Re: ORA-12838 please : Is possible to append two times to the same table before doing a commit
- From: "Juan Cachito Reyes Pacheco" <jreyes@xxxxxxxxxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 2 Apr 2004 09:27:05 -0400
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@xxxxxxx>
To: <oracle-l@xxxxxxxxxxxxx>
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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