p0, dup key, Updated, a was 0 DROP TABLE t1, t2, t3; # # Test of BEFORE UPDATE triggers and multi UPDATE # CREATE TABLE t1 (a int, b varchar(128), KEY (b)) ENGINE = InnoDB PARTITION BY HASH (a) PARTITIONS 13; CREATE TABLE t2 (a int PRIMARY KEY, b varchar(128)) ENGINE = InnoDB PARTITION BY HASH (a) PARTITIONS 13; INSERT INTO t1 VALUES (1, "MultiUpdate1"); INSERT INTO t1 VALUES (2, "MultiUpdate2"); INSERT INTO t2 VALUES (1, "MultiUpdate1"); INSERT INTO t2 VALUES (2, "MultiUpdate2"); CREATE TRIGGER t1_before_update BEFORE UPDATE ON t1 FOR EACH ROW SET NEW.b = CONCAT("new1 b: ", NEW.b); CREATE TRIGGER t2_before_update BEFORE UPDATE ON t2 FOR EACH ROW SET NEW.b = CONCAT("new2 a: ", NEW.a, " new2 b: ", NEW.b); FLUSH STATUS; EXPLAIN EXTENDED UPDATE t1, t2 SET t1.b = CONCAT(t1.b, ",(1) t2.b:", t2.b), t2.b = CONCAT(t2.b, ",(1) t1.b:", t1.b) WHERE t2.b = t1.b and t1.a = 1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL b NULL NULL NULL # 100.00 Using where 1 SIMPLE t2 ALL NULL NULL NULL NULL # 100.00 Using where; Using join buffer (Block Nested Loop) SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 32 HANDLER_WRITE 17 # 32 locks (2 table, 13 + 1 partitions lock/unlock) FLUSH STATUS; EXPLAIN PARTITIONS UPDATE t1, t2 SET t1.b = CONCAT(t1.b, ",(1) t2.b:", t2.b), t2.b = CONCAT(t2.b, ",(1) t1.b:", t1.b) WHERE t2.b = t1.b and t1.a = 1; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p1 ALL b NULL NULL NULL # Using where 1 SIMPLE t2 p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12 ALL NULL NULL NULL NULL # Using where; Using join buffer (Block Nested Loop) SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 32 HANDLER_WRITE 17 # 32 locks (2 table, 13 + 1 partitions lock/unlock) FLUSH STATUS; UPDATE t1, t2 SET t1.b = CONCAT(t1.b, ",(1) t2.b:", t2.b), t2.b = CONCAT(t2.b, ",(1) t1.b:", t1.b) WHERE t2.b = t1.b and t1.a = 1; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 32 HANDLER_READ_FIRST 14 HANDLER_READ_KEY 16 HANDLER_READ_RND 2 HANDLER_READ_RND_NEXT 21 HANDLER_UPDATE 2 HANDLER_WRITE 19 # 32 locks (2 table, 13 + 1 partitions lock/unlock) # 14 read_first # 16 read_key # 2 read_rnd # 21 rean_rnd_next # 2 update FLUSH STATUS; EXPLAIN EXTENDED UPDATE t1, t2 SET t1.b = CONCAT(t1.b, ",(2) t2.b:", t2.b), t2.b = CONCAT(t2.b, ",(2) t1.b:", t1.b) WHERE t1.b = t2.b and t2.a = 2; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 const PRIMARY PRIMARY 4 const # 100.00 NULL 1 SIMPLE t1 ref b b 131 const # 100.00 NULL SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 56 HANDLER_READ_KEY 1 HANDLER_WRITE 17 # Trigger touches partitioning column, unable to prune locks # 56 locks (2 tables + 2 * 13 partitions lock/unlock) FLUSH STATUS; EXPLAIN PARTITIONS UPDATE t1, t2 SET t1.b = CONCAT(t1.b, ",(2) t2.b:", t2.b), t2.b = CONCAT(t2.b, ",(2) t1.b:", t1.b) WHERE t1.b = t2.b and t2.a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p2 const PRIMARY PRIMARY 4 const # NULL 1 SIMPLE t1 p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12 ref b b 131 const # NULL SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 56 HANDLER_READ_KEY 1 HANDLER_WRITE 17 # Trigger touches partitioning column, unable to prune locks # 56 locks (2 tables + 2 * 13 partitions lock/unlock) FLUSH STATUS; UPDATE t1, t2 SET t1.b = CONCAT(t1.b, ",(2) t2.b:", t2.b), t2.b = CONCAT(t2.b, ",(2) t1.b:", t1.b) WHERE t1.b = t2.b and t2.a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 56 HANDLER_READ_KEY 15 HANDLER_READ_NEXT 1 HANDLER_READ_RND 1 HANDLER_READ_RND_NEXT 2 HANDLER_UPDATE 2 HANDLER_WRITE 18 # Due to the BEFORE UPDATE trigger on t2 that looks at 'a', # no locks can be pruned. # 56 locks (2 table, 2 * 13 partitions lock/unlock) # 15 read_key # 1 read_next, read_rnd # 2 read_rnd_next # 2 update SELECT * FROM t1 ORDER BY a; a b 1 new1 b: MultiUpdate1,(1) t2.b:MultiUpdate1 2 new1 b: MultiUpdate2,(2) t2.b:MultiUpdate2 SELECT * FROM t2 ORDER BY a; a b 1 new2 a: 1 new2 b: MultiUpdate1,(1) t1.b:MultiUpdate1 2 new2 a: 2 new2 b: MultiUpdate2,(2) t1.b:MultiUpdate2 DROP TABLE t1, t2; # # Test constant propagation in WHERE clause # (Currently no propagation is done before locking). CREATE TABLE t1 (a int, b varchar(128), KEY (b)) ENGINE = InnoDB PARTITION BY RANGE (a) (PARTITION pNeg VALUES LESS THAN (0), PARTITION p0 VALUES LESS THAN (1), PARTITION p1 VALUES LESS THAN (2), PARTITION p2 VALUES LESS THAN (3), PARTITION p3 VALUES LESS THAN (4), PARTITION pMax VALUES LESS THAN MAXVALUE); CREATE TABLE t2 (a int PRIMARY KEY, b varchar(128)) ENGINE = InnoDB PARTITION BY RANGE (a) (PARTITION pNeg VALUES LESS THAN (0), PARTITION p0 VALUES LESS THAN (1), PARTITION p1 VALUES LESS THAN (2), PARTITION p2 VALUES LESS THAN (3), PARTITION p3 VALUES LESS THAN (4), PARTITION pMax VALUES LESS THAN MAXVALUE); INSERT INTO t1 VALUES (1, "Const1"); INSERT INTO t2 VALUES (1, "Const1"); INSERT INTO t1 VALUES (2, "Const2"); INSERT INTO t2 VALUES (2, "Const2"); INSERT INTO t1 VALUES (3, "Const3"); INSERT INTO t2 VALUES (3, "Const3"); # Test simple '=' propagation FLUSH STATUS; SELECT * FROM t1, t2 WHERE t1.a = t2.a AND t2.a = 1; a b a b 1 Const1 1 Const1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 18 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 2 HANDLER_READ_RND_NEXT 2 HANDLER_WRITE 17 # 18 locks (2 tables, 6 + 1 partitions lock/unlock) FLUSH STATUS; SELECT * FROM t1, t2 WHERE t1.a = t2.a AND t1.a = 1; a b a b 1 Const1 1 Const1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 18 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 2 HANDLER_READ_RND_NEXT 2 HANDLER_WRITE 17 # 18 locks (2 tables, 1 + 6 partitions lock/unlock) # Test OR propagation FLUSH STATUS; SELECT * FROM t1, t2 WHERE t1.a = t2.a AND (t2.a = 1 OR t2.a = 2); a b a b 1 Const1 1 Const1 2 Const2 2 Const2 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 20 HANDLER_READ_FIRST 2 HANDLER_READ_KEY 4 HANDLER_READ_RND_NEXT 4 HANDLER_WRITE 17 # 20 locks (2 tables, 6 + 2 partitions lock/unlock) # But it will be scanned pruned! EXPLAIN PARTITIONS SELECT * FROM t1, t2 WHERE t1.a = t2.a AND (t1.a = 1 OR t1.a = 2); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p1,p2 ALL NULL NULL NULL NULL # Using where 1 SIMPLE t2 p1,p2 eq_ref PRIMARY PRIMARY 4 test.t1.a # NULL # Test closed range propagation FLUSH STATUS; SELECT * FROM t1, t2 WHERE t1.a = t2.a AND t1.a >= 1 AND t1.a <=3; a b a b 1 Const1 1 Const1 2 Const2 2 Const2 3 Const3 3 Const3 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 22 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 6 HANDLER_READ_NEXT 3 HANDLER_READ_RND_NEXT 6 HANDLER_WRITE 17 # 22 locks (2 tables, 6 + 3 partitions lock/unlock) # But it will be scanned pruned! EXPLAIN PARTITIONS SELECT * FROM t1, t2 WHERE t1.a = t2.a AND t1.a >= 1 AND t1.a <=3; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p1,p2,p3 range PRIMARY PRIMARY 4 NULL # Using where 1 SIMPLE t1 p1,p2,p3 ALL NULL NULL NULL NULL # Using where; Using join buffer (Block Nested Loop) # Test open range propagation FLUSH STATUS; SELECT * FROM t1, t2 WHERE t1.a = t2.a AND t2.a >= 1; a b a b 1 Const1 1 Const1 2 Const2 2 Const2 3 Const3 3 Const3 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 24 HANDLER_READ_FIRST 4 HANDLER_READ_KEY 7 HANDLER_READ_RND_NEXT 7 HANDLER_WRITE 17 # 24 locks (2 tables, 6 + 4 partitions lock/unlock) # But is scanned pruned! EXPLAIN PARTITIONS SELECT * FROM t1, t2 WHERE t1.a = t2.a AND t2.a >= 1; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p1,p2,p3,pMax ALL NULL NULL NULL NULL # Using where 1 SIMPLE t2 p1,p2,p3,pMax eq_ref PRIMARY PRIMARY 4 test.t1.a # NULL FLUSH STATUS; SELECT * FROM t1, t2 WHERE t1.a = t2.a AND t2.a <= 1; a b a b 1 Const1 1 Const1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 22 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 4 HANDLER_READ_RND_NEXT 4 HANDLER_WRITE 17 # 22 locks (2 tables, 6 + 3 partitions lock/unlock) # But is scanned pruned! EXPLAIN PARTITIONS SELECT * FROM t1, t2 WHERE t1.a = t2.a AND t2.a <= 1; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 pNeg,p0,p1 ALL NULL NULL NULL NULL # Using where 1 SIMPLE t2 pNeg,p0,p1 eq_ref PRIMARY PRIMARY 4 test.t1.a # NULL # Test IN propagation FLUSH STATUS; SELECT * FROM t1, t2 WHERE t1.a = t2.a and t2.a IN (1, 3); a b a b 1 Const1 1 Const1 3 Const3 3 Const3 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 20 HANDLER_READ_FIRST 2 HANDLER_READ_KEY 4 HANDLER_READ_RND_NEXT 4 HANDLER_WRITE 17 # 20 locks (2 tables, 6 + 2 partitions lock/unlock) # But is scanned pruned! EXPLAIN PARTITIONS SELECT * FROM t1, t2 WHERE t1.a = t2.a AND t1.a IN (1, 3); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p1,p3 ALL NULL NULL NULL NULL # Using where 1 SIMPLE t2 p1,p3 eq_ref PRIMARY PRIMARY 4 test.t1.a # NULL # Same for UPDATE FLUSH STATUS; UPDATE t1, t2 SET t1.b = CONCAT(t1.b, ", t2.b:", t2.b) WHERE t1.a = t2.a and t2.a IN (2, 3); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 20 HANDLER_READ_FIRST 2 HANDLER_READ_KEY 6 HANDLER_READ_RND 2 HANDLER_READ_RND_NEXT 7 HANDLER_UPDATE 2 HANDLER_WRITE 19 # 20 locks (2 tables, 6 + 2 partitions lock/unlock) # But is scanned pruned! EXPLAIN PARTITIONS UPDATE t1, t2 SET t1.b = CONCAT(t1.b, ", t2.b:", t2.b) WHERE t1.a = t2.a and t2.a IN (2, 3); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p2,p3 ALL NULL NULL NULL NULL # Using where 1 SIMPLE t2 p2,p3 eq_ref PRIMARY PRIMARY 4 test.t1.a # NULL FLUSH STATUS; UPDATE t1, t2 SET t1.b = CONCAT(t1.b, ", t2.b:", t2.b), t2.b = CONCAT(t2.b, ", t1.b:", t1.b) WHERE t1.a = t2.a and t2.a = 1; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 18 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 3 HANDLER_READ_RND 1 HANDLER_READ_RND_NEXT 4 HANDLER_UPDATE 2 HANDLER_WRITE 18 # 18 locks (2 tables, 6 + 1 partitions lock/unlock) FLUSH STATUS; UPDATE t1, t2 SET t1.b = CONCAT(t1.b, ", t2.b:", t2.b), t2.b = CONCAT(t2.b, ", t1.b:", t1.b) WHERE t1.a = t2.a and t1.a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 18 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 3 HANDLER_READ_RND 1 HANDLER_READ_RND_NEXT 4 HANDLER_UPDATE 2 HANDLER_WRITE 18 # 18 locks (2 tables, 1 + 6 partitions lock/unlock) SELECT * FROM t1 ORDER BY a; a b 1 Const1, t2.b:Const1 2 Const2, t2.b:Const2, t2.b:Const2 3 Const3, t2.b:Const3 SELECT * FROM t2 ORDER BY a; a b 1 Const1, t1.b:Const1 2 Const2, t1.b:Const2, t2.b:Const2 3 Const3 # Same for DELETE FLUSH STATUS; DELETE t1 FROM t1, t2 WHERE t1.a = t2.a AND t2.a IN (1, 9); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 20 HANDLER_READ_FIRST 2 HANDLER_READ_KEY 3 HANDLER_READ_RND_NEXT 3 HANDLER_WRITE 17 # 20 locks (2 tables, 6 + 2 partitions lock/unlock) # But is scanned pruned! EXPLAIN PARTITIONS DELETE t1 FROM t1, t2 WHERE t1.a = t2.a AND t2.a IN (1, 9); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p1,pMax ALL NULL NULL NULL NULL # Using where 1 SIMPLE t2 p1,pMax eq_ref PRIMARY PRIMARY 4 test.t1.a # Using index SELECT * FROM t1 ORDER BY a; a b 2 Const2, t2.b:Const2, t2.b:Const2 3 Const3, t2.b:Const3 FLUSH STATUS; DELETE t1 FROM t1, t2 WHERE t1.a = t2.a and t2.a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 18 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 2 HANDLER_READ_RND_NEXT 2 HANDLER_WRITE 17 # 18 locks (2 tables, 6 + 1 partitions lock/unlock) FLUSH STATUS; DELETE t1 FROM t1, t2 WHERE t1.a = t2.a and t1.a = 1; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 18 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 2 HANDLER_READ_RND_NEXT 1 HANDLER_WRITE 17 # 18 locks (2 tables, 1 + 6 partitions lock/unlock) SELECT * FROM t1 ORDER BY a; a b 3 Const3, t2.b:Const3 SELECT * FROM t2 ORDER BY a; a b 1 Const1, t1.b:Const1 2 Const2, t1.b:Const2, t2.b:Const2 3 Const3 FLUSH STATUS; DELETE t1, t2 FROM t1, t2 WHERE t1.a = t2.a and t2.a = 3; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 2 HANDLER_EXTERNAL_LOCK 18 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 3 HANDLER_READ_RND 1 HANDLER_READ_RND_NEXT 2 HANDLER_WRITE 17 # 18 locks (2 tables, 6 + 1 partitions lock/unlock) SELECT * FROM t1 ORDER BY a; a b SELECT * FROM t2 ORDER BY a; a b 1 Const1, t1.b:Const1 2 Const2, t1.b:Const2, t2.b:Const2 DROP TABLE t1, t2; # # DO is not supported by WL#4443 !!! # Test of DO (eg. SELECT without returning values) # CREATE TABLE t1 (a INT, b VARCHAR(66)) PARTITION BY HASH (a) PARTITIONS 3; INSERT INTO t1 VALUES (1, "One"), (2, "Two"), (3, "Three"), (4, "Four"), (5, "Five"), (6, "Six"), (0, "Zero"); DO (SELECT a FROM t1); Warnings: Error 1242 Subquery returns more than 1 row FLUSH STATUS; DO (SELECT @x:= b FROM t1 WHERE a = 5); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 1 HANDLER_READ_RND_NEXT 3 HANDLER_WRITE 17 # 8 locks (1 table + 3 partitions lock/unlock) SELECT @x; @x Five FLUSH STATUS; DO (SELECT @x:= b FROM t1 WHERE a = 5 or a = 1 ORDER BY b LIMIT 1); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 2 HANDLER_READ_KEY 2 HANDLER_READ_RND_NEXT 6 HANDLER_WRITE 17 # 8 locks (1 table + 3 partitions lock/unlock) SELECT @x; @x Five # # SET is not supported by WL#4443 !!! # Test of SET (eg. SELECT only setting an internal variable from # the returning value) # FLUSH STATUS; SET @x = (SELECT a FROM t1 WHERE a = 5); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 1 HANDLER_READ_RND_NEXT 3 HANDLER_WRITE 17 # 8 locks (1 table + 3 partitions lock/unlock) SELECT @x; @x 5 FLUSH STATUS; SET @y = (SELECT @x:= b FROM t1 WHERE a = 5); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 1 HANDLER_READ_RND_NEXT 3 HANDLER_WRITE 17 # 8 locks (1 table + 3 partitions lock/unlock) SELECT @x, @y; @x @y Five Five FLUSH STATUS; SET @y = (SELECT @x:= b FROM t1 WHERE a = 5 or a = 1 ORDER BY b LIMIT 1); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 2 HANDLER_READ_KEY 2 HANDLER_READ_RND_NEXT 6 HANDLER_WRITE 17 # 8 locks (1 table + 3 partitions lock/unlock) SELECT @x, @y; @x @y Five Five # # LOAD DATA is not supported by WL#4443 !!! # FLUSH STATUS; SELECT * FROM t1 WHERE a IN (1, 4) INTO OUTFILE 'MYSQLTEST_VARDIR/tmp/t1.part1'; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 1 HANDLER_READ_RND_NEXT 3 HANDLER_WRITE 17 # 4 locks (1 table + 1 partitions lock/unlock) DELETE FROM t1 WHERE a IN (1, 4); SELECT * FROM t1 ORDER BY a, b; a b 0 Zero 2 Two 3 Three 5 Five 6 Six FLUSH STATUS; LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/t1.part1' INTO TABLE t1; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_WRITE 19 # 8 locks (1 table + 3 partitions lock/unlock) SELECT * FROM t1 ORDER BY a, b; a b 0 Zero 1 One 2 Two 3 Three 4 Four 5 Five 6 Six DELETE FROM t1 WHERE a IN (1, 4); SELECT * FROM t1 ORDER BY a, b; a b 0 Zero 2 Two 3 Three 5 Five 6 Six # It is possible to avoid locking with explicit partitioning selection! FLUSH STATUS; LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/t1.part1' INTO TABLE t1 PARTITION(p1); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_WRITE 19 # 4 locks (1 table + 1 partitions lock/unlock) SELECT * FROM t1 ORDER BY a, b; a b 0 Zero 1 One 2 Two 3 Three 4 Four 5 Five 6 Six DROP TABLE t1; # # Test EXCHANGE PARTITION to only lock exchanged partition # CREATE TABLE t1 (a INT, b VARCHAR(44)); CREATE TABLE t2 (a INT, b VARCHAR(44)) PARTITION BY HASH (a) PARTITIONS 3; INSERT INTO t1 VALUES (10, "Ten"), (13, "Thirteen"), (16, "Sixteen"); INSERT INTO t2 VALUES (0, "Zero"), (1, "One"), (2, "Two"), (3, "Three"), (4, "Four"), (5, "Five"), (6, "Six"), (7, "Seven"), (8, "Eight"); FLUSH STATUS; ALTER TABLE t2 EXCHANGE PARTITION p1 WITH TABLE t1; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 6 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 1 HANDLER_READ_RND_NEXT 4 HANDLER_WRITE 17 # 6 locks (2 table + 1 partition lock/unlock) SELECT * FROM t1 ORDER BY a; a b 1 One 4 Four 7 Seven SELECT * FROM t2 ORDER BY a; a b 0 Zero 2 Two 3 Three 5 Five 6 Six 8 Eight 10 Ten 13 Thirteen 16 Sixteen DROP TABLE t1, t2; # # Prepared statement # CREATE TABLE t1 (N int, M tinyint) PARTITION BY HASH (N) PARTITIONS 3; INSERT INTO t1 VALUES (1,0),(1,0),(2,0),(2,0),(3,0); PREPARE stmt FROM 'UPDATE t1 AS P1 INNER JOIN (SELECT N FROM t1 GROUP BY N HAVING COUNT(M) > 1) AS P2 ON P1.N = P2.N SET P1.M = 2'; FLUSH STATUS; EXECUTE stmt; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_FIRST 6 HANDLER_READ_KEY 16 HANDLER_READ_NEXT 4 HANDLER_READ_RND 2 HANDLER_READ_RND_NEXT 20 HANDLER_UPDATE 6 HANDLER_WRITE 22 # 16 locks (2 table + 6 partition lock/unlock) SELECT * FROM t1 ORDER BY N, M; N M 1 2 1 2 2 2 2 2 3 0 DEALLOCATE PREPARE stmt; PREPARE stmt FROM 'SELECT * FROM t1 WHERE N = 2'; FLUSH STATUS; EXECUTE stmt; N M 2 2 2 2 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 4 HANDLER_READ_FIRST 1 HANDLER_READ_KEY 1 HANDLER_READ_RND_NEXT 3 HANDLER_WRITE 17 # 4 locks (1 table + 1 partition lock/unlock) DROP TABLE t1; # Check if we can infer from condition on partition fields that # no records will match. CREATE TABLE t1 ( a int NOT NULL) PARTITION BY HASH(a) PARTITIONS 2; INSERT INTO t1 VALUES (1),(2),(3); FLUSH STATUS; EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a=5 AND a=6; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL # Impossible WHERE SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_EXTERNAL_LOCK 2 HANDLER_WRITE 17 # 2 locks (1 table + 0 partition lock/unlock) FLUSH STATUS; SELECT * FROM t1 WHERE a=5 AND a=6; a SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_EXTERNAL_LOCK 2 HANDLER_WRITE 17 # 2 locks (1 table + 0 partition lock/unlock) DROP TABLE t1; # # Test of subqueries in INSERT # CREATE TABLE t1 (a INT, b VARCHAR(64)); CREATE TABLE t2 (a INT, b VARCHAR(64)) PARTITION BY HASH (a) PARTITIONS 3; INSERT INTO t1 VALUES (1, "test 1"); INSERT INTO t2 VALUES (SELECT * FROM t1); ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'SELECT * FROM t1)' at line 1 FLUSH STATUS; INSERT INTO t2 VALUES ((SELECT a FROM t1), (SELECT b FROM t1)); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 12 HANDLER_READ_FIRST 2 HANDLER_READ_KEY 2 HANDLER_READ_RND_NEXT 4 HANDLER_WRITE 18 # 12 locks (3 tables + 3 partitions) x lock/unlock # I.e. No lock pruning possible FLUSH STATUS; INSERT INTO t2 VALUES (1 + (SELECT a FROM t1), CONCAT("subq: ", (SELECT b FROM t1))); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 12 HANDLER_READ_FIRST 2 HANDLER_READ_KEY 2 HANDLER_READ_RND_NEXT 4 HANDLER_WRITE 18 # 12 locks (3 tables + 3 partitions) x lock/unlock # I.e. No lock pruning possible SELECT * FROM t2; a b 1 test 1 2 subq: test 1 DROP TABLE t1, t2; CREATE TABLE t1 (a INT, b INT) PARTITION BY HASH (a) PARTITIONS 3; CREATE TABLE t2 (a INT, b INT) PARTITION BY HASH (a) PARTITIONS 3; INSERT INTO t1 VALUES (1, 1), (2, 0), (4, -1), (5, 2), (7, -3), (8, -9), (10, 5), (11, 9); FLUSH STATUS; INSERT INTO t2 VALUES ((SELECT max(a) FROM t1), (SELECT min(a) FROM t1)); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 24 HANDLER_READ_FIRST 6 HANDLER_READ_KEY 6 HANDLER_READ_RND_NEXT 22 HANDLER_WRITE 18 # 24 locks (3 tables + 3 x 3 partitions) x lock/unlock # I.e. No lock pruning possible FLUSH STATUS; EXPLAIN PARTITIONS INSERT INTO t2 VALUES ((SELECT max(a) FROM t1), (SELECT min(a) FROM t1)); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL # No tables used 3 SUBQUERY t1 p0,p1,p2 ALL NULL NULL NULL NULL # NULL 2 SUBQUERY t1 p0,p1,p2 ALL NULL NULL NULL NULL # NULL SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 24 HANDLER_WRITE 17 # 24 locks (3 tables + 3 x 3 partitions) x lock/unlock # I.e. No lock pruning possible FLUSH STATUS; INSERT INTO t2 VALUES ((SELECT a FROM t1 WHERE a = 1), (SELECT b FROM t1 WHERE a = 2)); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_FIRST 2 HANDLER_READ_KEY 2 HANDLER_READ_RND_NEXT 10 HANDLER_WRITE 18 # 16 locks (3 tables + 3 + 1 + 1 partitions) x lock/unlock # I.e. No lock pruning possible on insert table FLUSH STATUS; EXPLAIN PARTITIONS INSERT INTO t2 VALUES ((SELECT a FROM t1 WHERE a = 1), (SELECT b FROM t1 WHERE a = 2)); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL # No tables used 3 SUBQUERY t1 p2 ALL NULL NULL NULL NULL # Using where 2 SUBQUERY t1 p1 ALL NULL NULL NULL NULL # Using where SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_WRITE 17 # 16 locks (3 tables + 3 + 1 + 1 partitions) x lock/unlock # I.e. No lock pruning possible on insert table SELECT * FROM t2 ORDER BY a, b; a b 1 0 11 1 DROP TABLE t1; DROP TABLE t2; # # Test of InnoDB INSERT TABLE with non existing table in trigger # CREATE TABLE t1 (a INT) ENGINE = InnoDB; # Create a table to be used in a trigger on t1 CREATE TABLE t2 (a INT) ENGINE = InnoDB; # Create a trigger on t1 which uses t2 CREATE TRIGGER tr1_1_N BEFORE INSERT ON t1 FOR EACH ROW BEGIN UPDATE t2 SET a = 8 WHERE a > 3 LIMIT 0; END// # Drop t2 to cause a failure when inserting into t1 DROP TABLE t2; INSERT INTO t1 VALUES (1); ERROR 42S02: Table 'test.t2' doesn't exist DROP TABLE t1; CREATE TABLE t1 (a INT) PARTITION BY HASH (a) PARTITIONS 3; INSERT INTO t1 VALUES (1), (3), (9), (2), (8), (7); FLUSH STATUS; CREATE TABLE t2 SELECT * FROM t1 PARTITION (p1, p2); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 2 HANDLER_READ_KEY 2 HANDLER_READ_RND_NEXT 6 HANDLER_WRITE 21 # 8 locks (2 tables, 2 partitions, lock/unlock) SELECT * FROM t2; a 1 2 7 8 DROP TABLE t2; FLUSH STATUS; CREATE TABLE t2 SELECT * FROM t1 WHERE a IN (1, 3, 9); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 2 HANDLER_READ_KEY 2 HANDLER_READ_RND_NEXT 6 HANDLER_WRITE 20 # 8 locks (2 tables, 2 partitions, lock/unlock) SELECT * FROM t2; a 1 3 9 DROP TABLE t1, t2; # # Test subqueries/stored functions with UPDATE/DELETE/SELECT # CREATE TABLE tq (id int PRIMARY KEY auto_increment, query varchar(255), not_select tinyint); CREATE TABLE tsq (id int PRIMARY KEY auto_increment, subquery varchar(255), can_be_locked tinyint); CREATE TABLE t1 (a int, b varchar(255), PRIMARY KEY (a), KEY (b)) ENGINE = InnoDB PARTITION BY HASH (a) PARTITIONS 3; CREATE TABLE t2 (a int, b varchar(255), PRIMARY KEY (a), KEY (b)) ENGINE = InnoDB PARTITION BY HASH (a) PARTITIONS 3; START TRANSACTION; INSERT INTO t1 VALUES (1, "1"); INSERT INTO t1 VALUES (2, "2"); INSERT INTO t1 VALUES (8, "8"); INSERT INTO t2 VALUES (1, "1"); INSERT INTO t2 VALUES (2, "2"); INSERT INTO t2 VALUES (8, "8"); CREATE FUNCTION sf_add_hello(s VARCHAR(240)) RETURNS VARCHAR(246) DETERMINISTIC RETURN CONCAT('hello ', s); CREATE FUNCTION sf_add_1(i INT) RETURNS INT DETERMINISTIC RETURN i + 1; CREATE FUNCTION sf_a_from_t1b_d(s varchar(128)) RETURNS INT DETERMINISTIC BEGIN DECLARE i INT; SELECT a INTO i FROM t1 where b = s; RETURN i; END| CREATE FUNCTION sf_a_from_t1b(s varchar(128)) RETURNS INT BEGIN DECLARE i INT; SELECT a INTO i FROM t1 where b = s; RETURN i; END| INSERT INTO tq (query, not_select) VALUES ("SELECT * FROM t2", 0), ("SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2", 0), ("UPDATE t2 SET b = CONCAT('+', b)", 1), ("UPDATE t2 SET b = sf_add_hello(b)", 1), ("UPDATE t2 SET a = sf_add_1(a) + 4", 1), ("DELETE FROM t2", 1); INSERT INTO tsq (subquery, can_be_locked) VALUES ("(SELECT a FROM t1 WHERE b = '1')", 1), ("7 + (SELECT a FROM t1 WHERE b = '1')", 1), ("sf_a_from_t1b('1')", 1), ("sf_a_from_t1b_d('1')", 1), ("7 + sf_a_from_t1b('1')", 1), ("7 + sf_a_from_t1b_d('1')", 1), ("sf_a_from_t1b('1') AND a = 2", 1), ("sf_a_from_t1b_d('1') AND a = 2", 1), ("(SELECT a FROM t1 WHERE b = '1') AND a = 2", 1), ("(SELECT a FROM t1 WHERE b = '1') OR a = 2", 1), ("(SELECT a FROM t1 WHERE b = '1') AND a = 2 OR a = 8 AND sf_a_from_t1b('2')", 0); set @old_autocommit= @@autocommit; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p1 const PRIMARY PRIMARY 4 const # NULL 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; SELECT * FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1'); a b 1 1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; SELECT * FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1'); a b 1 1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 UNLOCK TABLES; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a = 7 + (SELECT a FROM t1 WHERE b = '1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p2 const PRIMARY PRIMARY 4 const # NULL 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; SELECT * FROM t2 WHERE a = 7 + (SELECT a FROM t1 WHERE b = '1'); a b 8 8 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; SELECT * FROM t2 WHERE a = 7 + (SELECT a FROM t1 WHERE b = '1'); a b 8 8 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 UNLOCK TABLES; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a = sf_a_from_t1b('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2 index NULL b 258 NULL # Using where; Using index FLUSH STATUS; START TRANSACTION; SELECT * FROM t2 WHERE a = sf_a_from_t1b('1'); a b 1 1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 12 HANDLER_READ_NEXT 6 HANDLER_WRITE 17 FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; SELECT * FROM t2 WHERE a = sf_a_from_t1b('1'); a b 1 1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 12 HANDLER_READ_NEXT 6 HANDLER_WRITE 17 UNLOCK TABLES; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a = sf_a_from_t1b_d('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p1 const PRIMARY PRIMARY 4 const # NULL FLUSH STATUS; START TRANSACTION; SELECT * FROM t2 WHERE a = sf_a_from_t1b_d('1'); a b 1 1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 10 HANDLER_READ_NEXT 3 HANDLER_WRITE 17 FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; SELECT * FROM t2 WHERE a = sf_a_from_t1b_d('1'); a b 1 1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 10 HANDLER_READ_NEXT 3 HANDLER_WRITE 17 UNLOCK TABLES; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a = 7 + sf_a_from_t1b('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2 index NULL b 258 NULL # Using where; Using index FLUSH STATUS; START TRANSACTION; SELECT * FROM t2 WHERE a = 7 + sf_a_from_t1b('1'); a b 8 8 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 12 HANDLER_READ_NEXT 6 HANDLER_WRITE 17 FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; SELECT * FROM t2 WHERE a = 7 + sf_a_from_t1b('1'); a b 8 8 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 12 HANDLER_READ_NEXT 6 HANDLER_WRITE 17 UNLOCK TABLES; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a = 7 + sf_a_from_t1b_d('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p2 const PRIMARY PRIMARY 4 const # NULL FLUSH STATUS; START TRANSACTION; SELECT * FROM t2 WHERE a = 7 + sf_a_from_t1b_d('1'); a b 8 8 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 10 HANDLER_READ_NEXT 3 HANDLER_WRITE 17 FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; SELECT * FROM t2 WHERE a = 7 + sf_a_from_t1b_d('1'); a b 8 8 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 10 HANDLER_READ_NEXT 3 HANDLER_WRITE 17 UNLOCK TABLES; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a = sf_a_from_t1b('1') AND a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p2 const PRIMARY PRIMARY 4 const # NULL FLUSH STATUS; START TRANSACTION; SELECT * FROM t2 WHERE a = sf_a_from_t1b('1') AND a = 2; a b SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 12 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; SELECT * FROM t2 WHERE a = sf_a_from_t1b('1') AND a = 2; a b SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 UNLOCK TABLES; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a = sf_a_from_t1b_d('1') AND a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL # Impossible WHERE FLUSH STATUS; START TRANSACTION; SELECT * FROM t2 WHERE a = sf_a_from_t1b_d('1') AND a = 2; a b SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 12 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; SELECT * FROM t2 WHERE a = sf_a_from_t1b_d('1') AND a = 2; a b SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 UNLOCK TABLES; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL # Impossible WHERE 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; SELECT * FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2; a b SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 12 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; SELECT * FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2; a b SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 UNLOCK TABLES; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') OR a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p1,p2 index PRIMARY b 258 NULL # Using where; Using index 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; SELECT * FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') OR a = 2; a b 1 1 2 2 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_FIRST 2 HANDLER_READ_KEY 5 HANDLER_READ_NEXT 4 HANDLER_WRITE 17 FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; SELECT * FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') OR a = 2; a b 1 1 2 2 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 2 HANDLER_READ_KEY 5 HANDLER_READ_NEXT 4 HANDLER_WRITE 17 UNLOCK TABLES; EXPLAIN PARTITIONS SELECT * FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2 OR a = 8 AND sf_a_from_t1b('2'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p2 const PRIMARY PRIMARY 4 const # NULL 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; SELECT * FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2 OR a = 8 AND sf_a_from_t1b('2'); a b 8 8 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 20 HANDLER_READ_KEY 7 HANDLER_READ_NEXT 2 HANDLER_WRITE 17 EXPLAIN PARTITIONS SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p1 const PRIMARY PRIMARY 4 const # NULL 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1'); sf_add_1(a) - 1 sf_add_hello(b) 1 hello 1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1'); sf_add_1(a) - 1 sf_add_hello(b) 1 hello 1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 UNLOCK TABLES; EXPLAIN PARTITIONS SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = 7 + (SELECT a FROM t1 WHERE b = '1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p2 const PRIMARY PRIMARY 4 const # NULL 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = 7 + (SELECT a FROM t1 WHERE b = '1'); sf_add_1(a) - 1 sf_add_hello(b) 8 hello 8 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = 7 + (SELECT a FROM t1 WHERE b = '1'); sf_add_1(a) - 1 sf_add_hello(b) 8 hello 8 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 UNLOCK TABLES; EXPLAIN PARTITIONS SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = sf_a_from_t1b('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2 index NULL b 258 NULL # Using where; Using index FLUSH STATUS; START TRANSACTION; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = sf_a_from_t1b('1'); sf_add_1(a) - 1 sf_add_hello(b) 1 hello 1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 12 HANDLER_READ_NEXT 6 HANDLER_WRITE 17 FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = sf_a_from_t1b('1'); sf_add_1(a) - 1 sf_add_hello(b) 1 hello 1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 12 HANDLER_READ_NEXT 6 HANDLER_WRITE 17 UNLOCK TABLES; EXPLAIN PARTITIONS SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = sf_a_from_t1b_d('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p1 const PRIMARY PRIMARY 4 const # NULL FLUSH STATUS; START TRANSACTION; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = sf_a_from_t1b_d('1'); sf_add_1(a) - 1 sf_add_hello(b) 1 hello 1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 10 HANDLER_READ_NEXT 3 HANDLER_WRITE 17 FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = sf_a_from_t1b_d('1'); sf_add_1(a) - 1 sf_add_hello(b) 1 hello 1 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 10 HANDLER_READ_NEXT 3 HANDLER_WRITE 17 UNLOCK TABLES; EXPLAIN PARTITIONS SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = 7 + sf_a_from_t1b('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2 index NULL b 258 NULL # Using where; Using index FLUSH STATUS; START TRANSACTION; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = 7 + sf_a_from_t1b('1'); sf_add_1(a) - 1 sf_add_hello(b) 8 hello 8 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 12 HANDLER_READ_NEXT 6 HANDLER_WRITE 17 FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = 7 + sf_a_from_t1b('1'); sf_add_1(a) - 1 sf_add_hello(b) 8 hello 8 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 12 HANDLER_READ_NEXT 6 HANDLER_WRITE 17 UNLOCK TABLES; EXPLAIN PARTITIONS SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = 7 + sf_a_from_t1b_d('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p2 const PRIMARY PRIMARY 4 const # NULL FLUSH STATUS; START TRANSACTION; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = 7 + sf_a_from_t1b_d('1'); sf_add_1(a) - 1 sf_add_hello(b) 8 hello 8 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 10 HANDLER_READ_NEXT 3 HANDLER_WRITE 17 FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = 7 + sf_a_from_t1b_d('1'); sf_add_1(a) - 1 sf_add_hello(b) 8 hello 8 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 10 HANDLER_READ_NEXT 3 HANDLER_WRITE 17 UNLOCK TABLES; EXPLAIN PARTITIONS SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = sf_a_from_t1b('1') AND a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p2 const PRIMARY PRIMARY 4 const # NULL FLUSH STATUS; START TRANSACTION; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = sf_a_from_t1b('1') AND a = 2; sf_add_1(a) - 1 sf_add_hello(b) SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 12 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = sf_a_from_t1b('1') AND a = 2; sf_add_1(a) - 1 sf_add_hello(b) SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 UNLOCK TABLES; EXPLAIN PARTITIONS SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = sf_a_from_t1b_d('1') AND a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL # Impossible WHERE FLUSH STATUS; START TRANSACTION; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = sf_a_from_t1b_d('1') AND a = 2; sf_add_1(a) - 1 sf_add_hello(b) SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 12 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = sf_a_from_t1b_d('1') AND a = 2; sf_add_1(a) - 1 sf_add_hello(b) SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 UNLOCK TABLES; EXPLAIN PARTITIONS SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL # Impossible WHERE 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2; sf_add_1(a) - 1 sf_add_hello(b) SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 12 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2; sf_add_1(a) - 1 sf_add_hello(b) SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 UNLOCK TABLES; EXPLAIN PARTITIONS SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') OR a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p1,p2 index PRIMARY b 258 NULL # Using where; Using index 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') OR a = 2; sf_add_1(a) - 1 sf_add_hello(b) 1 hello 1 2 hello 2 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_FIRST 2 HANDLER_READ_KEY 5 HANDLER_READ_NEXT 4 HANDLER_WRITE 17 FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') OR a = 2; sf_add_1(a) - 1 sf_add_hello(b) 1 hello 1 2 hello 2 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 2 HANDLER_READ_KEY 5 HANDLER_READ_NEXT 4 HANDLER_WRITE 17 UNLOCK TABLES; EXPLAIN PARTITIONS SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2 OR a = 8 AND sf_a_from_t1b('2'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p2 const PRIMARY PRIMARY 4 const # NULL 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; SELECT sf_add_1(a) - 1, sf_add_hello(b) FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2 OR a = 8 AND sf_a_from_t1b('2'); sf_add_1(a) - 1 sf_add_hello(b) 8 hello 8 SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 20 HANDLER_READ_KEY 7 HANDLER_READ_NEXT 2 HANDLER_WRITE 17 EXPLAIN PARTITIONS UPDATE t2 SET b = CONCAT('+', b) WHERE a = (SELECT a FROM t1 WHERE b = '1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p1 range PRIMARY PRIMARY 4 const # Using where 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = CONCAT('+', b) WHERE a = (SELECT a FROM t1 WHERE b = '1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 +1 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET b = CONCAT('+', b) WHERE a = (SELECT a FROM t1 WHERE b = '1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 +1 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET b = CONCAT('+', b) WHERE a = 7 + (SELECT a FROM t1 WHERE b = '1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p2 range PRIMARY PRIMARY 4 const # Using where 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = CONCAT('+', b) WHERE a = 7 + (SELECT a FROM t1 WHERE b = '1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 +8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET b = CONCAT('+', b) WHERE a = 7 + (SELECT a FROM t1 WHERE b = '1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 +8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET b = CONCAT('+', b) WHERE a = sf_a_from_t1b('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2 index NULL PRIMARY 4 NULL # Using where FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = CONCAT('+', b) WHERE a = sf_a_from_t1b('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 12 HANDLER_READ_NEXT 3 HANDLER_READ_RND_NEXT 6 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 +1 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET b = CONCAT('+', b) WHERE a = sf_a_from_t1b('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 12 HANDLER_READ_NEXT 3 HANDLER_READ_RND_NEXT 6 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 +1 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET b = CONCAT('+', b) WHERE a = sf_a_from_t1b_d('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p1 range PRIMARY PRIMARY 4 const # Using where FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = CONCAT('+', b) WHERE a = sf_a_from_t1b_d('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 10 HANDLER_READ_NEXT 3 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 +1 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET b = CONCAT('+', b) WHERE a = sf_a_from_t1b_d('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 10 HANDLER_READ_NEXT 3 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 +1 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET b = CONCAT('+', b) WHERE a = 7 + sf_a_from_t1b('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2 index NULL PRIMARY 4 NULL # Using where FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = CONCAT('+', b) WHERE a = 7 + sf_a_from_t1b('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 12 HANDLER_READ_NEXT 3 HANDLER_READ_RND_NEXT 6 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 +8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET b = CONCAT('+', b) WHERE a = 7 + sf_a_from_t1b('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 12 HANDLER_READ_NEXT 3 HANDLER_READ_RND_NEXT 6 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 +8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET b = CONCAT('+', b) WHERE a = 7 + sf_a_from_t1b_d('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p2 range PRIMARY PRIMARY 4 const # Using where FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = CONCAT('+', b) WHERE a = 7 + sf_a_from_t1b_d('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 10 HANDLER_READ_NEXT 3 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 +8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET b = CONCAT('+', b) WHERE a = 7 + sf_a_from_t1b_d('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 10 HANDLER_READ_NEXT 3 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 +8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET b = CONCAT('+', b) WHERE a = sf_a_from_t1b('1') AND a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p2 range PRIMARY PRIMARY 4 const # Using where FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = CONCAT('+', b) WHERE a = sf_a_from_t1b('1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 12 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET b = CONCAT('+', b) WHERE a = sf_a_from_t1b('1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET b = CONCAT('+', b) WHERE a = sf_a_from_t1b_d('1') AND a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL # Impossible WHERE FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = CONCAT('+', b) WHERE a = sf_a_from_t1b_d('1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 12 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET b = CONCAT('+', b) WHERE a = sf_a_from_t1b_d('1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET b = CONCAT('+', b) WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL # Impossible WHERE 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = CONCAT('+', b) WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 12 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET b = CONCAT('+', b) WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET b = CONCAT('+', b) WHERE a = (SELECT a FROM t1 WHERE b = '1') OR a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p1,p2 range PRIMARY PRIMARY 4 const # Using where 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = CONCAT('+', b) WHERE a = (SELECT a FROM t1 WHERE b = '1') OR a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 5 HANDLER_READ_NEXT 1 HANDLER_UPDATE 2 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 +1 2 +2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET b = CONCAT('+', b) WHERE a = (SELECT a FROM t1 WHERE b = '1') OR a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 5 HANDLER_READ_NEXT 1 HANDLER_UPDATE 2 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 +1 2 +2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET b = CONCAT('+', b) WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2 OR a = 8 AND sf_a_from_t1b('2'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p2 range PRIMARY PRIMARY 4 const # Using where 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = CONCAT('+', b) WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2 OR a = 8 AND sf_a_from_t1b('2'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 20 HANDLER_READ_KEY 7 HANDLER_READ_NEXT 2 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 +8 ROLLBACK; EXPLAIN PARTITIONS UPDATE t2 SET b = sf_add_hello(b) WHERE a = (SELECT a FROM t1 WHERE b = '1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p1 range PRIMARY PRIMARY 4 const # Using where 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = sf_add_hello(b) WHERE a = (SELECT a FROM t1 WHERE b = '1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 hello 1 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET b = sf_add_hello(b) WHERE a = (SELECT a FROM t1 WHERE b = '1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 hello 1 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET b = sf_add_hello(b) WHERE a = 7 + (SELECT a FROM t1 WHERE b = '1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p2 range PRIMARY PRIMARY 4 const # Using where 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = sf_add_hello(b) WHERE a = 7 + (SELECT a FROM t1 WHERE b = '1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 hello 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET b = sf_add_hello(b) WHERE a = 7 + (SELECT a FROM t1 WHERE b = '1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 hello 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET b = sf_add_hello(b) WHERE a = sf_a_from_t1b('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2 index NULL PRIMARY 4 NULL # Using where FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = sf_add_hello(b) WHERE a = sf_a_from_t1b('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 12 HANDLER_READ_NEXT 3 HANDLER_READ_RND_NEXT 6 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 hello 1 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET b = sf_add_hello(b) WHERE a = sf_a_from_t1b('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 12 HANDLER_READ_NEXT 3 HANDLER_READ_RND_NEXT 6 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 hello 1 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET b = sf_add_hello(b) WHERE a = sf_a_from_t1b_d('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p1 range PRIMARY PRIMARY 4 const # Using where FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = sf_add_hello(b) WHERE a = sf_a_from_t1b_d('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 10 HANDLER_READ_NEXT 3 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 hello 1 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET b = sf_add_hello(b) WHERE a = sf_a_from_t1b_d('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 10 HANDLER_READ_NEXT 3 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 hello 1 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET b = sf_add_hello(b) WHERE a = 7 + sf_a_from_t1b('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2 index NULL PRIMARY 4 NULL # Using where FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = sf_add_hello(b) WHERE a = 7 + sf_a_from_t1b('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 12 HANDLER_READ_NEXT 3 HANDLER_READ_RND_NEXT 6 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 hello 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET b = sf_add_hello(b) WHERE a = 7 + sf_a_from_t1b('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 12 HANDLER_READ_NEXT 3 HANDLER_READ_RND_NEXT 6 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 hello 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET b = sf_add_hello(b) WHERE a = 7 + sf_a_from_t1b_d('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p2 range PRIMARY PRIMARY 4 const # Using where FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = sf_add_hello(b) WHERE a = 7 + sf_a_from_t1b_d('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 10 HANDLER_READ_NEXT 3 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 hello 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET b = sf_add_hello(b) WHERE a = 7 + sf_a_from_t1b_d('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 10 HANDLER_READ_NEXT 3 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 hello 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET b = sf_add_hello(b) WHERE a = sf_a_from_t1b('1') AND a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p2 range PRIMARY PRIMARY 4 const # Using where FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = sf_add_hello(b) WHERE a = sf_a_from_t1b('1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 12 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET b = sf_add_hello(b) WHERE a = sf_a_from_t1b('1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET b = sf_add_hello(b) WHERE a = sf_a_from_t1b_d('1') AND a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL # Impossible WHERE FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = sf_add_hello(b) WHERE a = sf_a_from_t1b_d('1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 12 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET b = sf_add_hello(b) WHERE a = sf_a_from_t1b_d('1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET b = sf_add_hello(b) WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL # Impossible WHERE 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = sf_add_hello(b) WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 12 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET b = sf_add_hello(b) WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET b = sf_add_hello(b) WHERE a = (SELECT a FROM t1 WHERE b = '1') OR a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p1,p2 range PRIMARY PRIMARY 4 const # Using where 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = sf_add_hello(b) WHERE a = (SELECT a FROM t1 WHERE b = '1') OR a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 5 HANDLER_READ_NEXT 1 HANDLER_UPDATE 2 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 hello 1 2 hello 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET b = sf_add_hello(b) WHERE a = (SELECT a FROM t1 WHERE b = '1') OR a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 5 HANDLER_READ_NEXT 1 HANDLER_UPDATE 2 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 hello 1 2 hello 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET b = sf_add_hello(b) WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2 OR a = 8 AND sf_a_from_t1b('2'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p2 range PRIMARY PRIMARY 4 const # Using where 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; UPDATE t2 SET b = sf_add_hello(b) WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2 OR a = 8 AND sf_a_from_t1b('2'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 20 HANDLER_READ_KEY 7 HANDLER_READ_NEXT 2 HANDLER_UPDATE 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 hello 8 ROLLBACK; EXPLAIN PARTITIONS UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = (SELECT a FROM t1 WHERE b = '1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p1 range PRIMARY PRIMARY 4 const # Using where; Using temporary 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = (SELECT a FROM t1 WHERE b = '1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 5 HANDLER_READ_NEXT 1 HANDLER_READ_RND 1 HANDLER_WRITE 18 SELECT * FROM t2; a b 2 2 6 1 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = (SELECT a FROM t1 WHERE b = '1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 5 HANDLER_READ_NEXT 1 HANDLER_READ_RND 1 HANDLER_WRITE 18 SELECT * FROM t2; a b 2 2 6 1 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = 7 + (SELECT a FROM t1 WHERE b = '1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p2 range PRIMARY PRIMARY 4 const # Using where; Using temporary 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = 7 + (SELECT a FROM t1 WHERE b = '1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 5 HANDLER_READ_NEXT 1 HANDLER_READ_RND 1 HANDLER_WRITE 18 SELECT * FROM t2; a b 1 1 13 8 2 2 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = 7 + (SELECT a FROM t1 WHERE b = '1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 5 HANDLER_READ_NEXT 1 HANDLER_READ_RND 1 HANDLER_WRITE 18 SELECT * FROM t2; a b 1 1 13 8 2 2 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = sf_a_from_t1b('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2 index NULL PRIMARY 4 NULL # Using where; Using temporary FLUSH STATUS; START TRANSACTION; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = sf_a_from_t1b('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 13 HANDLER_READ_NEXT 6 HANDLER_READ_RND 1 HANDLER_WRITE 18 SELECT * FROM t2; a b 2 2 6 1 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = sf_a_from_t1b('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 13 HANDLER_READ_NEXT 6 HANDLER_READ_RND 1 HANDLER_WRITE 18 SELECT * FROM t2; a b 2 2 6 1 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = sf_a_from_t1b_d('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p1 range PRIMARY PRIMARY 4 const # Using where; Using temporary FLUSH STATUS; START TRANSACTION; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = sf_a_from_t1b_d('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 11 HANDLER_READ_NEXT 3 HANDLER_READ_RND 1 HANDLER_WRITE 18 SELECT * FROM t2; a b 2 2 6 1 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = sf_a_from_t1b_d('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 11 HANDLER_READ_NEXT 3 HANDLER_READ_RND 1 HANDLER_WRITE 18 SELECT * FROM t2; a b 2 2 6 1 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = 7 + sf_a_from_t1b('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2 index NULL PRIMARY 4 NULL # Using where; Using temporary FLUSH STATUS; START TRANSACTION; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = 7 + sf_a_from_t1b('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 13 HANDLER_READ_NEXT 6 HANDLER_READ_RND 1 HANDLER_WRITE 18 SELECT * FROM t2; a b 1 1 13 8 2 2 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = 7 + sf_a_from_t1b('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 13 HANDLER_READ_NEXT 6 HANDLER_READ_RND 1 HANDLER_WRITE 18 SELECT * FROM t2; a b 1 1 13 8 2 2 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = 7 + sf_a_from_t1b_d('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p2 range PRIMARY PRIMARY 4 const # Using where; Using temporary FLUSH STATUS; START TRANSACTION; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = 7 + sf_a_from_t1b_d('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 11 HANDLER_READ_NEXT 3 HANDLER_READ_RND 1 HANDLER_WRITE 18 SELECT * FROM t2; a b 1 1 13 8 2 2 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = 7 + sf_a_from_t1b_d('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 11 HANDLER_READ_NEXT 3 HANDLER_READ_RND 1 HANDLER_WRITE 18 SELECT * FROM t2; a b 1 1 13 8 2 2 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = sf_a_from_t1b('1') AND a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p2 range PRIMARY PRIMARY 4 const # Using where; Using temporary FLUSH STATUS; START TRANSACTION; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = sf_a_from_t1b('1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = sf_a_from_t1b('1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = sf_a_from_t1b_d('1') AND a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL # Impossible WHERE FLUSH STATUS; START TRANSACTION; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = sf_a_from_t1b_d('1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = sf_a_from_t1b_d('1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL # Impossible WHERE 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = (SELECT a FROM t1 WHERE b = '1') OR a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p1,p2 range PRIMARY PRIMARY 4 const # Using where; Using temporary 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = (SELECT a FROM t1 WHERE b = '1') OR a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 2 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 7 HANDLER_READ_NEXT 1 HANDLER_READ_RND 2 HANDLER_WRITE 19 SELECT * FROM t2; a b 6 1 7 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = (SELECT a FROM t1 WHERE b = '1') OR a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_DELETE 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 7 HANDLER_READ_NEXT 1 HANDLER_READ_RND 2 HANDLER_WRITE 19 SELECT * FROM t2; a b 6 1 7 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2 OR a = 8 AND sf_a_from_t1b('2'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p2 range PRIMARY PRIMARY 4 const # Using where; Using temporary 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; UPDATE t2 SET a = sf_add_1(a) + 4 WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2 OR a = 8 AND sf_a_from_t1b('2'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 24 HANDLER_READ_KEY 8 HANDLER_READ_NEXT 2 HANDLER_READ_RND 1 HANDLER_WRITE 18 SELECT * FROM t2; a b 1 1 13 8 2 2 ROLLBACK; EXPLAIN PARTITIONS DELETE FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p1 range PRIMARY PRIMARY 4 const # Using where 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; DELETE FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; DELETE FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS DELETE FROM t2 WHERE a = 7 + (SELECT a FROM t1 WHERE b = '1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p2 range PRIMARY PRIMARY 4 const # Using where 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; DELETE FROM t2 WHERE a = 7 + (SELECT a FROM t1 WHERE b = '1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; DELETE FROM t2 WHERE a = 7 + (SELECT a FROM t1 WHERE b = '1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS DELETE FROM t2 WHERE a = sf_a_from_t1b('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2 ALL NULL NULL NULL NULL # Using where FLUSH STATUS; START TRANSACTION; DELETE FROM t2 WHERE a = sf_a_from_t1b('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 12 HANDLER_READ_NEXT 3 HANDLER_READ_RND_NEXT 6 HANDLER_WRITE 17 SELECT * FROM t2; a b 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; DELETE FROM t2 WHERE a = sf_a_from_t1b('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 12 HANDLER_READ_NEXT 3 HANDLER_READ_RND_NEXT 6 HANDLER_WRITE 17 SELECT * FROM t2; a b 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS DELETE FROM t2 WHERE a = sf_a_from_t1b_d('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p1 range PRIMARY PRIMARY 4 const # Using where FLUSH STATUS; START TRANSACTION; DELETE FROM t2 WHERE a = sf_a_from_t1b_d('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 10 HANDLER_READ_NEXT 3 HANDLER_WRITE 17 SELECT * FROM t2; a b 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; DELETE FROM t2 WHERE a = sf_a_from_t1b_d('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 10 HANDLER_READ_NEXT 3 HANDLER_WRITE 17 SELECT * FROM t2; a b 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS DELETE FROM t2 WHERE a = 7 + sf_a_from_t1b('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2 ALL NULL NULL NULL NULL # Using where FLUSH STATUS; START TRANSACTION; DELETE FROM t2 WHERE a = 7 + sf_a_from_t1b('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 12 HANDLER_READ_NEXT 3 HANDLER_READ_RND_NEXT 6 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; DELETE FROM t2 WHERE a = 7 + sf_a_from_t1b('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_FIRST 3 HANDLER_READ_KEY 12 HANDLER_READ_NEXT 3 HANDLER_READ_RND_NEXT 6 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS DELETE FROM t2 WHERE a = 7 + sf_a_from_t1b_d('1'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p2 range PRIMARY PRIMARY 4 const # Using where FLUSH STATUS; START TRANSACTION; DELETE FROM t2 WHERE a = 7 + sf_a_from_t1b_d('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 10 HANDLER_READ_NEXT 3 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; DELETE FROM t2 WHERE a = 7 + sf_a_from_t1b_d('1'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 10 HANDLER_READ_NEXT 3 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS DELETE FROM t2 WHERE a = sf_a_from_t1b('1') AND a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p2 range PRIMARY PRIMARY 4 const # Using where FLUSH STATUS; START TRANSACTION; DELETE FROM t2 WHERE a = sf_a_from_t1b('1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 12 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; DELETE FROM t2 WHERE a = sf_a_from_t1b('1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 4 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS DELETE FROM t2 WHERE a = sf_a_from_t1b_d('1') AND a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL # Impossible WHERE FLUSH STATUS; START TRANSACTION; DELETE FROM t2 WHERE a = sf_a_from_t1b_d('1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 12 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; DELETE FROM t2 WHERE a = sf_a_from_t1b_d('1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS DELETE FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL # Impossible WHERE 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; DELETE FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_EXTERNAL_LOCK 12 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; DELETE FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 3 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS DELETE FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') OR a = 2; id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p1,p2 range PRIMARY PRIMARY 4 const # Using where 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; DELETE FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') OR a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 2 HANDLER_EXTERNAL_LOCK 16 HANDLER_READ_KEY 5 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 8 8 ROLLBACK; FLUSH STATUS; SET autocommit = 0; LOCK TABLES t1 read, t2 write; DELETE FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') OR a = 2; SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 2 HANDLER_DELETE 2 HANDLER_EXTERNAL_LOCK 8 HANDLER_READ_KEY 5 HANDLER_READ_NEXT 1 HANDLER_WRITE 17 SELECT * FROM t2; a b 8 8 ROLLBACK; UNLOCK TABLES; EXPLAIN PARTITIONS DELETE FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2 OR a = 8 AND sf_a_from_t1b('2'); id select_type table partitions type possible_keys key key_len ref rows Extra 1 PRIMARY t2 p2 range PRIMARY PRIMARY 4 const # Using where 2 SUBQUERY t1 p0,p1,p2 ref b b 258 const # Using where; Using index FLUSH STATUS; START TRANSACTION; DELETE FROM t2 WHERE a = (SELECT a FROM t1 WHERE b = '1') AND a = 2 OR a = 8 AND sf_a_from_t1b('2'); SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME LIKE 'HANDLER_%' AND VARIABLE_VALUE > 0; VARIABLE_NAME VARIABLE_VALUE HANDLER_COMMIT 1 HANDLER_DELETE 1 HANDLER_EXTERNAL_LOCK 20 HANDLER_READ_KEY 7 HANDLER_READ_NEXT 2 HANDLER_WRITE 17 SELECT * FROM t2; a b 1 1 2 2 ROLLBACK; set @@autocommit= @old_autocommit; DROP FUNCTION sf_add_hello; DROP FUNCTION sf_add_1; DROP FUNCTION sf_a_from_t1b_d; DROP FUNCTION sf_a_from_t1b; DROP TABLE tq, tsq, t1, t2; SET @@global.innodb_stats_persistent= @old_innodb_stats_persistent;