SET @session_start_value = @@session.foreign_key_checks; SELECT @session_start_value; @session_start_value 1 '#--------------------FN_DYNVARS_032_01------------------------#' SET @@session.foreign_key_checks = 1; SET @@session.foreign_key_checks = DEFAULT; SELECT @@session.foreign_key_checks; @@session.foreign_key_checks 0 '#---------------------FN_DYNVARS_032_02-------------------------#' SET foreign_key_checks = 1; SELECT @@foreign_key_checks; @@foreign_key_checks 1 SELECT session.foreign_key_checks; ERROR 42S02: Unknown table 'session' in field list SELECT local.foreign_key_checks; ERROR 42S02: Unknown table 'local' in field list SET session foreign_key_checks = 0; SELECT @@session.foreign_key_checks; @@session.foreign_key_checks 0 '#--------------------FN_DYNVARS_032_03------------------------#' SET @@session.foreign_key_checks = 0; SELECT @@session.foreign_key_checks; @@session.foreign_key_checks 0 SET @@session.foreign_key_checks = 1; SELECT @@session.foreign_key_checks; @@session.foreign_key_checks 1 '#--------------------FN_DYNVARS_032_04-------------------------#' SET @@session.foreign_key_checks = -1; ERROR 42000: Variable 'foreign_key_checks' can't be set to the value of '-1' SET @@session.foreign_key_checks = 2; ERROR 42000: Variable 'foreign_key_checks' can't be set to the value of '2' SET @@session.foreign_key_checks = "T"; ERROR 42000: Variable 'foreign_key_checks' can't be set to the value of 'T' SET @@session.foreign_key_checks = "Y"; ERROR 42000: Variable 'foreign_key_checks' can't be set to the value of 'Y' SET @@session.foreign_key_checks = TR�E; ERROR 42000: Variable 'foreign_key_checks' can't be set to the value of 'TR�E' SET @@session.foreign_key_checks = �N; ERROR 42000: Variable 'foreign_key_checks' can't be set to the value of '�N' SET @@session.foreign_key_checks = OF; ERROR 42000: Variable 'foreign_key_checks' can't be set to the value of 'OF' SET @@session.foreign_key_checks = �FF; ERROR 42000: Variable 'foreign_key_checks' can't be set to the value of '�FF' SET @@session.foreign_key_checks = '�'; ERROR 42000: Variable 'foreign_key_checks' can't be set to the value of '�' SET @@session.foreign_key_checks = NO; ERROR 42000: Variable 'foreign_key_checks' can't be set to the value of 'NO' '#-------------------FN_DYNVARS_032_05----------------------------#' SET @@global.foreign_key_checks = 0; SELECT @@global.foreign_key_checks; @@global.foreign_key_checks 0 SET @@global.foreign_key_checks = 1; '#----------------------FN_DYNVARS_032_06------------------------#' SELECT count(VARIABLE_VALUE) FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='foreign_key_checks'; count(VARIABLE_VALUE) 1 '#----------------------FN_DYNVARS_032_07------------------------#' SELECT IF(@@session.foreign_key_checks, "ON", "OFF") = VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_VARIABLES WHERE VARIABLE_NAME='foreign_key_checks'; IF(@@session.foreign_key_checks, "ON", "OFF") = VARIABLE_VALUE 1 SELECT @@session.foreign_key_checks; @@session.foreign_key_checks 1 SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.SESSION_VARIABLES WHERE VARIABLE_NAME='foreign_key_checks'; VARIABLE_VALUE ON '#---------------------FN_DYNVARS_032_08-------------------------#' SET @@session.foreign_key_checks = OFF; SELECT @@session.foreign_key_checks; @@session.foreign_key_checks 0 SET @@session.foreign_key_checks = ON; SELECT @@session.foreign_key_checks; @@session.foreign_key_checks 1 '#---------------------FN_DYNVARS_032_09----------------------#' SET @@session.foreign_key_checks = TRUE; SELECT @@session.foreign_key_checks; @@session.foreign_key_checks 1 SET @@session.foreign_key_checks = FALSE; SELECT @@session.foreign_key_checks; @@session.foreign_key_checks 0 SET @@session.foreign_key_checks = @session_start_value; SELECT @@session.foreign_key_checks; @@session.foreign_key_checks 1