Re: trigger question

Hi Norman,

I wouldn't get a dup row as the columns make the PK. I just wanted to avoid the error trying to insert a duplicate row. Initially I had an extra column in the table called reloaded (or something similar). The trigger would then increment "reloaded" each time a duplicate insert was attempted instead of the actual insert, but then I had the problem with "mutating tables". I read a post on AskTom's site which detailed a work around, but that seemed a bit much as I have 7 - 8 tables with the same issue. As I've put in an earlier post, I think I'm happy to avoid the problem in the first place using INSERT ALL and/or MERGE INTO into where appropriate.

Thanks again for the feedback,
Cheers
Tony
----- Original Message -----
From: "Norman Dunbar" <norman.dunbar_at_environment-agency.gov.uk> To: <malcolmarnold_at_gmail.com>; <adolph.tony_at_tiscali.de> Cc: <oracle-l_at_freelists.org>
Sent: Monday, November 28, 2005 12:54 PM Subject: Re: trigger question

>
> Morning Tony,
>
> Hmm, seems I'm a bit thicker than at first thought!
> When I wrote this originally :
>
> exception
> when dup_entry_exception then
> raise_application_error(-20000,
> NULL;
>
>
> I really meant this :
>
> exception
> when dup_entry_exception then
> NULL;
>
> This version causes the duplicate to be ignored. However, as dicovered
> by malcolm, this would allow the duplicate row to be inserted and is no
> use to you !
>
> More apologies !
>
>
> Cheers,
> Norman.
>
> Norman Dunbar.
> Contract Oracle DBA.
> Rivers House, Leeds.
>
> Internal : 7 28 2051
> External : 0113 231 2051
>
>
> Information in this message may be confidential and may be legally
privileged. If you have received this message by mistake, please notify the sender immediately, delete it and do not copy it to anyone else.
>
> We have checked this email and its attachments for viruses. But you should
still check any attachment before opening it.
>
> We may have to make this message and any reply to it public if asked to
under the Freedom of Information Act, Data Protection Act or for litigation. Email messages and attachments sent to or from any Environment Agency address may also be accessed by someone other than the sender or recipient, for business purposes.
>
> If we have sent you information and you wish to use it please read our
terms and conditions which you can get by calling us on 08708 506 506. Find out more about the Environment Agency at www.environment-agency.gov.uk

--
http://www.freelists.org/webpage/oracle-l