# # 2010-01-20 OBN - Added check for variable value matching I_S tables # SET @start_global_value = @@global.lc_messages; SELECT @start_global_value; # # exists as global and session # select @@global.lc_messages; select @@session.lc_messages; show global variables like 'lc_messages'; show session variables like 'lc_messages'; select * from information_schema.global_variables where variable_name='lc_messages'; select * from information_schema.session_variables where variable_name='lc_messages'; # # show that it's writable # set global lc_messages=1; select @@global.lc_messages; set session lc_messages=2; select @@session.lc_messages; set global lc_messages="en_US"; set session lc_messages="en_GB"; select @@global.lc_messages; select @@session.lc_messages; select * from information_schema.global_variables where variable_name='lc_messages'; select * from information_schema.session_variables where variable_name='lc_messages'; # # incorrect types # --error ER_WRONG_TYPE_FOR_VAR set global lc_messages=1.1; --error ER_WRONG_TYPE_FOR_VAR set global lc_messages=1e1; SET @@global.lc_messages = @start_global_value; SELECT @@global.lc_messages;