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cffbb17480
Before MySQL 4.0.18, user-specified constraint names were ignored. Starting with MySQL 4.0.18, the specified constraint name was prepended with the schema name and '/'. Now we are transforming into a format where the constraint name is prepended with the dict_table_t::name and the impossible UTF-8 sequence 0xff. Generated constraint names will be ASCII decimal numbers. On upgrade, old FOREIGN KEY constraint names will be displayed without any schema name prefix. They will be updated to the new format on DDL operations. dict_foreign_t::sql_id(): Return the SQL constraint name without any schemaname/tablename\377 or schemaname/ prefix. row_rename_table_for_mysql(), dict_table_rename_in_cache(): Simplify the logic: Just rename constraints to the new format. dict_table_get_foreign_id(): Replaces dict_table_get_highest_foreign_id(). innobase_get_foreign_key_info(): Let my_error() refer to erroneous anonymous constraints as "(null)". row_delete_constraint(): Try to drop all 3 constraint name variants. Reviewed by: Thirunarayanan Balathandayuthapani Tested by: Matthias Leich
156 lines
8.4 KiB
Text
156 lines
8.4 KiB
Text
call mtr.add_suppression("InnoDB: In ALTER TABLE .* has or is referenced in foreign key constraints which are not compatible with the new table definition.");
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# modify child column NOT NULL on UPDATE CASCADE..parent column NULL
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CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
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CREATE TABLE t2(f1 INT, FOREIGN KEY(f1) REFERENCES t1(f2) ON UPDATE CASCADE)ENGINE=InnoDB;
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ALTER TABLE t2 MODIFY COLUMN f1 INT NOT NULL;
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ERROR HY000: Column 'f1' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
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DROP TABLE t2, t1;
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# modify child column NOT NULL ON DELETE CASCADE..parent column NULL
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CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
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CREATE TABLE t2(f1 INT, FOREIGN KEY(f1) REFERENCES t1(f2) ON DELETE CASCADE)ENGINE=InnoDB;
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ALTER TABLE t2 MODIFY COLUMN f1 INT NOT NULL;
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DROP TABLE t2, t1;
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# modify child column NOT NULL ON UPDATE SET NULL
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CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
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CREATE TABLE t2(f1 INT, f2 INT, FOREIGN KEY(f1) REFERENCES t1(f1) ON UPDATE SET NULL)ENGINE=InnoDB;
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ALTER TABLE t2 MODIFY COLUMN f1 INT NOT NULL;
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ERROR HY000: Column 'f1' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
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DROP TABLE t2, t1;
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# modify child column NOT NULL ON DELETE SET NULL
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CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
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CREATE TABLE t2(f1 INT, f2 INT, FOREIGN KEY (f2) REFERENCES t1(f2) ON DELETE SET NULL)ENGINE=InnoDB;
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ALTER TABLE t2 MODIFY COLUMN f2 INT NOT NULL;
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ERROR HY000: Column 'f2' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
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DROP TABLE t2, t1;
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# modify child column NOT NULL ON UPDATE RESTRICT..parent column NULL
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CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
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CREATE TABLE t2(f1 INT, f2 INT, FOREIGN KEY (f2) REFERENCES t1(f2) ON UPDATE RESTRICT)ENGINE=InnoDB;
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ALTER TABLE t2 MODIFY COLUMN f2 INT NOT NULL;
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DROP TABLE t2, t1;
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# modify child column NOT NULL ON DELETE RESTRICT..parent column NULL
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CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
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CREATE TABLE t2(f1 INT, f2 INT, FOREIGN KEY (f2) REFERENCES t1(f2) ON DELETE RESTRICT)ENGINE=InnoDB;
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ALTER TABLE t2 MODIFY COLUMN f2 INT NOT NULL;
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DROP TABLE t2, t1;
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# modify child column NOT NULL ON UPDATE NO ACTION..PARENT COLUMN NULL
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CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
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CREATE TABLE t2(f1 INT, f2 INT, FOREIGN KEY (f2) REFERENCES t1(f2) ON UPDATE NO ACTION)ENGINE=InnoDB;
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ALTER TABLE t2 MODIFY COLUMN f2 INT NOT NULL;
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DROP TABLE t2, t1;
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# modify child column NOT NULL ON DELETE NO ACTION..PARENT COLUMN NULL
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CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
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CREATE TABLE t2(f1 INT, f2 INT, FOREIGN KEY (f2) REFERENCES t1(f2) ON DELETE NO ACTION)ENGINE=InnoDB;
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ALTER TABLE t2 MODIFY COLUMN f2 INT NOT NULL;
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DROP TABLE t2, t1;
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# modify parent column NULL ON UPDATE CASCADE child column NOT NULL
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CREATE TABLE `t#1`(f1 INT, f2 INT NOT NULL, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
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CREATE TABLE `t#2`(f1 INT NOT NULL,
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FOREIGN KEY(f1) REFERENCES `t#1`(f2)
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ON UPDATE CASCADE)ENGINE=InnoDB;
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ALTER TABLE `t#1` MODIFY COLUMN f2 INT;
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ERROR HY000: Cannot change column 'f2': used in a foreign key constraint '1' of table 'test.t#2'
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DROP TABLE `t#2`, `t#1`;
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# modify parent column NULL ON DELETE CASCADE child column NOT NULL
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CREATE TABLE t1(f1 INT, f2 INT NOT NULL, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
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CREATE TABLE t2(f1 INT NOT NULL, FOREIGN KEY(f1) REFERENCES t1(f2) ON DELETE CASCADE)ENGINE=InnoDB;
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ALTER TABLE t1 MODIFY COLUMN f2 INT;
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DROP TABLE t2, t1;
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# modify parent column NULL ON UPDATE SET NULL child column NOT NULL
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CREATE TABLE t1(f1 INT, f2 INT NOT NULL, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
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CREATE TABLE t2(f1 INT NOT NULL, FOREIGN KEY(f1) REFERENCES t1(f2) ON UPDATE SET NULL)ENGINE=InnoDB;
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ERROR HY000: Can't create table `test`.`t2` (errno: 150 "Foreign key constraint is incorrectly formed")
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DROP TABLE t1;
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# modify parent column NULL ON DELETE SET NULL child NOT NULL
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CREATE TABLE t1(f1 INT, f2 INT NOT NULL, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
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CREATE TABLE t2(f1 INT NOT NULL, FOREIGN KEY(f1) REFERENCES t1(f2) ON DELETE SET NULL)ENGINE=InnoDB;
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ERROR HY000: Can't create table `test`.`t2` (errno: 150 "Foreign key constraint is incorrectly formed")
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DROP TABLE t1;
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# modify parent column NULL ON UPDATE RESTRICT child column NOT NULL
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CREATE TABLE t1(f1 INT, f2 INT NOT NULL, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
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CREATE TABLE t2(f1 INT NOT NULL, FOREIGN KEY(f1) REFERENCES t1(f2) ON UPDATE RESTRICT)ENGINE=InnoDB;
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ALTER TABLE t1 MODIFY COLUMN f2 INT;
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DROP TABLE t2, t1;
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# modify parent column NULL ON DELETE RESTRICT child column NOT NULL
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CREATE TABLE t1(f1 INT, f2 INT NOT NULL, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
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CREATE TABLE t2(f1 INT NOT NULL, FOREIGN KEY(f1) REFERENCES t1(f2) ON UPDATE RESTRICT)ENGINE=InnoDB;
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ALTER TABLE t1 MODIFY COLUMN f2 INT;
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DROP TABLE t2, t1;
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# modify parent column NULL ON UPDATE NO ACTION child column NOT NULL
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CREATE TABLE t1(f1 INT, f2 INT NOT NULL, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
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CREATE TABLE t2(f1 INT NOT NULL, FOREIGN KEY(f1) REFERENCES t1(f2) ON UPDATE NO ACTION)ENGINE=InnoDB;
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ALTER TABLE t1 MODIFY COLUMN f2 INT;
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DROP TABLE t2, t1;
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# modify parent column NULL ON DELETE NO ACTION child column NOT NULL
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CREATE TABLE t1(f1 INT, f2 INT NOT NULL, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
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CREATE TABLE t2(f1 INT NOT NULL, FOREIGN KEY(f1) REFERENCES t1(f2) ON DELETE NO ACTION)ENGINE=InnoDB;
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ALTER TABLE t1 MODIFY COLUMN f2 INT;
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DROP TABLE t2, t1;
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# foreign key constraint for multiple columns
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# modify parent column NULL ON UPDATE CASCADE child column NOT NULL
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CREATE TABLE t1(f1 INT NOT NULL, f2 INT NOT NULL,
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INDEX(f1, f2))ENGINE=InnoDB;
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CREATE TABLE t2(f1 INT NOT NULL, f2 INT NOT NULL,
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INDEX(f1, f2),
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FOREIGN KEY(f1, f2) REFERENCES t1(f1, f2) ON
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UPDATE CASCADE)ENGINE=InnoDB;
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ALTER TABLE t1 MODIFY COLUMN f1 INT;
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ERROR HY000: Cannot change column 'f1': used in a foreign key constraint '1' of table 'test.t2'
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DROP TABLE t2, t1;
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# modify child column NOT NULL ON UPDATE CASCADE parent column NULL
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CREATE TABLE t1(f1 INT, f2 INT, INDEX(f1, f2))ENGINE=InnoDB;
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CREATE TABLE t2(f1 INT, f2 INT, INDEX(f1, f2),
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FOREIGN KEY(f1, f2) REFERENCES t1(f1, f2) ON
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UPDATE CASCADE)ENGINE=InnoDB;
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ALTER TABLE t2 MODIFY COLUMN f2 INT NOT NULL;
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ERROR HY000: Column 'f2' cannot be NOT NULL: needed in a foreign key constraint '1' SET NULL
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DROP TABLE t2, t1;
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# allow foreign key constraints when parent table created later
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SET FOREIGN_KEY_CHECKS=0;
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CREATE TABLE t2(f1 INT, FOREIGN KEY(f1) REFERENCES t1(f2) ON UPDATE CASCADE)ENGINE=InnoDB;
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SET FOREIGN_KEY_CHECKS=1;
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ALTER TABLE t2 MODIFY COLUMN f1 INT NOT NULL;
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CREATE TABLE t1(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
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INSERT INTO t1 VALUES(1, 1);
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INSERT INTO t2 VALUES(1);
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UPDATE t1 SET f2= NULL;
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ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `1` FOREIGN KEY (`f1`) REFERENCES `t1` (`f2`) ON UPDATE CASCADE)
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SELECT * FROM t2;
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f1
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1
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SET FOREIGN_KEY_CHECKS=0;
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UPDATE t1 SET f2= NULL;
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SELECT * FROM t2;
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f1
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1
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DROP TABLE t2, t1;
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# Modify column + Drop column & Drop foreign key constraint
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CREATE TABLE t1(f1 INT, f2 INT, KEY(f1), KEY(f2))ENGINE=InnoDB;
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CREATE TABLE t2(f1 INT, f2 INT, f3 INT,
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FOREIGN KEY fdx(f2) REFERENCES t1(f1),
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FOREIGN KEY fdx2(f3) REFERENCES t1(f2))ENGINE=InnoDB;
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ALTER TABLE t2 MODIFY f2 INT NOT NULL, DROP FOREIGN KEY fdx;
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ALTER TABLE t2 ADD FOREIGN KEY fdx (f2) REFERENCES t1(f1);
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ALTER TABLE t2 DROP COLUMN f2, DROP FOREIGN KEY fdx;
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DROP TABLE t2, t1;
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# Drop foreign index & modify column
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CREATE TABLE `t#1`(f1 INT, f2 INT NOT NULL, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
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CREATE TABLE `t#2`(f1 INT NOT NULL, FOREIGN KEY(f1) REFERENCES `t#1`(f2) ON UPDATE CASCADE)ENGINE=InnoDB;
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SET FOREIGN_KEY_CHECKS=0;
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ALTER TABLE `t#2` DROP INDEX f1;
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SET FOREIGN_KEY_CHECKS=1;
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ALTER TABLE `t#1` MODIFY COLUMN f2 INT;
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DROP TABLE `t#2`, `t#1`;
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# Drop referenced index and modify column
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CREATE TABLE `t#1`(f1 INT, f2 INT, PRIMARY KEY(f1), KEY(f2))ENGINE=InnoDB;
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CREATE TABLE `t#2`(f1 INT, FOREIGN KEY(f1) REFERENCES `t#1`(f2) ON UPDATE CASCADE)ENGINE=InnoDB;
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SET FOREIGN_KEY_CHECKS=0;
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ALTER TABLE `t#1` DROP INDEX f2;
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SET FOREIGN_KEY_CHECKS=1;
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ALTER TABLE `t#2` MODIFY COLUMN f1 INT NOT NULL;
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DROP TABLE `t#2`, `t#1`;
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# Self referential modifying column
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CREATE TABLE t1(f1 INT, f2 INT, index(f2), foreign key(f1) references t1(f2) ON UPDATE CASCADE)engine=innodb;
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ALTER TABLE t1 MODIFY COLUMN f2 INT NOT NULL;
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ALTER TABLE t1 MODIFY COLUMN f1 INT NOT NULL;
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ALTER TABLE t1 MODIFY COLUMN f1 INT;
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DROP TABLE t1;
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