CREATE TABLE t1 (f1 INT NOT NULL, f2 INT NOT NULL,
UNIQUE KEY uidx2(f1,f2),
UNIQUE KEY uidx1(f2)) ENGINE=InnoDB;
INSERT INTO t1 VALUES(1, 1);
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `f1` int(11) NOT NULL,
  `f2` int(11) NOT NULL,
  UNIQUE KEY `uidx2` (`f1`,`f2`),
  UNIQUE KEY `uidx1` (`f2`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
SET DEBUG_SYNC = 'innodb_inplace_alter_table_enter
		  SIGNAL conc_dml WAIT_FOR go_ahead';
ALTER TABLE t1 CHANGE COLUMN f1 f11 INT, ALGORITHM=INPLACE;
connect  con1,localhost,root,,;
SET DEBUG_SYNC = 'now WAIT_FOR conc_dml';
DELETE FROM t1;
SET DEBUG_SYNC = 'now SIGNAL go_ahead';
connection default;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `f11` int(11) DEFAULT NULL,
  `f2` int(11) NOT NULL,
  UNIQUE KEY `uidx1` (`f2`),
  UNIQUE KEY `uidx2` (`f11`,`f2`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
DROP TABLE t1;
CREATE TABLE t1(f1 INT, f2 INT,
PRIMARY KEY(f1, f2),
UNIQUE INDEX uidx2 (f1, f2),
UNIQUE INDEX uidx1 (f2))ENGINE=InnoDB;
INSERT INTO t1 VALUES(2, 2);
ALTER TABLE t1 DROP PRIMARY KEY;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `f1` int(11) NOT NULL,
  `f2` int(11) NOT NULL,
  UNIQUE KEY `uidx2` (`f1`,`f2`),
  UNIQUE KEY `uidx1` (`f2`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
SET DEBUG_SYNC = 'innodb_inplace_alter_table_enter
		  SIGNAL conc_dml WAIT_FOR go_ahead';
ALTER TABLE t1 CHANGE COLUMN f1 f11 INT, ALGORITHM=INPLACE;
connection con1;
SET DEBUG_SYNC = 'now WAIT_FOR conc_dml';
INSERT INTO t1 VALUES(1, 1), (1, 1);
ERROR 23000: Duplicate entry '1-1' for key 'uidx2'
SET DEBUG_SYNC = 'now SIGNAL go_ahead';
connection default;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `f11` int(11) DEFAULT NULL,
  `f2` int(11) NOT NULL,
  UNIQUE KEY `uidx1` (`f2`),
  UNIQUE KEY `uidx2` (`f11`,`f2`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
DROP TABLE t1;
SET SQL_MODE= strict_trans_tables;
CREATE TABLE t1(a INT UNIQUE) ENGINE=InnoDB;
INSERT INTO t1 VALUES(1);
SET DEBUG_SYNC='row_log_table_apply1_before SIGNAL dml WAIT_FOR dml_done';
ALTER TABLE t1 MODIFY COLUMN a INT NOT NULL;
connection con1;
SET DEBUG_SYNC='now WAIT_FOR dml';
BEGIN;
INSERT INTO t1 SET a=NULL;
ROLLBACK;
set DEBUG_SYNC='now SIGNAL dml_done';
connection default;
ERROR 22004: Invalid use of NULL value
DROP TABLE t1;
disconnect con1;
SET DEBUG_SYNC="RESET";
SET SQL_MODE=DEFAULT;
CREATE TABLE t1(f1 INT NOT NULL, f2 INT NOT NULL, PRIMARY KEY(f1, f2),
UNIQUE KEY(f2))ENGINE=InnoDB;
ALTER TABLE t1 DROP PRIMARY KEY;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `f1` int(11) NOT NULL,
  `f2` int(11) NOT NULL,
  UNIQUE KEY `f2` (`f2`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
DROP TABLE t1;
CREATE TABLE t1(f1 INT NOT NULL, f2 INT NOT NULL,
UNIQUE KEY(f2), UNIQUE KEY(f2))ENGINE=InnoDB;
Warnings:
Note	1831	Duplicate index `f2_2`. This is deprecated and will be disallowed in a future release
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `f1` int(11) NOT NULL,
  `f2` int(11) NOT NULL,
  UNIQUE KEY `f2` (`f2`),
  UNIQUE KEY `f2_2` (`f2`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
ALTER TABLE t1 DROP INDEX f2, ALGORITHM=INPLACE;
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `f1` int(11) NOT NULL,
  `f2` int(11) NOT NULL,
  UNIQUE KEY `f2_2` (`f2`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
DROP TABLE t1;