RE: Optimizer

From: <Jared.Still_at_radisys.com>
Date: Tue, 9 Mar 2004 22:23:46 -0800
Message-ID: <OF3BEF741F.39A39A78-ON88256E53.00230F24-88256E53.00230CED@radisys.com>

Write some tests in PL/SQL, changing the optimizer_mode as you go, all while a 10046 trace is running.

The trace file will show which optimizer mode is used.

Jared

<Satheesh.Babu_at_iflexsolutions.com>
Sent by: oracle-l-bounce_at_freelists.org
03/09/2004 08:48 PM
Please respond to oracle-l

        To:     <oracle-l_at_freelists.org>
        cc: 
        Subject:        RE: Optimizer_Mode


Jared,
                 Ours is a hybrid application. We wanted to use First_Rows

during
oltp operation and all_rows during batch operations. I read somewhere about this undocumented parameters, where with in pl/sql programs optimizer_mode will be always All_rows. I just wanted to comfirm this, also if this is true we may not have to write logon trigger or someother mechanism to force All_rows. I am talking about 8i as well as 9i db.

Thanks and Regards,
Satheesh Babu.S
Bangalore

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Received on Wed Mar 10 2004 - 00:25:46 CST