# functional change user tests
#
connect (con_main,localhost,root);

create user test_nopw;
grant select on test.* to test_nopw;
create user test_newpw identified by "newpw";
grant select on test.* to test_newpw;

select user(), current_user(), database();
select concat('<', user(), '>'), concat('<', current_user(), '>'), database();
   

change_user test_nopw;
select concat('<', user(), '>'), concat('<', current_user(), '>'), database();

change_user test_newpw, newpw;
select concat('<', user(), '>'), concat('<', current_user(), '>'), database();

change_user root;
select concat('<', user(), '>'), concat('<', current_user(), '>'), database();

change_user test_nopw,,test;
select concat('<', user(), '>'), concat('<', current_user(), '>'), database();

change_user test_newpw,newpw,test;
select concat('<', user(), '>'), concat('<', current_user(), '>'), database();

change_user root,,test;
select concat('<', user(), '>'), concat('<', current_user(), '>'), database();

drop user test_nopw;
drop user test_newpw;

connection default;
disconnect con_main;

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

--echo Bug#20023
SELECT @@session.sql_big_selects;
# The exact value depends on the server build flags
--replace_result 18446744073709551615 HA_POS_ERROR 4294967295 HA_POS_ERROR
SELECT @@global.max_join_size;
--echo change_user
--change_user
SELECT @@session.sql_big_selects;
# The exact value depends on the server build flags
--replace_result 18446744073709551615 HA_POS_ERROR 4294967295 HA_POS_ERROR
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;
# On some machines the following will result into a warning
--disable_warnings
SET @@global.max_join_size = 18446744073709551615;
--enable_warnings
SET @@session.max_join_size = default;
--echo change_user
--change_user
SELECT @@session.sql_big_selects;

#
# Bug #18329348 Bug #18329560 Bug #18328396 Bug #18329452 mysql_change_user()
# resets all SESSION ONLY system variables
#

SET INSERT_ID=12;
SELECT @@INSERT_ID;
SET TIMESTAMP=200;
SELECT @@TIMESTAMP;
--echo change_user
--change_user
SELECT @@INSERT_ID;
SELECT @@TIMESTAMP=200;

#
# 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');

#
# Bug#31222: com_% global status counters behave randomly with
# mysql_change_user.
#

FLUSH STATUS;

--disable_result_log
--disable_query_log

let $i = 100;

while ($i)
{
  dec $i;

  SELECT 1;
}

--enable_query_log
--enable_result_log

let $before= query_get_value(SHOW GLOBAL STATUS LIKE 'com_select',Value,1);

--change_user

let $after= query_get_value(SHOW GLOBAL STATUS LIKE 'com_select',Value,1);

if ($after != $before){
  SHOW GLOBAL STATUS LIKE 'com_select';
  die The value of com_select changed during change_user;
}
echo Value of com_select did not change;