RE : RE: Query takes ages in Oracle 10G
- From: Isabel Bedoya <isabel_bga@xxxxxxxx>
- To: Brandon.Allen@xxxxxxxxxxx, oracle-l@xxxxxxxxxxxxx
- Date: Thu, 21 Sep 2006 17:26:16 -0400 (EDT)
Yeap!.. I just copy paste this query to SQL*Plus, and then I have to kill it
with the task manager, it just locks and doesn't return any result at all!. But
in Oracle 9i, it returns the values in a matter of seconds
"Allen, Brandon" <Brandon.Allen@xxxxxxxxxxx> a écrit : If I understand
correctly, you're saying that the following query is the problem - it runs slow
by itself, regardless of the other sub and parent queries:
SELECT VENCIM_TITULO_NUMERO___
FROM VENCIM
WHERE VENCIM_ESCENA_CODIGO___ = 'REAL' AND
VENCIM_PORTAF_CODIGO___ = 'OBL' AND
VENCIM_ESTADO___ = 2
AND
VENCIM_FECCOBORI <= '21/09/2006'
Is that correct?
What was the explain plan for this query when you traced it?
Maybe it is expecting the date predicate to be more selective than it really
is so it's using an index there instead of a FTS?
Maybe the problem could be related to auto gathering of histograms in 10g?
Try deleting histograms on the table and see if that helps. Or, on the
contrary, maybe your auto stats job hasn't run yet in your new 10g database so
your stats are absent or out of date?
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