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MDEV-17599 ALTER TABLE DROP CONSTRAINT does not work for foreign keys.

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The list of table constraints doesn't include foreign keys and uniques.
So we replace DROP CONSTRAINT with DROP [FOREIGN] KEY in this case.
This commit is contained in:
Alexey Botchkov
2019-02-05 11:24:19 +04:00
parent 227379988e
commit f53e795250
4 changed files with 131 additions and 2 deletions
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49
mysql-test/r/alter_table.result
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@ -2456,5 +2456,54 @@ ERROR 23000: Duplicate entry '1' for key 'i'
UNLOCK TABLES;
DROP TABLE t1;
#
# MDEV-17599 ALTER TABLE DROP CONSTRAINT does not work for foreign keys.
#
CREATE TABLE t1(id INT PRIMARY KEY, c1 INT) ENGINE= INNODB;
CREATE TABLE t2(id INT PRIMARY KEY, c1 INT, c2 INT NOT NULL,
CONSTRAINT sid FOREIGN KEY (`c1`) REFERENCES t1 (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION,
CONSTRAINT UNIQUE `ui`(c2)) ENGINE= INNODB;
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`id` int(11) NOT NULL,
`c1` int(11) DEFAULT NULL,
`c2` int(11) NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `ui` (`c2`),
KEY `sid` (`c1`),
CONSTRAINT `sid` FOREIGN KEY (`c1`) REFERENCES `t1` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION
) ENGINE=InnoDB DEFAULT CHARSET=latin1
ALTER TABLE t2 DROP CONSTRAINT sid;
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`id` int(11) NOT NULL,
`c1` int(11) DEFAULT NULL,
`c2` int(11) NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `ui` (`c2`),
KEY `sid` (`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
ALTER TABLE t2 DROP CONSTRAINT ui;
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`id` int(11) NOT NULL,
`c1` int(11) DEFAULT NULL,
`c2` int(11) NOT NULL,
PRIMARY KEY (`id`),
KEY `sid` (`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
ALTER TABLE t2 DROP CONSTRAINT PRIMARY KEY;
SHOW CREATE TABLE t2;
Table Create Table
t2 CREATE TABLE `t2` (
`id` int(11) NOT NULL,
`c1` int(11) DEFAULT NULL,
`c2` int(11) NOT NULL,
KEY `sid` (`c1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
DROP TABLE t2, t1;
#
# End of 10.2 tests
#