per...@elem.com (Perrin Harkins) writes: > On Wed, May 27, 2009 at 6:43 AM, Simon J Mudd <sjm...@pobox.com> wrote: > > So is the format of the DELETE FROM .. WHERE ... IN ( ... ) clause I > > propose valid and SHOULD the optimiser recognise this and be expected > > to just find the 2 rows by searching on the primary key? > > Not according to the docs: > http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html#function_in
I'm not sure that the reference makes anything clear. The statements are wrote ARE valid SQL and even though containing mulitiple column values ARE "constants". Problem is I'm finding it hard to find a definitive reference to something like this. I'll have to check my Joe Celko books to see if he mentions ths. Simon -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=arch...@jab.org
