| Server IP : 88.99.149.37 / Your IP : 216.73.216.141 Web Server : nginx/1.31.2 System : Linux server-88-99-149-37 6.12.0-124.56.5.el10_1.x86_64 #1 SMP PREEMPT_DYNAMIC Fri May 15 06:12:08 EDT 2026 x86_64 User : muralimurth ( 1015) PHP Version : 8.4.23 Disable Function : exec,system,passthru,shell_exec,proc_close,proc_open,dl,popen,show_source,posix_kill,posix_mkfifo,posix_getpwuid,posix_setpgid,posix_setsid,posix_setuid,posix_setgid,posix_seteuid,posix_setegid,posix_uname MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /usr/local/mysql/mysql-test/suite/storage_engine/ |
Upload File : |
DROP TABLE IF EXISTS t1, t2; CREATE TABLE t1 (a <INT_COLUMN>, b <CHAR_COLUMN>, <CUSTOM_INDEX> (a) ) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>; CREATE TABLE t2 (a <INT_COLUMN>, b <CHAR_COLUMN>, FOREIGN KEY (a) REFERENCES t1(a) ) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>; SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `a` int(11) DEFAULT NULL, `b` char(8) DEFAULT NULL, KEY `a` (`a`), CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`) ) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1 INSERT INTO t2 (a,b) VALUES (1,'a'),(2,'b'); ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)) INSERT INTO t1 (a,b) VALUES (1,'c'),(2,'d'); INSERT INTO t2 (a,b) VALUES (1,'a'),(2,'b'); UPDATE t2 SET a=a+1; ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)) UPDATE t1 SET a=3 WHERE a=2; ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)) DELETE FROM t1 WHERE a=2; ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`)) DELETE FROM t2 WHERE a=2; SELECT a,b FROM t1; a b 1 c 2 d SELECT a,b FROM t2; a b 1 a DROP TABLE t1; ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails DROP TABLE t2; CREATE TABLE t2 (a <INT_COLUMN>, b <CHAR_COLUMN>, FOREIGN KEY (a) REFERENCES t1(a) ON DELETE CASCADE ON UPDATE CASCADE ) ENGINE=<STORAGE_ENGINE> <CUSTOM_TABLE_OPTIONS>; SHOW CREATE TABLE t2; Table Create Table t2 CREATE TABLE `t2` ( `a` int(11) DEFAULT NULL, `b` char(8) DEFAULT NULL, KEY `a` (`a`), CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`) ON DELETE CASCADE ON UPDATE CASCADE ) ENGINE=<STORAGE_ENGINE> DEFAULT CHARSET=latin1 INSERT INTO t2 (a,b) VALUES (1,'a'),(2,'b'),(3,'c'),(4,'d'); ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `t1` (`a`) ON DELETE CASCADE ON UPDATE CASCADE) INSERT INTO t1 (a,b) VALUES (3,'a'),(4,'a'); INSERT INTO t2 (a,b) VALUES (1,'a'),(2,'b'),(3,'c'),(4,'d'),(4,'e'),(3,'a'); UPDATE t1 SET a=a+1; SELECT a,b FROM t2; a b 5 a 5 a 5 b 5 c 5 d 5 e DELETE FROM t1 WHERE b='a' LIMIT 2; SELECT a,b FROM t2; a b TRUNCATE TABLE t1; ERROR 42000: Cannot truncate a table referenced in a foreign key constraint (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`a`) REFERENCES `test`.`t1` (`a`)) DROP TABLE t2; DROP TABLE t1;