mariadb/mysql-test/t/change_user.test

#
# Bug#20023 mysql_change_user() resets the value of SQL_BIG_SELECTS
#

--echo Bug#20023
SELECT @@session.sql_big_selects;
SELECT @@global.max_join_size;
--echo change_user
--change_user
SELECT @@session.sql_big_selects;
SELECT @@global.max_join_size;
SET @@global.max_join_size = 10000;
SET @@session.max_join_size = default;
--echo change_user
--change_user
SELECT @@session.sql_big_selects;
SET @@global.max_join_size = -1;
SET @@session.max_join_size = default;
--echo change_user
--change_user
SELECT @@session.sql_big_selects;

#
# Bug#31418 User locks misfunctioning after mysql_change_user()
#

--echo Bug#31418
SELECT IS_FREE_LOCK('bug31418');
SELECT IS_USED_LOCK('bug31418');
SELECT GET_LOCK('bug31418', 1);
SELECT IS_USED_LOCK('bug31418') = CONNECTION_ID();
--echo change_user
--change_user
SELECT IS_FREE_LOCK('bug31418');
SELECT IS_USED_LOCK('bug31418');