Re: Functional dependencies and GROUP BY

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com>
Cc: Peter Eisentraut <peter_e(at)gmx(dot)net>, Alex Hunsaker <badalex(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Functional dependencies and GROUP BY
Date: 2010-09-05 15:15:33
Message-ID: 18443.1283699733@sss.pgh.pa.us
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-hackers

Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com> writes:
> On 7 August 2010 03:51, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> I was testing out this feature this morning and discovered that the
> results may be non-deterministic if the PK is deferrable.

Good point.

> The original version of the patch had that check in it, but it
> vanished from the final committed version. Was that just an oversight,
> or an intentional change?

I don't recall having thought about it one way or the other. What did
the check look like?

regards, tom lane

In response to

Responses

Browse pgsql-hackers by date

  From Date Subject
Next Message Dean Rasheed 2010-09-05 15:31:16 Re: Functional dependencies and GROUP BY
Previous Message Tom Lane 2010-09-05 15:06:25 Re: ps buffer is incorrectly padded on the (latest) OS X