--source include/have_innodb.inc --source include/have_debug.inc # # exists as global only # select @@global.innodb_force_recovery_crash in (0, 1); select @@global.innodb_force_recovery_crash; --error ER_INCORRECT_GLOBAL_LOCAL_VAR select @@session.innodb_force_recovery_crash; show global variables like 'innodb_force_recovery_crash'; show session variables like 'innodb_force_recovery_crash'; select * from information_schema.global_variables where variable_name='innodb_force_recovery_crash'; select * from information_schema.session_variables where variable_name='innodb_force_recovery_crash'; # show that it's read-only # --error ER_INCORRECT_GLOBAL_LOCAL_VAR set global innodb_force_recovery_crash=1; --error ER_INCORRECT_GLOBAL_LOCAL_VAR set global innodb_force_recovery_crash=0; select @@global.innodb_force_recovery_crash; --error ER_INCORRECT_GLOBAL_LOCAL_VAR set session innodb_force_recovery_crash='some'; --error ER_INCORRECT_GLOBAL_LOCAL_VAR set @@session.innodb_force_recovery_crash='some'; --error ER_INCORRECT_GLOBAL_LOCAL_VAR set global innodb_force_recovery_crash='some';