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5bb31bc882
mysql_prepare_alter_table(): Alter table should check whether foreign key exists when it expected to exists and report the error in early stage dict_foreign_parse_drop_constraints(): Don't throw error if the foreign key constraints doesn't exist when if exists is given in the statement.
44 lines
1.8 KiB
Text
44 lines
1.8 KiB
Text
#
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# MDEV-22230 : Unexpected ER_ERROR_ON_RENAME upon DROP
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# non-existing FOREIGN KEY
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#
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CREATE TABLE t1 (a INT) ENGINE=InnoDB;
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ALTER TABLE t1 DROP FOREIGN KEY x, ALGORITHM=COPY;
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ERROR 42000: Can't DROP FOREIGN KEY `x`; check that it exists
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ALTER TABLE t1 DROP FOREIGN KEY x, ALGORITHM=INPLACE;
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ERROR 42000: Can't DROP FOREIGN KEY `x`; check that it exists
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DROP TABLE t1;
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CREATE TABLE t1 (a INT, KEY(a)) ENGINE=InnoDB;
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CREATE TABLE t2 (a INT, FOREIGN KEY fk_id (a) REFERENCES t1(a))ENGINE=InnoDB;
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CREATE TABLE t3 (a INT, FOREIGN KEY fk_1 (a) REFERENCES t1(a))ENGINE=InnoDB;
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ALTER TABLE t3 DROP FOREIGN KEY IF EXISTS fk_id;
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Warnings:
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Note 1091 Can't DROP FOREIGN KEY `fk_id`; check that it exists
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DROP TABLE t3, t2;
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ALTER TABLE t1 MODIFY COLUMN a VARCHAR(2), DROP FOREIGN KEY IF EXISTS x;
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Warnings:
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Note 1091 Can't DROP FOREIGN KEY `x`; check that it exists
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DROP TABLE t1;
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CREATE DATABASE best;
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CREATE TABLE best.t1(f1 INT, KEY(f1))ENGINE=InnoDB;
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CREATE TABLE best.t2(f1 INT, FOREIGN KEY foo(f1) REFERENCES t1(f1))ENGINE=InnoDB;
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CREATE TABLE t1(f1 INT, KEY(f1))ENGINE=InnoDB;
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CREATE TABLE t2(f1 INT, FOREIGN KEY foo(f1) REFERENCES t1(f1))ENGINE=InnoDB;
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ALTER TABLE t2 DROP FOREIGN KEY foo;
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ALTER TABLE t2 DROP FOREIGN KEY foo;
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ERROR 42000: Can't DROP FOREIGN KEY `foo`; check that it exists
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ALTER TABLE t2 DROP FOREIGN KEY IF EXISTS foo;
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Warnings:
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Note 1091 Can't DROP FOREIGN KEY `foo`; check that it exists
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SHOW CREATE TABLE best.t2;
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Table Create Table
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t2 CREATE TABLE `t2` (
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`f1` int(11) DEFAULT NULL,
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KEY `foo` (`f1`),
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CONSTRAINT `foo` FOREIGN KEY (`f1`) REFERENCES `t1` (`f1`)
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) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
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SELECT * FROM INFORMATION_SCHEMA.INNODB_SYS_FOREIGN;
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ID FOR_NAME REF_NAME N_COLS TYPE
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best/foo best/t2 best/t1 1 0
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DROP TABLE best.t2, best.t1, t2, t1;
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DROP DATABASE best;
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