MySQL Forums
Forum List  »  Stored Procedures

Re: circumventing limitations on the "Liimit" clause
Posted by: Dewey Gaedcke
Date: November 15, 2006 10:06PM

The "order by" substring clearly forces the DB to build the full result set BEFORE sorting so WHY does the parser WAIT to run the @i:=@i+1 assignment until AFTER the sort run??? I'm happy that it does this, but WHY doesn't make any sense to me.........

Regarding scaling, right now it's scanning 12,000 rows and returning me 196 in .02 seconds but I'm VERY INTERESTED in the most scalable way to do this. I'm trying NOT to do it in Java because:
1) there is some data intensive pre-processing that I didn't want to send to the app server
2) there are multiple different queries to run depending upon results of the pre-processing
3) I felt like a stored proc would have it's execution plan cached, rather than having to be parsed, optimized, etc on each Query sent from Java

All feedback welcome!!

Options: ReplyQuote


Subject
Views
Written By
Posted
Re: circumventing limitations on the "Liimit" clause
2402
November 15, 2006 10:06PM


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.