Don't split INSERT INTO SELECT into two statements

BTW, There is a sad little junit test called TestSqlCmdInterface.java that exercises ad nauseum the statement pre-parsing and rewriting. It MIGHT be worth extending to exercise your INSERT INTO SELECT patterns -- though I'm not terribly attached to the style of the existing tests, so feel free to diverge from that. There MIGHT be test cases there that could get broken by your changes (just by virtue of the fact that you touched the code). Some of the tested behaviors are pretty obscure, so don't stress if you have to tweak or disable an existing test or two there.