Re: deferring/disabling unique index

Joshua D. Drake wrote:
>
> >So, does it mean that the only way to disable the index is to drop and
> >recreate it? What about setting indisunique to false temporarily?
> >
> >
> >
> I am just curious... why would you want to defer a unique constraint?

I remember now --- if you do:

    UPDATE tab SET col = col + 1;

you hit a unique constraint when you shouldn't need to.  I think the
workaround was:

    UPDATE tab SET col = -col + -1;

then:

    UPDATE tab SET col = -col;

This assumes all the values are positive, of course.

--
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073