On Fri, Oct 26, 2007 at 12:34:06PM +0200, Reg Me Please wrote: > it's very fast (of course!). But when I run: > > SELECT * FROM T_DATA NATURAL JOIN T_FIELDS WHERE TABL_ID='TABL'; > > it's very slow. > The EXPLAIN says that in the second case it has to do a sequential > scan on T_DATA. And this explains the timing. > Is there a way to avoid such a behaviour by acting on indexes?
Firstly, have you run ANALYZE recently. Secondly, you'll have to show us the output of EXPLAIN ANALYZE if you want some useful help. Have a nice day, -- Martijn van Oosterhout <[EMAIL PROTECTED]> http://svana.org/kleptog/ > From each according to his ability. To each according to his ability to > litigate.
signature.asc
Description: Digital signature
