#
# functional change user tests
#

grant select on test.* to test_nopw;
grant select on test.* to test_oldpw identified by password "09301740536db389";
grant select on test.* to test_newpw identified by "newpw";

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

#
# massaging the data for tests to pass in the embedded server,
# that has authentication completely disabled or, if enabled, can
# only do new auth (20-byte scramble).
#

change_user test_nopw;
--replace_result <@> <test_nopw@%> @> @localhost>
select concat('<', user(), '>'), concat('<', current_user(), '>'), database();

#
# embedded with enabled privilege control cannot do plugin negotiation.
# that is, it cannot try to authenticate with a new scramble, receive a request
# to switch to an old scramble, and retry with an old scramble.
# As a result, it cannot change to a user that has old scramble and
# and it stays logged as a previous user - test_nopw in this test file.
# For the embedded with auth we replace nopw with oldpw in the results.
#
let $repl = `select if(version() like '%embedded%' and user() like '%nopw%', 'nopw', 'oldpw')`;

change_user test_oldpw, oldpw;
--replace_result <@> <test_oldpw@%> @> @localhost> $repl oldpw
select concat('<', user(), '>'), concat('<', current_user(), '>'), database();
change_user test_newpw, newpw;
--replace_result <@> <test_newpw@%> @> @localhost>
select concat('<', user(), '>'), concat('<', current_user(), '>'), database();
change_user root;
--replace_result <@> <root@localhost> @> @localhost>
select concat('<', user(), '>'), concat('<', current_user(), '>'), database();

change_user test_nopw,,test;
--replace_result <@> <test_nopw@%> @> @localhost>
select concat('<', user(), '>'), concat('<', current_user(), '>'), database();
change_user test_oldpw,oldpw,test;
--replace_result <@> <test_oldpw@%> @> @localhost> $repl oldpw
select concat('<', user(), '>'), concat('<', current_user(), '>'), database();
change_user test_newpw,newpw,test;
--replace_result <@> <test_newpw@%> @> @localhost>
select concat('<', user(), '>'), concat('<', current_user(), '>'), database();
change_user root,,test;
--replace_result <@> <root@localhost> @> @localhost>
select concat('<', user(), '>'), concat('<', current_user(), '>'), database();

drop user test_nopw;
drop user test_oldpw;
drop user test_newpw;

#
# Bug#20023 mysql_change_user() resets the value of SQL_BIG_SELECTS
# The replace's are here to fix things for 32 bit systems
#

--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;
--replace_result 4294967295 18446744073709551615
SELECT @@global.max_join_size;
--replace_result 4294967295 18446744073709551615
SELECT @@session.max_join_size;

#
# 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 $i = 100;
begin;
while ($i)
{
  dec $i;
  SELECT 1;
}
commit;

--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;