Re: BUG #5081: ON INSERT rule does not work correctly - Mailing list pgsql-bugs

Hi,

You can use a trigger before insert and a pl/pgsql function that goes:

BEGIN
  UPDATE table SET ... WHERE pk=NEW.pk
  IF FOUND THEN
   RETURN NULL;
  ELSE
   RETURN NEW;
  END IF;
END;

Jacques.

At 19:36 27/09/2009, Robert Haas wrote:
>Sometimes when I've needed to do this I've written a PL/pgsql function
>that tries the insert and then fails over to an UPDATE if the INSERT
>fails due to a unique-violation.  I'm not sure that's 100% robust
>either, though, unless using serializable mode.
>
>...Robert
>
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