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mysql.slow_log Table

The mysql.slow_log table stores the contents of the Slow Query Log if slow logging is active and the output is being written to table (see Writing logs into tables).

It contains the following fields:

Field	Type	Null	Default	Description
`start_time`	`timestamp(6)`	NO	`CURRENT_TIMESTAMP(6)`	Time the query began.
`user_host`	`mediumtext`	NO	`NULL`	User and host combination.
`query_time`	`time(6)`	NO	`NULL`	Total time the query took to execute.
`lock_time`	`time(6)`	NO	`NULL`	Total time the query was locked.
`rows_sent`	`int(11)`	NO	`NULL`	Number of rows sent.
`rows_examined`	`int(11)`	NO	`NULL`	Number of rows examined.
`db`	`varchar(512)`	NO	`NULL`	Default database.
`last_insert_id`	`int(11)`	NO	`NULL`	last_insert_id.
`insert_id`	`int(11)`	NO	`NULL`	Insert id.
`server_id`	`int(10) unsigned`	NO	`NULL`	The server's id.
`sql_text`	`mediumtext`	NO	`NULL`	Full query.
`thread_id`	`bigint(21) unsigned`	NO	`NULL`	Thread id.
`rows_affected`	`int(11)`	NO	`NULL`	Number of rows affected by an UPDATE or DELETE (from MariaDB 10.1.2)

Example

SELECT * FROM mysql.slow_log\G
...
*************************** 2. row ***************************
    start_time: 2014-11-11 07:56:28.721519
     user_host: root[root] @ localhost []
    query_time: 00:00:12.000215
     lock_time: 00:00:00.000000
     rows_sent: 1
 rows_examined: 0
            db: test
last_insert_id: 0
     insert_id: 0
     server_id: 1
      sql_text: SELECT SLEEP(12)
     thread_id: 74
...

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https://mariadb.com/kb/en/mysqlslow_log-table/