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#
# BUG#22037930: INSERT IGNORE FAILS TO IGNORE
# FOREIGN KEY CONSTRAINT
# Setup.
CREATE TABLE t1 (fld1 INT PRIMARY KEY) ENGINE=INNODB;
CREATE TABLE t2 (fld2 INT, FOREIGN KEY (fld2) REFERENCES t1 (fld1))
ENGINE=INNODB;
INSERT INTO t1 VALUES(0);
INSERT INTO t2 VALUES(0);
# Without fix, an error is reported.
INSERT IGNORE INTO t2 VALUES(1);
Warnings:
Warning 1452 Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`))
Warning 1452 `test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`)
UPDATE IGNORE t2 SET fld2=20 WHERE fld2=0;
Warnings:
Warning 1452 `test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`)
UPDATE IGNORE t1 SET fld1=20 WHERE fld1=0;
Warnings:
Warning 1451 `test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`)
# Test for multi update.
UPDATE IGNORE t1, t2 SET t2.fld2= t2.fld2 + 3;
Warnings:
Warning 1452 `test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`)
UPDATE IGNORE t1, t2 SET t1.fld1= t1.fld1 + 3;
Warnings:
Warning 1451 `test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`)
# Reports an error since IGNORE is not used.
INSERT INTO t2 VALUES(1);
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`))
UPDATE t2 SET fld2=20 WHERE fld2=0;
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`))
UPDATE t1 SET fld1=20 WHERE fld1=0;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`))
UPDATE t1, t2 SET t2.fld2= t2.fld2 + 3;
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`))
UPDATE t1, t2 SET t1.fld1= t1.fld1 + 3;
ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`fld2`) REFERENCES `t1` (`fld1`))
DROP TABLE t2, t1;
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