MySQL Forums
Forum List  »  Optimizer & Parser

Re: LEFT JOIN Optimization
Posted by: KimSeong Loh
Date: August 21, 2007 06:45PM

Logically WHERE is applied after JOIN, but if it can be done earlier to prune the result, the optimiser may do so, but result wise will be the same as applying WHERE after JOIN.

Options: ReplyQuote


Subject
Views
Written By
Posted
7778
August 21, 2007 03:04PM
Re: LEFT JOIN Optimization
3811
August 21, 2007 06:45PM
3360
August 21, 2007 11:32PM
3308
August 29, 2007 07:19PM


Sorry, you can't reply to this topic. It has been closed.

Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily represent the opinion of Oracle or any other party.