How is UNION implemented? Does it read from two source files or does it create a temporary file by reading the N source files/relations and then writing a new temp file which is then read from?
I could probably spend an hour looking through the source to figure this out but I figured I would just ask. -- Founder/CEO Spinn3r.com Location: *San Francisco, CA* Skype: *burtonator* Skype-in: *(415) 871-0687*
