--source include/have_xtradb.inc SELECT COUNT(@@GLOBAL.innodb_use_stacktrace); --echo 1 Expected #################################################################### # Check if Value can set # #################################################################### --error ER_INCORRECT_GLOBAL_LOCAL_VAR SET @@GLOBAL.innodb_use_stacktrace=1; --echo Expected error 'Read only variable' SELECT COUNT(@@GLOBAL.innodb_use_stacktrace); --echo 1 Expected ################################################################# # Check if the value in GLOBAL Table matches value in variable # ################################################################# SELECT IF(@@GLOBAL.innodb_use_stacktrace, 'ON', 'OFF') = VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='innodb_use_stacktrace'; --echo 1 Expected SELECT COUNT(@@GLOBAL.innodb_use_stacktrace); --echo 1 Expected SELECT COUNT(VARIABLE_VALUE) FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='innodb_use_stacktrace'; --echo 1 Expected ################################################################################ # Check if accessing variable with and without GLOBAL point to same variable # ################################################################################ SELECT @@innodb_use_stacktrace = @@GLOBAL.innodb_use_stacktrace; --echo 1 Expected SELECT COUNT(@@innodb_use_stacktrace); --echo 1 Expected --Error ER_INCORRECT_GLOBAL_LOCAL_VAR SELECT COUNT(@@local.innodb_use_stacktrace); --echo Expected error 'Variable is a GLOBAL variable' --Error ER_INCORRECT_GLOBAL_LOCAL_VAR SELECT COUNT(@@SESSION.innodb_use_stacktrace); --echo Expected error 'Variable is a GLOBAL variable' SELECT COUNT(@@GLOBAL.innodb_use_stacktrace); --echo 1 Expected --Error ER_BAD_FIELD_ERROR SELECT innodb_use_stacktrace = @@SESSION.innodb_use_stacktrace; --echo Expected error 'Readonly variable'