set global log_output = 'TABLE', global slow_query_log = 1;

set slow_query_log = 1;

set min_examined_row_limit = 0;

truncate table mysql.slow_log;

set long_query_time = 0.000001;

set statement min_examined_row_limit = 50 for select sleep(0.1) union select sleep(0.1);

select * from mysql.slow_log;

set min_examined_row_limit = 50;

select sleep(0.1) union select sleep(0.1);

select * from mysql.slow_log;

MariaDB [test]> set statement min_examined_row_limit = 50 for select sleep(0.1) union select sleep(0.1);

+------------+

| sleep(0.1) |

+------------+

|          0 |

+------------+

1 row in set (0.27 sec)

MariaDB [test]> select * from mysql.slow_log;

+----------------------------+------------------------------+-----------------+-----------------+-----------+---------------+------+----------------+-----------+-----------+-----------------------------------------------------------------------------------------+-----------+

| start_time                 | user_host                    | query_time      | lock_time       | rows_sent | rows_examined | db   | last_insert_id | insert_id | server_id | sql_text                                                                                | thread_id |

+----------------------------+------------------------------+-----------------+-----------------+-----------+---------------+------+----------------+-----------+-----------+-----------------------------------------------------------------------------------------+-----------+

| 2014-11-02 13:48:49.526899 | root[root] @ localhost [::1] | 00:00:00.000089 | 00:00:00.000000 |         0 |             0 | test |              0 |         0 |         2 | set long_query_time = 0.000001                                                          |         5 |

| 2014-11-02 13:48:49.790968 | root[root] @ localhost [::1] | 00:00:00.201339 | 00:00:00.000000 |         1 |             1 | test |              0 |         0 |         2 | set statement min_examined_row_limit = 50 for select sleep(0.1) union select sleep(0.1) |         5 |

+----------------------------+------------------------------+-----------------+-----------------+-----------+---------------+------+----------------+-----------+-----------+-----------------------------------------------------------------------------------------+-----------+

2 rows in set (0.00 sec)

MariaDB [test]> set min_examined_row_limit = 50;

Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> select sleep(0.1) union select sleep(0.1);

+------------+

| sleep(0.1) |

+------------+

|          0 |

+------------+

1 row in set (0.20 sec)

MariaDB [test]> select * from mysql.slow_log;

+----------------------------+------------------------------+-----------------+-----------------+-----------+---------------+------+----------------+-----------+-----------+-----------------------------------------------------------------------------------------+-----------+

| start_time                 | user_host                    | query_time      | lock_time       | rows_sent | rows_examined | db   | last_insert_id | insert_id | server_id | sql_text                                                                                | thread_id |

+----------------------------+------------------------------+-----------------+-----------------+-----------+---------------+------+----------------+-----------+-----------+-----------------------------------------------------------------------------------------+-----------+

| 2014-11-02 13:48:49.526899 | root[root] @ localhost [::1] | 00:00:00.000089 | 00:00:00.000000 |         0 |             0 | test |              0 |         0 |         2 | set long_query_time = 0.000001                                                          |         5 |

| 2014-11-02 13:48:49.790968 | root[root] @ localhost [::1] | 00:00:00.201339 | 00:00:00.000000 |         1 |             1 | test |              0 |         0 |         2 | set statement min_examined_row_limit = 50 for select sleep(0.1) union select sleep(0.1) |         5 |

| 2014-11-02 13:48:49.793186 | root[root] @ localhost [::1] | 00:00:00.000394 | 00:00:00.000112 |         2 |             2 | test |              0 |         0 |         2 | select * from mysql.slow_log                                                            |         5 |

+----------------------------+------------------------------+-----------------+-----------------+-----------+---------------+------+----------------+-----------+-----------+-----------------------------------------------------------------------------------------+-----------+

3 rows in set (0.00 sec)