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

From: Tanel Põder <tanel.poder.003_at_mail.ee>
Date: Fri, 2 Apr 2004 11:36:13 +0300
Message-ID: <09e701c4188d$8ea9e210$6df923d5@porgand>

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 - 02:32:43 CST