Implement rows query event

[DZunke]

Sometimes there is a usage for the optional binlog event Rows_query. It contains the original query that triggered other events that change something within the database. It is a "logging" mechanism of MySQL. So by enabling binlog_rows_query_log_events within the MySQL Settings those events will be stored to the database.

With the enabled option the Binlog for a single update query would look like

mysql-bin.000006	2105    Query	                1	       2178	        BEGIN
mysql-bin.000006	2178    Rows_query	        1	       2423	        # /*foo:bar;*/ UPDATE `test` SET foo = 'Foo Bar' WHERE id = 1
mysql-bin.000006	2423    Table_map	        1	       2530	        table_id: 109 (test.test)
mysql-bin.000006	2530    Update_rows	        1	       2950	        table_id: 109 flags: STMT_END_F
mysql-bin.000006	2950    Xid	                1	       2981	        COMMIT /* xid=4779 */

So the query does allow additional additional information for a change. In MariaDB the event is named Annotate_Rows with a different type identifier and so can be surely implemented later if someone needs it.

For more information:

• https://dev.mysql.com/doc/dev/mysql-server/latest/classRows__query__log__event.html