37 lines
1.3 KiB
Plaintext
37 lines
1.3 KiB
Plaintext
SET DEBUG_SYNC='RESET';
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CREATE TABLE t1 (c1 INT PRIMARY KEY, c2 INT, INDEX(c2)) ENGINE = InnoDB;
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CREATE TABLE t2 (
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c2 INT PRIMARY KEY,
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CONSTRAINT t2c2 FOREIGN KEY (c2) REFERENCES t1 (c2))
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ENGINE = InnoDB;
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DROP INDEX c2 ON t1;
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ERROR HY000: Cannot drop index 'c2': needed in a foreign key constraint
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DROP TABLE t2;
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SET DEBUG_SYNC = 'innodb_after_inplace_alter_table SIGNAL drop WAIT_FOR fk';
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DROP INDEX c2 ON t1;
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# Establish session con1 (user=root)
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# Session con1
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SET DEBUG_SYNC = 'now WAIT_FOR drop';
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CREATE TABLE t2 (
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c2 INT PRIMARY KEY,
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CONSTRAINT t2c2 FOREIGN KEY (c2) REFERENCES t1 (c2))
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ENGINE = InnoDB;
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# Establish session con2 (user=root)
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# After WL#6049 CREATE TABLE t2 must be blocked while trying
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# to acquire exclusive metadata lock on t1.
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SET DEBUG_SYNC = 'now SIGNAL fk';
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# Switching to connection con1.
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# So no chance for CREATE TABLE t2 to sneak before DROP INDEX
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# is committed in and succeed.
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/* reap */ CREATE TABLE t2 ...
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ERROR HY000: Failed to add the foreign key constraint. Missing index for constraint 't2c2' in the referenced table 't1'
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# Session default
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/* reap */ DROP INDEX c2 ON t1;
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CREATE TABLE t2 (
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c2 INT PRIMARY KEY,
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CONSTRAINT t2c2 FOREIGN KEY (c2) REFERENCES t1 (c2))
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ENGINE = InnoDB;
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ERROR HY000: Failed to add the foreign key constraint. Missing index for constraint 't2c2' in the referenced table 't1'
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SET DEBUG_SYNC='RESET';
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DROP TABLE t1;
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