umbraco/Umbraco-CMS — pull request #271 by Bitmapped (2013-12-16 17:51:23+00:00)
Title: Fix error U4-3876

MySQL has limitations on using subselects to determine records to delete. This was causing problems when clearing the XML cache. This fix restructures the query to fix U4-3876.

This fix has been tested on MySQL. I don't have a MSSQL instance to test it, but I don't think it should break things there.