Re: Avoding Mutation of Table trigger

If you're on a version of Oracle that supports it, you can do this with an autonomous transaction.

Jared

On Tuesday 20 August 2002 01:28, N J Neog wrote:
> Hi,
>
> This problem/solution may be posted earlier, but would like to hear
> a solution from you.
>
> I have two table say TAB1 and TAB2. TAB2 is a detail of TAB1 table.
>
> 1. TAB1
> Pk_key numnber(10)
> AMT numnber(14,2)
> ... More colums
> pk_key is Primary Key.
>
>
> 2. TAB2
> Pk_key numnber(10)
> PK_sl number(2)
> AMT numnber(14,2)
> ... More colums
> 1. pk_key + pk_sl is Primary Key.
> 2. pk_key is foreign key to tab1
>
> Now I would like to write a trigger in TAB2 for INSERT and UPDATE operation
> which will update the AMT coloum of TAB1. The value to be updated is sum of
> AMT coloumn of TAB2 for the PK_KEY value.
> i.e. select sum(amt) into tot from TAB2 where PK_KEY= :NEW.PK_KEY;
>
> Since TAB2 is currently being modified it can not be read.
>
> so, how to solve it ?
>
> TIA
>
> Regards.
>
> Naba

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Author: Jared Still
  INET: jkstill_at_cybcon.com

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