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Bug#20023
SELECT @@session.sql_big_selects;
@@session.sql_big_selects
1
SELECT @@global.max_join_size;
@@global.max_join_size
HA_POS_ERROR
change_user
SELECT @@session.sql_big_selects;
@@session.sql_big_selects
1
SELECT @@global.max_join_size;
@@global.max_join_size
HA_POS_ERROR
SET @@global.max_join_size = 10000;
SET @@session.max_join_size = default;
change_user
SELECT @@session.sql_big_selects;
@@session.sql_big_selects
0
SET @@global.max_join_size = -1;
SET @@session.max_join_size = default;
change_user
SELECT @@session.sql_big_selects;
@@session.sql_big_selects
1
Bug#31418
SELECT IS_FREE_LOCK('bug31418');
IS_FREE_LOCK('bug31418')
1
SELECT IS_USED_LOCK('bug31418');
IS_USED_LOCK('bug31418')
NULL
SELECT GET_LOCK('bug31418', 1);
GET_LOCK('bug31418', 1)
1
SELECT IS_USED_LOCK('bug31418') = CONNECTION_ID();
IS_USED_LOCK('bug31418') = CONNECTION_ID()
1
change_user
SELECT IS_FREE_LOCK('bug31418');
IS_FREE_LOCK('bug31418')
1
SELECT IS_USED_LOCK('bug31418');
IS_USED_LOCK('bug31418')
NULL
FLUSH STATUS;
SHOW GLOBAL STATUS LIKE 'com_select';
Variable_name Value
Com_select 112
SHOW GLOBAL STATUS LIKE 'com_select';
Variable_name Value
Com_select 112
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