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CREATE TABLE t1 (x INT NOT NULL UNIQUE KEY) ENGINE=InnoDB;
INSERT INTO t1 VALUES(5);
SET GLOBAL innodb_log_checkpoint_now=TRUE;
SET DEBUG_SYNC='commit_cache_rebuild SIGNAL ready WAIT_FOR finish';
ALTER TABLE t1 ADD PRIMARY KEY(x);
connect con1,localhost,root,,;
SET DEBUG_SYNC='now WAIT_FOR ready';
SET GLOBAL innodb_log_checkpoint_now=TRUE;
SET DEBUG_SYNC='now SIGNAL finish';
disconnect con1;
connection default;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`x` int(11) NOT NULL,
PRIMARY KEY (`x`),
UNIQUE KEY `x` (`x`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
DROP TABLE t1;
SET DEBUG_SYNC='RESET';
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