Optimizer problem?
From: Phil Tsao <philt_at_technologist.com>
Date: 1997/10/07
Message-ID: <343AD21D.4C94E1B_at_technologist.com>#1/1
Date: 1997/10/07
Message-ID: <343AD21D.4C94E1B_at_technologist.com>#1/1
Hi,
I was wondering if any one has experienced the same problem.
I have a loop to add 10,000 rows to a table one by one then another loop
to delete each row one by one. After doing so a few times, the
"select count(*) from table" starts doing table scan ( and physical
every time. I thought the index (on primary key) was corrupted due to
the massive insert & delete and rebuilt it. It did not help.
The only way I can force using index is to use hint or the following:
select count(*) from table where pkey > -9999;
Is there anything you know that causes this to happen? Thanks in advance.
-- Phil Tsao philt_at_technologist.comReceived on Tue Oct 07 1997 - 00:00:00 CEST