write sets and read sets

Hi,
Could someone please tell me some of the ways one can extract the read and write sets for a query or a transaction. I understand using Triggers might be one approach.

What's the most efficient way to extract this information.

Thanks,
Alex

-- 
MySQL Internals Mailing List
For list archives: 
http://lists.mysql.com/internals
To unsubscribe:    
http://lists.mysql.com/internals?unsub=lists@pantek.com