Walt, ----- Original Message ----- From: "walt" <[EMAIL PROTECTED]> To: "Heikki Tuuri" <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> Sent: Tuesday, October 15, 2002 5:56 PM Subject: Re: innodb not using correct index
> Heikki Tuuri wrote: > > > Walt, > > > > ----- Original Message ----- > ... > > Heikki, > Thanks for you answer! > I found what appears to be a tweak (I'd say BUG but the info is correct) needed > with mysql. > If I make this query a range on the date, it takes less than a second to return > the result even though the > ending date I'm using is > the max(date) in the table. > > > Example: > > mysql> select max(CREATE_DATE) FROM XRAY; > +---------------------+ > | max(CREATE_DATE) | > +---------------------+ > | 2002-10-03 20:12:57 | > +---------------------+ > 1 row in set (0.07 sec) > > select several_fields from xray > where create_date > '2002-10-03' > and cust_id = 'TEST1'; > > Takes about 1 1/2 minutes > > select several_fields from xray > where create_date > '2002-10-03' > and create_date < '2002-10-03 23:59:59' > and cust_id = 'TEST1'; > > Takes less than a second. > > Problem solved! I guess 3.23.53 solves exactly this optimization glitch. Unfortunately, Lenz seems to have built max-3.23.53 without InnoDB, and you have to wait to tomorrow to test it. > Thanks again Heikki! > > walt Thank you! Heikki sql query --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
