Re: Problem (bug?) with deferred foreign key checks?

I seem to recall that there is something in 7.1.x where you cannot update
the same row more than once per transaction. Consider altering your code
to not require that or upgrading to 7.2 where that is supposed to be
allowed.

Joshua b. Jore ; http://www.greentechnologist.org ; 1121 1233 1311 200
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On 10 Jun 2002, Adrian 'Dagurashibanipal' von Bidder wrote:

> Yo!
>
> Why is it not possible to temporarily have illegal values in a table,
> and update them during the transaction to point to real entries in the
> 'super' table?
>
> =====
> avbidder=> create table super (id integer unique);
> NOTICE:  [...]
> CREATE
> avbidder=> create table sub (sid integer references super(id) deferrable
> initially deferred);
> NOTICE:  [...]
> CREATE
> avbidder=> begin;
> BEGIN
> avbidder=> insert into sub values (2);
> INSERT 53513 1
> avbidder=> insert into super values (1);
> INSERT 53514 1
> avbidder=> update sub set sid = 1 where sid = 2;
> UPDATE 1
> avbidder=> commit;
> ERROR:  <unnamed> referential integrity violation - key referenced from
> sub not found in super
> =====
>
> (This is Debian package 7.1.3-7, but I'm told it's there with other
> versions, too)
>
> cheers
> -- vbi
>
>
> --
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>
>