joomla/joomla-cms — pull request #2735 by chrisdavenport (2013-12-28 15:41:22+00:00)
Title: Fix for JDatabaseQuery->union method.  See #32995.

Also minor corrections and improvements to docblocks for union methods.

Union method currently just doesn't work at all. This fixes it. See tracker #32995 and PR #1629. If accepted this fix also needs to go into Joomla 2.5 and Framework 1.x.