Get Full MySQL Query String on Insert or Update

Question

Need help with MySQL as it\'s not really my forte. So any help is appreciated.

I have issues on my site where UPDATE or INSERT were done wi

Answer 1

You can get the current SQL query as a string with the following statement:

SELECT info FROM INFORMATION_SCHEMA.PROCESSLIST WHERE id = CONNECTION_ID()

So what you have to do is to create a TRIGGER which runs on insert and/or update operations on your table which should (i) get the current sql statement and (ii) insert it into another table, like so:

DELIMITER |

CREATE TRIGGER log_queries_insert BEFORE INSERT ON `your_table`
FOR EACH ROW
BEGIN
    DECLARE original_query VARCHAR(1024);
    SET original_query = (SELECT info FROM INFORMATION_SCHEMA.PROCESSLIST WHERE id = CONNECTION_ID());
    INSERT INTO `app_sql_debug_log`(`query`) VALUES (original_query);
END;
|
DELIMITER ;

You will have to create two triggers - one for updates and one for inserts. The trigger inserts the new query as a string in the app_sql_debug_log table in the query column.