#
# only global
#
--replace_result $MYSQL_TMP_DIR MYSQL_TMP_DIR
select @@global.socket;
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
select @@session.socket;
--replace_result $MYSQL_TMP_DIR MYSQL_TMP_DIR
show global variables like 'socket';
--replace_result $MYSQL_TMP_DIR MYSQL_TMP_DIR
show session variables like 'socket';
--replace_result $MYSQL_TMP_DIR MYSQL_TMP_DIR
select * from information_schema.global_variables where variable_name='socket';
--replace_result $MYSQL_TMP_DIR MYSQL_TMP_DIR
select * from information_schema.session_variables where variable_name='socket';

#
# show that it's read-only
#
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
set global socket=1;
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
set session socket=1;