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d665fc3bd7
behave randomly with mysql_change_user. The problem was that global status variables were not updated in THD::check_user(), so thread statistics were lost after COM_CHANGE_USER. The fix is to update global status variables with the thread ones before preparing the thread for new user.
53 lines
1.1 KiB
Text
53 lines
1.1 KiB
Text
Bug#20023
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SELECT @@session.sql_big_selects;
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@@session.sql_big_selects
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1
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SELECT @@global.max_join_size;
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@@global.max_join_size
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18446744073709551615
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change_user
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SELECT @@session.sql_big_selects;
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@@session.sql_big_selects
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1
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SELECT @@global.max_join_size;
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@@global.max_join_size
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18446744073709551615
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SET @@global.max_join_size = 10000;
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SET @@session.max_join_size = default;
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change_user
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SELECT @@session.sql_big_selects;
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@@session.sql_big_selects
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0
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SET @@global.max_join_size = -1;
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SET @@session.max_join_size = default;
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change_user
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SELECT @@session.sql_big_selects;
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@@session.sql_big_selects
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1
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Bug#31418
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SELECT IS_FREE_LOCK('bug31418');
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IS_FREE_LOCK('bug31418')
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1
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SELECT IS_USED_LOCK('bug31418');
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IS_USED_LOCK('bug31418')
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NULL
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SELECT GET_LOCK('bug31418', 1);
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GET_LOCK('bug31418', 1)
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1
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SELECT IS_USED_LOCK('bug31418') = CONNECTION_ID();
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IS_USED_LOCK('bug31418') = CONNECTION_ID()
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1
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change_user
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SELECT IS_FREE_LOCK('bug31418');
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IS_FREE_LOCK('bug31418')
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1
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SELECT IS_USED_LOCK('bug31418');
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IS_USED_LOCK('bug31418')
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NULL
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FLUSH STATUS;
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SHOW GLOBAL STATUS LIKE 'com_select';
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Variable_name Value
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Com_select 112
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SHOW GLOBAL STATUS LIKE 'com_select';
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Variable_name Value
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Com_select 112
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