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############## mysql-test\t\foreign_key_checks_func.test ##################### # # # Variable Name: foreign_key_checks # # Scope: SESSION # # Access Type: Dynamic # # Data Type: boolean # # Default Value: NA # # Range: NA # # # # # # Creation Date: 2008-03-08 # # Author: Rizwan # # # # Description: Test Cases of Dynamic System Variable foreign_key_checks # # that checks the behavior of this variable # # # # Reference: http://dev.mysql.com/doc/refman/5.1/en/ # # server-system-variables.html # # # ############################################################################### --source include/have_innodb.inc --echo '#--------------------FN_DYNVARS_032_01-------------------------#' #################################################################### # Check if setting foreign_key_checks is changed in new connection # #################################################################### SET @@session.foreign_key_checks = 0; # con1 will be default connection from now on --echo 'connect (con1,localhost,root,,,,)' connect (con1,localhost,root,,,,); --echo 'connection con1' connection con1; SELECT @@session.foreign_key_checks; SET @@session.foreign_key_checks = 1; --echo 'connect (con2,localhost,root,,,,)' connect (con2,localhost,root,,,,); --echo 'connection con2' connection con2; SELECT @@session.foreign_key_checks; disconnect con2; --echo '#--------------------FN_DYNVARS_032_02-------------------------#' ################################################################# # Begin the functionality Testing of foreign_key_checks # ################################################################# --echo 'connection con1' connection con1; --disable_warnings DROP TABLE IF EXISTS t1,t2; --enable_warnings 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); #=========================================================== --echo '---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); --Error ER_NO_REFERENCED_ROW_2 INSERT INTO t2 values (20,22); #=========================================================== --echo '---Check when foreign_key_checks is disabled---' #=========================================================== --Error ER_TRUNCATE_ILLEGAL_FK TRUNCATE t1; 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); --echo 'try enabling foreign_key_checks again'; SET @@session.foreign_key_checks = 1; UPDATE t2 SET b=4 where a=20; #============================================================================== --echo '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; # Test disabled as error description is different. The resulting description has # difference in code #sql-xxx_2 where xxx is different for each run. #--Error ER_NO_REFERENCED_ROW_2 #ALTER TABLE t2 #ADD CONSTRAINT fk FOREIGN KEY (b) REFERENCES t1 (a); # delete all rows with incorrect reference 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; --disable_warnings DROP TABLE IF EXISTS t2; DROP TABLE IF EXISTS t1; --enable_warnings ########################################################## # End of functionality Testing for foreign_key_checks # ##########################################################