I think that was _db_query_callback(). The leading underscore indicates it was never really for public use. However, looking it the code is had, then it's not needed in D7 queries.
Nancy
Injustice anywhere is a threat to justice everywhere. -- Dr. Martin L. King, Jr.
From: Jeff Greenberg
How does one achieve the same functionality in D7 as with db_query_callback in D6?