allow cte queries in loaders

jeffrey crawford:

Just wanted to point out that I’m using a recursive CTE query for ATTR_SQL_SIMPLE. I noted in the past that SQL loader seems to have a sanity check that forces the beginning of the query to begin with “SELECT”, CTE’s begin with “WITH”. I’m just worried that someday it may be corrected and my query will break. Can we please note to allow CTE type queries going forward?