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# Variable name: innodb_purge_threads # Scope: Global # Access type: Static # Data type: numeric --source include/have_innodb.inc SELECT COUNT(@@GLOBAL.innodb_purge_threads); --echo 1 Expected SELECT COUNT(@@innodb_purge_threads); --echo 1 Expected --error ER_INCORRECT_GLOBAL_LOCAL_VAR SET @@GLOBAL.innodb_purge_threads=1; --echo Expected error 'Read-only variable' --Error ER_BAD_FIELD_ERROR SELECT innodb_purge_threads = @@SESSION.innodb_purge_threads; --echo Expected error 'Read-only variable' SELECT @@GLOBAL.innodb_purge_threads = VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='innodb_purge_threads'; --echo 1 Expected SELECT COUNT(VARIABLE_VALUE) FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME='innodb_purge_threads'; --echo 1 Expected SELECT @@innodb_purge_threads = @@GLOBAL.innodb_purge_threads; --echo 1 Expected --Error ER_INCORRECT_GLOBAL_LOCAL_VAR SELECT COUNT(@@local.innodb_purge_threads); --echo Expected error 'Variable is a GLOBAL variable' --Error ER_INCORRECT_GLOBAL_LOCAL_VAR SELECT COUNT(@@SESSION.innodb_purge_threads); --echo Expected error 'Variable is a GLOBAL variable' # Check the default value SELECT VARIABLE_NAME, VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES WHERE VARIABLE_NAME = 'innodb_purge_threads';