# uint global --source include/not_embedded.inc --source include/windows.inc SET @start_global_value = @@global.thread_pool_min_threads; # # exists as global only # select @@global.thread_pool_min_threads; --error ER_INCORRECT_GLOBAL_LOCAL_VAR select @@session.thread_pool_min_threads; show global variables like 'thread_pool_min_threads'; show session variables like 'thread_pool_min_threads'; select * from information_schema.global_variables where variable_name='thread_pool_min_threads'; select * from information_schema.session_variables where variable_name='thread_pool_min_threads'; # # show that it's writable # set global thread_pool_min_threads=1; select @@global.thread_pool_min_threads; set global thread_pool_min_threads=65536; select @@global.thread_pool_min_threads; --error ER_GLOBAL_VARIABLE set session thread_pool_min_threads=1; # # incorrect types # --error ER_WRONG_TYPE_FOR_VAR set global thread_pool_min_threads=1.1; --error ER_WRONG_TYPE_FOR_VAR set global thread_pool_min_threads=1e1; --error ER_WRONG_TYPE_FOR_VAR set global thread_pool_min_threads="foo"; set global thread_pool_min_threads=0; select @@global.thread_pool_min_threads; set global thread_pool_min_threads=10000000000; select @@global.thread_pool_min_threads; SET @@global.thread_pool_min_threads = @start_global_value;