Re: ORA-12838 please : Is possible to append two times to the same table before doing a commit

From: Juan Cachito Reyes Pacheco <jreyes_at_dazasoftware.com>
Date: Fri, 2 Apr 2004 09:27:05 -0400
Message-ID: <01fa01c418b6$3f507b10$2501a8c0@dazasoftware.com>

Thanks Tanel and every one for answering.

Juan Carlos Reyes Pacheco
OCP
Database 9.2 Standard Edition
----- Original Message -----
From: "Tanel Põder" <tanel.poder.003_at_mail.ee> To: <oracle-l_at_freelists.org>
Sent: Friday, April 02, 2004 4:36 AM
Subject: Re: ORA-12838 please : Is possible to append two times to the same table before doing a commit

Hi!

> I believe Oracle is enforcing this to guarantee consistency of the
> database. I realise you are probably using the APPEND hint for
performance
> reasons but is it really necessary?

Yes, when you're doing an insert in append mode, Oracle takes an exclusive lock on the table and inserts rows above high-water-mark, without raising the highwatermark itself. HWM is risen to appropriate position when you commit, so when you rollback, the HWM is just left where it was before.

I don't see a reason why the same session shouldn't be able to do several consecutive direct load inserts on a table, but I might have missed something, or Oracle just hasn't implemented this improvement yet...

Tanel.

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Received on Fri Apr 02 2004 - 07:26:53 CST