| Current Path : /usr/opt/mysql57/mysql-test/suite/sys_vars/r/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/opt/mysql57/mysql-test/suite/sys_vars/r/foreign_key_checks_func.result |
'#--------------------FN_DYNVARS_032_01-------------------------#' SET @@session.foreign_key_checks = 0; 'connect (con1,localhost,root,,,,)' 'connection con1' SELECT @@session.foreign_key_checks; @@session.foreign_key_checks 1 SET @@session.foreign_key_checks = 1; 'connect (con2,localhost,root,,,,)' 'connection con2' SELECT @@session.foreign_key_checks; @@session.foreign_key_checks 1 '#--------------------FN_DYNVARS_032_02-------------------------#' 'connection con1' DROP TABLE IF EXISTS t1,t2; CREATE TABLE t1(a INT PRIMARY KEY)ENGINE = INNODB; CREATE TABLE t2(a INT PRIMARY KEY,b INT)ENGINE = INNODB; ALTER TABLE t2 ADD CONSTRAINT fk FOREIGN KEY (b) REFERENCES t1 (a); '---Check when foreign_key_checks is enabled---' SET @@session.foreign_key_checks = 1; INSERT INTO t1 values (1),(2),(3); INSERT INTO t2 values (10,1); INSERT INTO t2 values (20,22); ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `fk` FOREIGN KEY (`b`) REFERENCES `t1` (`a`)) '---Check when foreign_key_checks is disabled---' TRUNCATE t1; ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `fk` FOREIGN KEY (`b`) REFERENCES `test`.`t1` (`a`)) SET @@session.foreign_key_checks = 0; TRUNCATE t1; TRUNCATE t2; INSERT INTO t1 values (1),(2),(3); INSERT INTO t2 values (10,1); INSERT INTO t2 values (20,4); 'try enabling foreign_key_checks again'; SET @@session.foreign_key_checks = 1; UPDATE t2 SET b=4 where a=20; 'Check when foreign_key_checks is enabled and FK constraint is re-created' SET @@session.foreign_key_checks = 0; TRUNCATE t2; TRUNCATE t1; INSERT INTO t1 values (1),(2),(3); INSERT INTO t2 values (10,1),(20,4); ALTER TABLE t2 DROP FOREIGN KEY fk; SET @@session.foreign_key_checks = 1; DELETE FROM t2 WHERE b not in (SELECT a from t1); ALTER TABLE t2 ADD CONSTRAINT fk FOREIGN KEY (b) REFERENCES t1 (a); INSERT INTO t2 values (20,2); SELECT * from t2; a b 10 1 20 2 DROP TABLE IF EXISTS t2; DROP TABLE IF EXISTS t1;