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CREATE TABLE t ( a INT, b INT, c INT, d INT, e INT, f INT, PRIMARY KEY (a), INDEX i1 (b), INDEX i2 (c), INDEX i3 (d), INDEX i4 (e) ) ENGINE=INNODB; INSERT INTO t SET a = 1; ALTER TABLE t RENAME INDEX i1 TO GEN_CLUST_INDEX; ERROR 42000: Incorrect index name 'GEN_CLUST_INDEX' ALTER TABLE t RENAME INDEX i1 TO i1; ALTER TABLE t RENAME INDEX aa TO aa; ERROR 42000: Key 'aa' doesn't exist in table 't' # combination: aaaa ALTER TABLE t ADD INDEX i4(f), DROP INDEX i4, RENAME INDEX i4 TO i4; ERROR 42000: Key 'i4' doesn't exist in table 't' # combination: aabb ALTER TABLE t ADD INDEX aa(f), DROP INDEX aa, RENAME INDEX i2 TO i2; ERROR 42000: Can't DROP 'aa'; check that column/key exists ALTER TABLE t ADD INDEX aa(f), DROP INDEX aa, RENAME INDEX bb TO bb; ERROR 42000: Can't DROP 'aa'; check that column/key exists ALTER TABLE t ADD INDEX i1(f), DROP INDEX i1, RENAME INDEX bb TO bb; ERROR 42000: Key 'bb' doesn't exist in table 't' ALTER TABLE t ADD INDEX i1(f), DROP INDEX i1, RENAME INDEX i2 TO i2; affected rows: 0 info: Records: 0 Duplicates: 0 Warnings: 0 SHOW CREATE TABLE t; Table Create Table t CREATE TABLE `t` ( `a` int(11) NOT NULL, `b` int(11) DEFAULT NULL, `c` int(11) DEFAULT NULL, `d` int(11) DEFAULT NULL, `e` int(11) DEFAULT NULL, `f` int(11) DEFAULT NULL, PRIMARY KEY (`a`), KEY `i2` (`c`), KEY `i3` (`d`), KEY `i4` (`e`), KEY `i1` (`f`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 SELECT t.name AS table_name, i.name AS index_name, f.name AS column_name FROM information_schema.innodb_sys_tables t, information_schema.innodb_sys_indexes i, information_schema.innodb_sys_fields f WHERE t.name LIKE '%/t' AND t.table_id = i.table_id AND i.index_id = f.index_id ORDER BY 1, 2, 3; table_name index_name column_name test/t i1 f test/t i2 c test/t i3 d test/t i4 e test/t PRIMARY a SELECT index_name, stat_description FROM mysql.innodb_index_stats WHERE table_name = 't' AND stat_name LIKE 'n_diff%' ORDER BY 1, 2; index_name stat_description PRIMARY a i1 f i1 f,a i2 c i2 c,a i3 d i3 d,a i4 e i4 e,a DROP TABLE t; CREATE TABLE t ( a INT, b INT, c INT, d INT, e INT, f INT, PRIMARY KEY (a), INDEX i1 (b), INDEX i2 (c), INDEX i3 (d), INDEX i4 (e) ) ENGINE=INNODB; INSERT INTO t SET a = 1; # combination: abcc ALTER TABLE t ADD INDEX aa(f), DROP INDEX bb, RENAME INDEX cc TO cc; ERROR 42000: Can't DROP 'bb'; check that column/key exists ALTER TABLE t ADD INDEX aa(f), DROP INDEX bb, RENAME INDEX i3 TO i3; ERROR 42000: Can't DROP 'bb'; check that column/key exists ALTER TABLE t ADD INDEX aa(f), DROP INDEX i2, RENAME INDEX cc TO cc; ERROR 42000: Key 'cc' doesn't exist in table 't' ALTER TABLE t ADD INDEX aa(f), DROP INDEX i2, RENAME INDEX i3 TO i3; affected rows: 0 info: Records: 0 Duplicates: 0 Warnings: 0 SHOW CREATE TABLE t; Table Create Table t CREATE TABLE `t` ( `a` int(11) NOT NULL, `b` int(11) DEFAULT NULL, `c` int(11) DEFAULT NULL, `d` int(11) DEFAULT NULL, `e` int(11) DEFAULT NULL, `f` int(11) DEFAULT NULL, PRIMARY KEY (`a`), KEY `i1` (`b`), KEY `i3` (`d`), KEY `i4` (`e`), KEY `aa` (`f`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 SELECT t.name AS table_name, i.name AS index_name, f.name AS column_name FROM information_schema.innodb_sys_tables t, information_schema.innodb_sys_indexes i, information_schema.innodb_sys_fields f WHERE t.name LIKE '%/t' AND t.table_id = i.table_id AND i.index_id = f.index_id ORDER BY 1, 2, 3; table_name index_name column_name test/t aa f test/t i1 b test/t i3 d test/t i4 e test/t PRIMARY a SELECT index_name, stat_description FROM mysql.innodb_index_stats WHERE table_name = 't' AND stat_name LIKE 'n_diff%' ORDER BY 1, 2; index_name stat_description PRIMARY a aa f aa f,a i1 b i1 b,a i3 d i3 d,a i4 e i4 e,a DROP TABLE t; CREATE TABLE t ( a INT, b INT, c INT, d INT, e INT, f INT, PRIMARY KEY (a), INDEX i1 (b), INDEX i2 (c), INDEX i3 (d), INDEX i4 (e) ) ENGINE=INNODB; INSERT INTO t SET a = 1; # combination: abaa ALTER TABLE t ADD INDEX aa(f), DROP INDEX i1, RENAME INDEX aa TO aa; ERROR 42000: Key 'aa' doesn't exist in table 't' ALTER TABLE t ADD INDEX i1(f), DROP INDEX i2, RENAME INDEX i1 TO i1; ERROR 42000: Duplicate key name 'i1' ALTER TABLE t ADD INDEX i1(f), DROP INDEX bb, RENAME INDEX i1 TO i1; ERROR 42000: Can't DROP 'bb'; check that column/key exists ALTER TABLE t ADD INDEX aa(f), DROP INDEX bb, RENAME INDEX aa TO aa; ERROR 42000: Can't DROP 'bb'; check that column/key exists # combination: baaa ALTER TABLE t ADD INDEX i2(f), DROP INDEX i1, RENAME INDEX i1 TO i1; ERROR 42000: Key 'i1' doesn't exist in table 't' ALTER TABLE t ADD INDEX bb(f), DROP INDEX i1, RENAME INDEX i1 TO i1; ERROR 42000: Key 'i1' doesn't exist in table 't' ALTER TABLE t ADD INDEX i2(f), DROP INDEX aa, RENAME INDEX aa TO aa; ERROR 42000: Can't DROP 'aa'; check that column/key exists ALTER TABLE t ADD INDEX bb(f), DROP INDEX aa, RENAME INDEX aa TO aa; ERROR 42000: Can't DROP 'aa'; check that column/key exists ALTER TABLE t ADD INDEX aa(f), RENAME INDEX aa TO bb; ERROR 42000: Key 'aa' doesn't exist in table 't' ALTER TABLE t ADD INDEX aa(f), RENAME INDEX bb TO aa; ERROR 42000: Key 'bb' doesn't exist in table 't' ALTER TABLE t ADD INDEX aa(f), RENAME INDEX i2 TO aa; ERROR 42000: Duplicate key name 'aa' ALTER TABLE t ADD INDEX i1(f), RENAME INDEX i1 TO bb; affected rows: 0 info: Records: 0 Duplicates: 0 Warnings: 0 SHOW CREATE TABLE t; Table Create Table t CREATE TABLE `t` ( `a` int(11) NOT NULL, `b` int(11) DEFAULT NULL, `c` int(11) DEFAULT NULL, `d` int(11) DEFAULT NULL, `e` int(11) DEFAULT NULL, `f` int(11) DEFAULT NULL, PRIMARY KEY (`a`), KEY `bb` (`b`), KEY `i2` (`c`), KEY `i3` (`d`), KEY `i4` (`e`), KEY `i1` (`f`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 SELECT t.name AS table_name, i.name AS index_name, f.name AS column_name FROM information_schema.innodb_sys_tables t, information_schema.innodb_sys_indexes i, information_schema.innodb_sys_fields f WHERE t.name LIKE '%/t' AND t.table_id = i.table_id AND i.index_id = f.index_id ORDER BY 1, 2, 3; table_name index_name column_name test/t bb b test/t i1 f test/t i2 c test/t i3 d test/t i4 e test/t PRIMARY a SELECT index_name, stat_description FROM mysql.innodb_index_stats WHERE table_name = 't' AND stat_name LIKE 'n_diff%' ORDER BY 1, 2; index_name stat_description PRIMARY a bb b bb b,a i1 f i1 f,a i2 c i2 c,a i3 d i3 d,a i4 e i4 e,a DROP TABLE t; CREATE TABLE t ( a INT, b INT, c INT, d INT, e INT, f INT, PRIMARY KEY (a), INDEX i1 (b), INDEX i2 (c), INDEX i3 (d), INDEX i4 (e) ) ENGINE=INNODB; INSERT INTO t SET a = 1; # combination: abba ALTER TABLE t ADD INDEX i1(f), DROP INDEX i2, RENAME INDEX i2 TO i1; ERROR 42000: Key 'i2' doesn't exist in table 't' ALTER TABLE t ADD INDEX aa(f), DROP INDEX i2, RENAME INDEX i2 TO aa; ERROR 42000: Key 'i2' doesn't exist in table 't' ALTER TABLE t ADD INDEX i1(f), DROP INDEX bb, RENAME INDEX bb TO i1; ERROR 42000: Can't DROP 'bb'; check that column/key exists ALTER TABLE t ADD INDEX aa(f), DROP INDEX bb, RENAME INDEX bb TO aa; ERROR 42000: Can't DROP 'bb'; check that column/key exists # combination: cabc ALTER TABLE t ADD INDEX i3(f), DROP INDEX i1, RENAME INDEX i2 TO i3; ERROR 42000: Duplicate key name 'i3' ALTER TABLE t ADD INDEX i3(f), DROP INDEX aa, RENAME INDEX i2 TO i3; ERROR 42000: Can't DROP 'aa'; check that column/key exists ALTER TABLE t ADD INDEX i3(f), DROP INDEX i1, RENAME INDEX bb TO i3; ERROR 42000: Key 'bb' doesn't exist in table 't' ALTER TABLE t ADD INDEX i3(f), DROP INDEX aa, RENAME INDEX bb TO i3; ERROR 42000: Can't DROP 'aa'; check that column/key exists ALTER TABLE t ADD INDEX cc(f), DROP INDEX i1, RENAME INDEX i2 TO cc; ERROR 42000: Duplicate key name 'cc' ALTER TABLE t ADD INDEX cc(f), DROP INDEX aa, RENAME INDEX i2 TO cc; ERROR 42000: Can't DROP 'aa'; check that column/key exists ALTER TABLE t ADD INDEX cc(f), DROP INDEX i1, RENAME INDEX bb TO cc; ERROR 42000: Key 'bb' doesn't exist in table 't' ALTER TABLE t ADD INDEX cc(f), DROP INDEX aa, RENAME INDEX bb TO cc; ERROR 42000: Can't DROP 'aa'; check that column/key exists ALTER TABLE t DROP INDEX i1, RENAME INDEX i1 TO bb; ERROR 42000: Key 'i1' doesn't exist in table 't' ALTER TABLE t DROP INDEX aa, RENAME INDEX i2 TO aa; ERROR 42000: Can't DROP 'aa'; check that column/key exists ALTER TABLE t DROP INDEX aa, RENAME INDEX aa TO i2; ERROR 42000: Can't DROP 'aa'; check that column/key exists ALTER TABLE t DROP INDEX i1, RENAME INDEX i4 TO i1; affected rows: 0 info: Records: 0 Duplicates: 0 Warnings: 0 SHOW CREATE TABLE t; Table Create Table t CREATE TABLE `t` ( `a` int(11) NOT NULL, `b` int(11) DEFAULT NULL, `c` int(11) DEFAULT NULL, `d` int(11) DEFAULT NULL, `e` int(11) DEFAULT NULL, `f` int(11) DEFAULT NULL, PRIMARY KEY (`a`), KEY `i2` (`c`), KEY `i3` (`d`), KEY `i1` (`e`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 SELECT t.name AS table_name, i.name AS index_name, f.name AS column_name FROM information_schema.innodb_sys_tables t, information_schema.innodb_sys_indexes i, information_schema.innodb_sys_fields f WHERE t.name LIKE '%/t' AND t.table_id = i.table_id AND i.index_id = f.index_id ORDER BY 1, 2, 3; table_name index_name column_name test/t i1 e test/t i2 c test/t i3 d test/t PRIMARY a SELECT index_name, stat_description FROM mysql.innodb_index_stats WHERE table_name = 't' AND stat_name LIKE 'n_diff%' ORDER BY 1, 2; index_name stat_description PRIMARY a i1 e i1 e,a i2 c i2 c,a i3 d i3 d,a DROP TABLE t; CREATE TABLE t ( a INT, b INT, c INT, d INT, e INT, f INT, PRIMARY KEY (a), INDEX i1 (b), INDEX i2 (c), INDEX i3 (d), INDEX i4 (e) ) ENGINE=INNODB; INSERT INTO t SET a = 1; # combination: accb ALTER TABLE t ADD INDEX i1(f), DROP INDEX i3, RENAME INDEX i3 TO i2; ERROR 42000: Key 'i3' doesn't exist in table 't' ALTER TABLE t ADD INDEX i1(f), DROP INDEX i3, RENAME INDEX i3 TO bb; ERROR 42000: Key 'i3' doesn't exist in table 't' ALTER TABLE t ADD INDEX i1(f), DROP INDEX cc, RENAME INDEX cc TO i2; ERROR 42000: Can't DROP 'cc'; check that column/key exists ALTER TABLE t ADD INDEX i1(f), DROP INDEX cc, RENAME INDEX cc TO bb; ERROR 42000: Can't DROP 'cc'; check that column/key exists ALTER TABLE t ADD INDEX aa(f), DROP INDEX cc, RENAME INDEX cc TO i2; ERROR 42000: Can't DROP 'cc'; check that column/key exists ALTER TABLE t ADD INDEX aa(f), DROP INDEX cc, RENAME INDEX cc TO bb; ERROR 42000: Can't DROP 'cc'; check that column/key exists # combination: aaab ALTER TABLE t ADD INDEX i1(f), DROP INDEX i1, RENAME INDEX i1 TO i2; ERROR 42000: Key 'i1' doesn't exist in table 't' ALTER TABLE t ADD INDEX i1(f), DROP INDEX i1, RENAME INDEX i1 TO bb; ERROR 42000: Key 'i1' doesn't exist in table 't' ALTER TABLE t ADD INDEX i1(f), DROP INDEX i1, RENAME INDEX i1 TO i2; ERROR 42000: Key 'i1' doesn't exist in table 't' ALTER TABLE t ADD INDEX aa(f), DROP INDEX aa, RENAME INDEX aa TO bb; ERROR 42000: Can't DROP 'aa'; check that column/key exists # combination: abcd ALTER TABLE t ADD INDEX i1(f), DROP INDEX i2, RENAME INDEX cc TO i4; ERROR 42000: Key 'cc' doesn't exist in table 't' ALTER TABLE t ADD INDEX i1(f), DROP INDEX i2, RENAME INDEX cc TO dd; ERROR 42000: Key 'cc' doesn't exist in table 't' ALTER TABLE t ADD INDEX aa(f), DROP INDEX i2, RENAME INDEX cc TO i4; ERROR 42000: Key 'cc' doesn't exist in table 't' ALTER TABLE t ADD INDEX aa(f), DROP INDEX i2, RENAME INDEX cc TO dd; ERROR 42000: Key 'cc' doesn't exist in table 't' ALTER TABLE t ADD INDEX i1(f), DROP INDEX i2, RENAME INDEX i3 TO i4; ERROR 42000: Duplicate key name 'i4' ALTER TABLE t ADD INDEX i1(f), DROP INDEX i2, RENAME INDEX i3 TO dd; ERROR 42000: Duplicate key name 'i1' ALTER TABLE t ADD INDEX aa(f), DROP INDEX i2, RENAME INDEX i3 TO i4; ERROR 42000: Duplicate key name 'i4' ALTER TABLE t ADD INDEX aa(f), DROP INDEX i2, RENAME INDEX i3 TO dd; affected rows: 0 info: Records: 0 Duplicates: 0 Warnings: 0 SHOW CREATE TABLE t; Table Create Table t CREATE TABLE `t` ( `a` int(11) NOT NULL, `b` int(11) DEFAULT NULL, `c` int(11) DEFAULT NULL, `d` int(11) DEFAULT NULL, `e` int(11) DEFAULT NULL, `f` int(11) DEFAULT NULL, PRIMARY KEY (`a`), KEY `i1` (`b`), KEY `dd` (`d`), KEY `i4` (`e`), KEY `aa` (`f`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 SELECT t.name AS table_name, i.name AS index_name, f.name AS column_name FROM information_schema.innodb_sys_tables t, information_schema.innodb_sys_indexes i, information_schema.innodb_sys_fields f WHERE t.name LIKE '%/t' AND t.table_id = i.table_id AND i.index_id = f.index_id ORDER BY 1, 2, 3; table_name index_name column_name test/t aa f test/t dd d test/t i1 b test/t i4 e test/t PRIMARY a SELECT index_name, stat_description FROM mysql.innodb_index_stats WHERE table_name = 't' AND stat_name LIKE 'n_diff%' ORDER BY 1, 2; index_name stat_description PRIMARY a aa f aa f,a dd d dd d,a i1 b i1 b,a i4 e i4 e,a DROP TABLE t; CREATE TABLE t ( a INT, b INT, c INT, d INT, e INT, f INT, PRIMARY KEY (a), INDEX i1 (b), INDEX i2 (c), INDEX i3 (d), INDEX i4 (e) ) ENGINE=INNODB; INSERT INTO t SET a = 1; # combination: abab ALTER TABLE t ADD INDEX i1(f), DROP INDEX i2, RENAME INDEX i1 TO i2; affected rows: 0 info: Records: 0 Duplicates: 0 Warnings: 0 SHOW CREATE TABLE t; Table Create Table t CREATE TABLE `t` ( `a` int(11) NOT NULL, `b` int(11) DEFAULT NULL, `c` int(11) DEFAULT NULL, `d` int(11) DEFAULT NULL, `e` int(11) DEFAULT NULL, `f` int(11) DEFAULT NULL, PRIMARY KEY (`a`), KEY `i2` (`b`), KEY `i3` (`d`), KEY `i4` (`e`), KEY `i1` (`f`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 SELECT t.name AS table_name, i.name AS index_name, f.name AS column_name FROM information_schema.innodb_sys_tables t, information_schema.innodb_sys_indexes i, information_schema.innodb_sys_fields f WHERE t.name LIKE '%/t' AND t.table_id = i.table_id AND i.index_id = f.index_id ORDER BY 1, 2, 3; table_name index_name column_name test/t i1 f test/t i2 b test/t i3 d test/t i4 e test/t PRIMARY a SELECT index_name, stat_description FROM mysql.innodb_index_stats WHERE table_name = 't' AND stat_name LIKE 'n_diff%' ORDER BY 1, 2; index_name stat_description PRIMARY a i1 f i1 f,a i2 b i2 b,a i3 d i3 d,a i4 e i4 e,a DROP TABLE t; CREATE TABLE t ( a INT, b INT, c INT, d INT, e INT, f INT, PRIMARY KEY (a), INDEX i1 (b), INDEX i2 (c), INDEX i3 (d), INDEX i4 (e) ) ENGINE=INNODB; INSERT INTO t SET a = 1; ALTER TABLE t ADD INDEX i1(f), DROP INDEX bb, RENAME INDEX i1 TO bb; ERROR 42000: Can't DROP 'bb'; check that column/key exists ALTER TABLE t ADD INDEX aa(f), DROP INDEX i2, RENAME INDEX aa TO i2; ERROR 42000: Key 'aa' doesn't exist in table 't' ALTER TABLE t ADD INDEX aa(f), DROP INDEX bb, RENAME INDEX aa TO bb; ERROR 42000: Can't DROP 'bb'; check that column/key exists # combination: acbc ALTER TABLE t ADD INDEX i1(f), DROP INDEX cc, RENAME INDEX i2 TO cc; ERROR 42000: Can't DROP 'cc'; check that column/key exists ALTER TABLE t ADD INDEX aa(f), DROP INDEX cc, RENAME INDEX i2 TO cc; ERROR 42000: Can't DROP 'cc'; check that column/key exists ALTER TABLE t ADD INDEX i1(f), DROP INDEX cc, RENAME INDEX bb TO cc; ERROR 42000: Can't DROP 'cc'; check that column/key exists ALTER TABLE t ADD INDEX aa(f), DROP INDEX cc, RENAME INDEX bb TO cc; ERROR 42000: Can't DROP 'cc'; check that column/key exists ALTER TABLE t ADD INDEX i1(f), DROP INDEX i3, RENAME INDEX bb TO i3; ERROR 42000: Key 'bb' doesn't exist in table 't' ALTER TABLE t ADD INDEX aa(f), DROP INDEX i3, RENAME INDEX bb TO i3; ERROR 42000: Key 'bb' doesn't exist in table 't' ALTER TABLE t ADD INDEX i1(f), DROP INDEX i3, RENAME INDEX i2 TO i3; ERROR 42000: Duplicate key name 'i1' ALTER TABLE t ADD INDEX aa(f), DROP INDEX i3, RENAME INDEX i2 TO i3; affected rows: 0 info: Records: 0 Duplicates: 0 Warnings: 0 SHOW CREATE TABLE t; Table Create Table t CREATE TABLE `t` ( `a` int(11) NOT NULL, `b` int(11) DEFAULT NULL, `c` int(11) DEFAULT NULL, `d` int(11) DEFAULT NULL, `e` int(11) DEFAULT NULL, `f` int(11) DEFAULT NULL, PRIMARY KEY (`a`), KEY `i1` (`b`), KEY `i3` (`c`), KEY `i4` (`e`), KEY `aa` (`f`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 SELECT t.name AS table_name, i.name AS index_name, f.name AS column_name FROM information_schema.innodb_sys_tables t, information_schema.innodb_sys_indexes i, information_schema.innodb_sys_fields f WHERE t.name LIKE '%/t' AND t.table_id = i.table_id AND i.index_id = f.index_id ORDER BY 1, 2, 3; table_name index_name column_name test/t aa f test/t i1 b test/t i3 c test/t i4 e test/t PRIMARY a SELECT index_name, stat_description FROM mysql.innodb_index_stats WHERE table_name = 't' AND stat_name LIKE 'n_diff%' ORDER BY 1, 2; index_name stat_description PRIMARY a aa f aa f,a i1 b i1 b,a i3 c i3 c,a i4 e i4 e,a DROP TABLE t; CREATE TABLE t ( a INT, b INT, c INT, d INT, e INT, f INT, PRIMARY KEY (a), INDEX i1 (b), INDEX i2 (c), INDEX i3 (d), INDEX i4 (e) ) ENGINE=INNODB; INSERT INTO t SET a = 1; # combination: cacb ALTER TABLE t ADD INDEX cc(f), DROP INDEX i1, RENAME INDEX cc TO i2; ERROR 42000: Key 'cc' doesn't exist in table 't' ALTER TABLE t ADD INDEX cc(f), DROP INDEX aa, RENAME INDEX cc TO i2; ERROR 42000: Can't DROP 'aa'; check that column/key exists ALTER TABLE t ADD INDEX cc(f), DROP INDEX aa, RENAME INDEX cc TO bb; ERROR 42000: Can't DROP 'aa'; check that column/key exists ALTER TABLE t ADD INDEX cc(f), DROP INDEX i1, RENAME INDEX cc TO bb; ERROR 42000: Key 'cc' doesn't exist in table 't' ALTER TABLE t ADD INDEX i3(f), DROP INDEX i1, RENAME INDEX i3 TO i2; ERROR 42000: Duplicate key name 'i2' ALTER TABLE t ADD INDEX i3(f), DROP INDEX aa, RENAME INDEX i3 TO i2; ERROR 42000: Can't DROP 'aa'; check that column/key exists ALTER TABLE t ADD INDEX i3(f), DROP INDEX aa, RENAME INDEX i3 TO bb; ERROR 42000: Can't DROP 'aa'; check that column/key exists ALTER TABLE t ADD INDEX i3(f), DROP INDEX i1, RENAME INDEX i3 TO bb; affected rows: 0 info: Records: 0 Duplicates: 0 Warnings: 0 SHOW CREATE TABLE t; Table Create Table t CREATE TABLE `t` ( `a` int(11) NOT NULL, `b` int(11) DEFAULT NULL, `c` int(11) DEFAULT NULL, `d` int(11) DEFAULT NULL, `e` int(11) DEFAULT NULL, `f` int(11) DEFAULT NULL, PRIMARY KEY (`a`), KEY `i2` (`c`), KEY `bb` (`d`), KEY `i4` (`e`), KEY `i3` (`f`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 SELECT t.name AS table_name, i.name AS index_name, f.name AS column_name FROM information_schema.innodb_sys_tables t, information_schema.innodb_sys_indexes i, information_schema.innodb_sys_fields f WHERE t.name LIKE '%/t' AND t.table_id = i.table_id AND i.index_id = f.index_id ORDER BY 1, 2, 3; table_name index_name column_name test/t bb d test/t i2 c test/t i3 f test/t i4 e test/t PRIMARY a SELECT index_name, stat_description FROM mysql.innodb_index_stats WHERE table_name = 't' AND stat_name LIKE 'n_diff%' ORDER BY 1, 2; index_name stat_description PRIMARY a bb d bb d,a i2 c i2 c,a i3 f i3 f,a i4 e i4 e,a DROP TABLE t; CREATE TABLE t ( a INT, b INT, c INT, d INT, e INT, f INT, PRIMARY KEY (a), INDEX i1 (b), INDEX i2 (c), INDEX i3 (d), INDEX i4 (e) ) ENGINE=INNODB; INSERT INTO t SET a = 1; # combination: ccab ALTER TABLE t ADD INDEX cc(f), DROP INDEX cc, RENAME INDEX i1 TO i2; ERROR 42000: Can't DROP 'cc'; check that column/key exists ALTER TABLE t ADD INDEX cc(f), DROP INDEX cc, RENAME INDEX i1 TO bb; ERROR 42000: Can't DROP 'cc'; check that column/key exists ALTER TABLE t ADD INDEX cc(f), DROP INDEX cc, RENAME INDEX aa TO i2; ERROR 42000: Can't DROP 'cc'; check that column/key exists ALTER TABLE t ADD INDEX cc(f), DROP INDEX cc, RENAME INDEX aa TO bb; ERROR 42000: Can't DROP 'cc'; check that column/key exists ALTER TABLE t ADD INDEX i3(f), DROP INDEX cc, RENAME INDEX aa TO i2; ERROR 42000: Can't DROP 'cc'; check that column/key exists ALTER TABLE t ADD INDEX i3(f), DROP INDEX cc, RENAME INDEX aa TO bb; ERROR 42000: Can't DROP 'cc'; check that column/key exists ALTER TABLE t ADD INDEX i3(f), DROP INDEX i3, RENAME INDEX i1 TO i2; ERROR 42000: Duplicate key name 'i2' ALTER TABLE t ADD INDEX i3(f), DROP INDEX i3, RENAME INDEX i1 TO bb; affected rows: 0 info: Records: 0 Duplicates: 0 Warnings: 0 SHOW CREATE TABLE t; Table Create Table t CREATE TABLE `t` ( `a` int(11) NOT NULL, `b` int(11) DEFAULT NULL, `c` int(11) DEFAULT NULL, `d` int(11) DEFAULT NULL, `e` int(11) DEFAULT NULL, `f` int(11) DEFAULT NULL, PRIMARY KEY (`a`), KEY `bb` (`b`), KEY `i2` (`c`), KEY `i4` (`e`), KEY `i3` (`f`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 SELECT t.name AS table_name, i.name AS index_name, f.name AS column_name FROM information_schema.innodb_sys_tables t, information_schema.innodb_sys_indexes i, information_schema.innodb_sys_fields f WHERE t.name LIKE '%/t' AND t.table_id = i.table_id AND i.index_id = f.index_id ORDER BY 1, 2, 3; table_name index_name column_name test/t bb b test/t i2 c test/t i3 f test/t i4 e test/t PRIMARY a SELECT index_name, stat_description FROM mysql.innodb_index_stats WHERE table_name = 't' AND stat_name LIKE 'n_diff%' ORDER BY 1, 2; index_name stat_description PRIMARY a bb b bb b,a i2 c i2 c,a i3 f i3 f,a i4 e i4 e,a DROP TABLE t; CREATE TABLE t ( a INT, b INT, c INT, d INT, e INT, f INT, PRIMARY KEY (a), INDEX i1 (b), INDEX i2 (c), INDEX i3 (d), INDEX i4 (e) ) ENGINE=INNODB; INSERT INTO t SET a = 1; ALTER TABLE t RENAME INDEX i1 TO x; affected rows: 0 info: Records: 0 Duplicates: 0 Warnings: 0 SHOW CREATE TABLE t; Table Create Table t CREATE TABLE `t` ( `a` int(11) NOT NULL, `b` int(11) DEFAULT NULL, `c` int(11) DEFAULT NULL, `d` int(11) DEFAULT NULL, `e` int(11) DEFAULT NULL, `f` int(11) DEFAULT NULL, PRIMARY KEY (`a`), KEY `x` (`b`), KEY `i2` (`c`), KEY `i3` (`d`), KEY `i4` (`e`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 SELECT t.name AS table_name, i.name AS index_name, f.name AS column_name FROM information_schema.innodb_sys_tables t, information_schema.innodb_sys_indexes i, information_schema.innodb_sys_fields f WHERE t.name LIKE '%/t' AND t.table_id = i.table_id AND i.index_id = f.index_id ORDER BY 1, 2, 3; table_name index_name column_name test/t i2 c test/t i3 d test/t i4 e test/t PRIMARY a test/t x b SELECT index_name, stat_description FROM mysql.innodb_index_stats WHERE table_name = 't' AND stat_name LIKE 'n_diff%' ORDER BY 1, 2; index_name stat_description PRIMARY a i2 c i2 c,a i3 d i3 d,a i4 e i4 e,a x b x b,a DROP TABLE t; CREATE TABLE t ( a INT, b INT, c INT, d INT, e INT, f INT, PRIMARY KEY (a), INDEX i1 (b), INDEX i2 (c), INDEX i3 (d), INDEX i4 (e) ) ENGINE=INNODB; INSERT INTO t SET a = 1; ALTER TABLE t RENAME INDEX i1 TO i2; ERROR 42000: Duplicate key name 'i2' ALTER TABLE t RENAME INDEX foo TO i1; ERROR 42000: Key 'foo' doesn't exist in table 't' ALTER TABLE t ADD INDEX i9 (f), RENAME INDEX i1 TO i8; affected rows: 0 info: Records: 0 Duplicates: 0 Warnings: 0 SHOW CREATE TABLE t; Table Create Table t CREATE TABLE `t` ( `a` int(11) NOT NULL, `b` int(11) DEFAULT NULL, `c` int(11) DEFAULT NULL, `d` int(11) DEFAULT NULL, `e` int(11) DEFAULT NULL, `f` int(11) DEFAULT NULL, PRIMARY KEY (`a`), KEY `i8` (`b`), KEY `i2` (`c`), KEY `i3` (`d`), KEY `i4` (`e`), KEY `i9` (`f`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 SELECT t.name AS table_name, i.name AS index_name, f.name AS column_name FROM information_schema.innodb_sys_tables t, information_schema.innodb_sys_indexes i, information_schema.innodb_sys_fields f WHERE t.name LIKE '%/t' AND t.table_id = i.table_id AND i.index_id = f.index_id ORDER BY 1, 2, 3; table_name index_name column_name test/t i2 c test/t i3 d test/t i4 e test/t i8 b test/t i9 f test/t PRIMARY a SELECT index_name, stat_description FROM mysql.innodb_index_stats WHERE table_name = 't' AND stat_name LIKE 'n_diff%' ORDER BY 1, 2; index_name stat_description PRIMARY a i2 c i2 c,a i3 d i3 d,a i4 e i4 e,a i8 b i8 b,a i9 f i9 f,a DROP TABLE t; CREATE TABLE t ( a INT, b INT, c INT, d INT, e INT, f INT, PRIMARY KEY (a), INDEX i1 (b), INDEX i2 (c), INDEX i3 (d), INDEX i4 (e) ) ENGINE=INNODB; INSERT INTO t SET a = 1; ALTER TABLE t ADD INDEX i1 (f), RENAME INDEX i1 TO i9; affected rows: 0 info: Records: 0 Duplicates: 0 Warnings: 0 SHOW CREATE TABLE t; Table Create Table t CREATE TABLE `t` ( `a` int(11) NOT NULL, `b` int(11) DEFAULT NULL, `c` int(11) DEFAULT NULL, `d` int(11) DEFAULT NULL, `e` int(11) DEFAULT NULL, `f` int(11) DEFAULT NULL, PRIMARY KEY (`a`), KEY `i9` (`b`), KEY `i2` (`c`), KEY `i3` (`d`), KEY `i4` (`e`), KEY `i1` (`f`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 SELECT t.name AS table_name, i.name AS index_name, f.name AS column_name FROM information_schema.innodb_sys_tables t, information_schema.innodb_sys_indexes i, information_schema.innodb_sys_fields f WHERE t.name LIKE '%/t' AND t.table_id = i.table_id AND i.index_id = f.index_id ORDER BY 1, 2, 3; table_name index_name column_name test/t i1 f test/t i2 c test/t i3 d test/t i4 e test/t i9 b test/t PRIMARY a SELECT index_name, stat_description FROM mysql.innodb_index_stats WHERE table_name = 't' AND stat_name LIKE 'n_diff%' ORDER BY 1, 2; index_name stat_description PRIMARY a i1 f i1 f,a i2 c i2 c,a i3 d i3 d,a i4 e i4 e,a i9 b i9 b,a DROP TABLE t; CREATE TABLE t ( a INT, b INT, c INT, d INT, e INT, f INT, PRIMARY KEY (a), INDEX i1 (b), INDEX i2 (c), INDEX i3 (d), INDEX i4 (e) ) ENGINE=INNODB; INSERT INTO t SET a = 1; ALTER TABLE t ADD INDEX foo (f), RENAME INDEX i1 TO foo; ERROR 42000: Duplicate key name 'foo' ALTER TABLE t ADD INDEX i1 (f), RENAME INDEX i1 TO foo, DROP INDEX i1; ERROR 42000: Key 'i1' doesn't exist in table 't' ALTER TABLE t ADD INDEX i1 (f), RENAME INDEX i1 TO foo, DROP INDEX foo; ERROR 42000: Can't DROP 'foo'; check that column/key exists ALTER TABLE t ADD INDEX foo (f), RENAME INDEX foo TO bar, DROP INDEX foo; ERROR 42000: Can't DROP 'foo'; check that column/key exists ALTER TABLE t RENAME INDEX i1 TO x, RENAME INDEX i2 TO x; ERROR 42000: Duplicate key name 'x' ALTER TABLE t RENAME INDEX i1 TO x, RENAME INDEX i1 TO y; ERROR 42000: Key 'i1' doesn't exist in table 't' ALTER TABLE t RENAME INDEX i1 TO x, RENAME INDEX i1 TO x; ERROR 42000: Key 'i1' doesn't exist in table 't' SHOW CREATE TABLE t; Table Create Table t CREATE TABLE `t` ( `a` int(11) NOT NULL, `b` int(11) DEFAULT NULL, `c` int(11) DEFAULT NULL, `d` int(11) DEFAULT NULL, `e` int(11) DEFAULT NULL, `f` int(11) DEFAULT NULL, PRIMARY KEY (`a`), KEY `i1` (`b`), KEY `i2` (`c`), KEY `i3` (`d`), KEY `i4` (`e`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 SELECT t.name AS table_name, i.name AS index_name, f.name AS column_name FROM information_schema.innodb_sys_tables t, information_schema.innodb_sys_indexes i, information_schema.innodb_sys_fields f WHERE t.name LIKE '%/t' AND t.table_id = i.table_id AND i.index_id = f.index_id ORDER BY 1, 2, 3; table_name index_name column_name test/t i1 b test/t i2 c test/t i3 d test/t i4 e test/t PRIMARY a SELECT index_name, stat_description FROM mysql.innodb_index_stats WHERE table_name = 't' AND stat_name LIKE 'n_diff%' ORDER BY 1, 2; index_name stat_description PRIMARY a i1 b i1 b,a i2 c i2 c,a i3 d i3 d,a i4 e i4 e,a DROP TABLE t; CREATE TABLE t ( c1 INT NOT NULL, c2 INT NOT NULL, c3 INT, c4 INT, PRIMARY KEY (c1), INDEX i1 (c3), INDEX i2 (c4) ) ENGINE=INNODB; INSERT INTO t SET c1=1, c2=2; ALTER TABLE t DROP PRIMARY KEY, ADD PRIMARY KEY (c2), RENAME INDEX i1 TO x; affected rows: 0 info: Records: 0 Duplicates: 0 Warnings: 0 SHOW CREATE TABLE t; Table Create Table t CREATE TABLE `t` ( `c1` int(11) NOT NULL, `c2` int(11) NOT NULL, `c3` int(11) DEFAULT NULL, `c4` int(11) DEFAULT NULL, PRIMARY KEY (`c2`), KEY `x` (`c3`), KEY `i2` (`c4`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 SELECT t.name AS table_name, i.name AS index_name, f.name AS column_name FROM information_schema.innodb_sys_tables t, information_schema.innodb_sys_indexes i, information_schema.innodb_sys_fields f WHERE t.name LIKE '%/t' AND t.table_id = i.table_id AND i.index_id = f.index_id ORDER BY 1, 2, 3; table_name index_name column_name test/t i2 c4 test/t PRIMARY c2 test/t x c3 SELECT index_name, stat_description FROM mysql.innodb_index_stats WHERE table_name = 't' AND stat_name LIKE 'n_diff%' ORDER BY 1, 2; index_name stat_description PRIMARY c2 i2 c4 i2 c4,c2 x c3 x c3,c2 ALTER TABLE t RENAME INDEX i2 TO y, ROW_FORMAT=REDUNDANT; affected rows: 0 info: Records: 0 Duplicates: 0 Warnings: 0 SHOW CREATE TABLE t; Table Create Table t CREATE TABLE `t` ( `c1` int(11) NOT NULL, `c2` int(11) NOT NULL, `c3` int(11) DEFAULT NULL, `c4` int(11) DEFAULT NULL, PRIMARY KEY (`c2`), KEY `x` (`c3`), KEY `y` (`c4`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 ROW_FORMAT=REDUNDANT SELECT t.name AS table_name, i.name AS index_name, f.name AS column_name FROM information_schema.innodb_sys_tables t, information_schema.innodb_sys_indexes i, information_schema.innodb_sys_fields f WHERE t.name LIKE '%/t' AND t.table_id = i.table_id AND i.index_id = f.index_id ORDER BY 1, 2, 3; table_name index_name column_name test/t PRIMARY c2 test/t x c3 test/t y c4 SELECT index_name, stat_description FROM mysql.innodb_index_stats WHERE table_name = 't' AND stat_name LIKE 'n_diff%' ORDER BY 1, 2; index_name stat_description PRIMARY c2 x c3 x c3,c2 y c4 y c4,c2 DROP TABLE t; CREATE TABLE t ( c1 INT NOT NULL, c2 INT, c3 INT, INDEX i1 (c2), INDEX i2 (c3) ) ENGINE=INNODB; INSERT INTO t SET c1=1; ALTER TABLE t ADD PRIMARY KEY (c1), RENAME INDEX i1 TO x; affected rows: 0 info: Records: 0 Duplicates: 0 Warnings: 0 SHOW CREATE TABLE t; Table Create Table t CREATE TABLE `t` ( `c1` int(11) NOT NULL, `c2` int(11) DEFAULT NULL, `c3` int(11) DEFAULT NULL, PRIMARY KEY (`c1`), KEY `x` (`c2`), KEY `i2` (`c3`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 SELECT t.name AS table_name, i.name AS index_name, f.name AS column_name FROM information_schema.innodb_sys_tables t, information_schema.innodb_sys_indexes i, information_schema.innodb_sys_fields f WHERE t.name LIKE '%/t' AND t.table_id = i.table_id AND i.index_id = f.index_id ORDER BY 1, 2, 3; table_name index_name column_name test/t i2 c3 test/t PRIMARY c1 test/t x c2 SELECT index_name, stat_description FROM mysql.innodb_index_stats WHERE table_name = 't' AND stat_name LIKE 'n_diff%' ORDER BY 1, 2; index_name stat_description PRIMARY c1 i2 c3 i2 c3,c1 x c2 x c2,c1 DROP TABLE t; CREATE TABLE t (a INT, INDEX iiiii (a)) ENGINE=INNODB; INSERT INTO t SET a=NULL; ALTER TABLE t RENAME INDEX iiiii TO i; affected rows: 0 info: Records: 0 Duplicates: 0 Warnings: 0 ALTER TABLE t RENAME INDEX i TO iiiii; affected rows: 0 info: Records: 0 Duplicates: 0 Warnings: 0 ALTER TABLE t RENAME INDEX iiiii TO i; affected rows: 0 info: Records: 0 Duplicates: 0 Warnings: 0 ALTER TABLE t RENAME INDEX i TO iiiii; affected rows: 0 info: Records: 0 Duplicates: 0 Warnings: 0 DROP TABLE t; CREATE TABLE t (a INT, b INT, PRIMARY KEY (a), INDEX i1 (b)) ENGINE=INNODB; INSERT INTO t SET a=1; RENAME TABLE mysql.innodb_index_stats TO mysql.innodb_index_stats_; ALTER TABLE t RENAME INDEX i1 TO i7; affected rows: 0 info: Records: 0 Duplicates: 0 Warnings: 1 Warnings: Warning 1025 Error renaming an index of table 't' from 'i1' to 'i7' in InnoDB persistent statistics storage: Persistent statistics do not exist RENAME TABLE mysql.innodb_index_stats_ TO mysql.innodb_index_stats; SHOW CREATE TABLE t; Table Create Table t CREATE TABLE `t` ( `a` int(11) NOT NULL, `b` int(11) DEFAULT NULL, PRIMARY KEY (`a`), KEY `i7` (`b`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 SELECT t.name AS table_name, i.name AS index_name, f.name AS column_name FROM information_schema.innodb_sys_tables t, information_schema.innodb_sys_indexes i, information_schema.innodb_sys_fields f WHERE t.name LIKE '%/t' AND t.table_id = i.table_id AND i.index_id = f.index_id ORDER BY 1, 2, 3; table_name index_name column_name test/t i7 b test/t PRIMARY a SELECT index_name, stat_description FROM mysql.innodb_index_stats WHERE table_name = 't' AND stat_name LIKE 'n_diff%' ORDER BY 1, 2; index_name stat_description PRIMARY a i1 b i1 b,a DROP TABLE t;