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MDEV-8524: Improve error messaging when there is duplicate key or foreign key names

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Added better error message that will be printed when foreign key
constraint name in create table is not unique in database.
This commit is contained in:
Jan Lindström
2015-07-29 05:58:45 +03:00
parent 392df76bc3
commit e05cd97b8a
8 changed files with 350 additions and 2 deletions
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20
mysql-test/suite/innodb/r/innodb-fk-warnings.result Normal file
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CREATE TABLE t1 (
id int(11) NOT NULL PRIMARY KEY,
a int(11) NOT NULL,
b int(11) NOT NULL,
c int not null,
CONSTRAINT test FOREIGN KEY (b) REFERENCES t1 (id)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
CREATE TABLE t2 (
id int(11) NOT NULL PRIMARY KEY,
a int(11) NOT NULL,
b int(11) NOT NULL,
c int not null,
CONSTRAINT test FOREIGN KEY (b) REFERENCES t2 (id)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
ERROR HY000: Can't create table 'test.t2' (errno: 121)
show warnings;
Level Code Message
Warning 121 InnoDB: foreign key constraint name `test/test` already exists on data dictionary. Foreign key constraint names need to be unique in database. Error in foreign key definition: CONSTRAINT `test` FOREIGN KEY (`b`) REFERENCES `test`.`t2` (`id`).
Error 1005 Can't create table 'test.t2' (errno: 121)
drop table t1;