Thread: Sequence queries on pg_depend lacking classid filter

Sequence queries on pg_depend lacking classid filter

From
Magnus Hagander
Date:
There are a number of cases where queries in both pgadmin4 and pgadmin3 are done against pg_depend but falis to constrain the query on classid.

In particular, if for example a constraint and a sequence exists with the same oid (which is perfectly valid, as they are in different tables), a column will suddenly refer sequences that are completely incorrect. When we look up sequences, we have to make sure we only match dependencies against pg_class.

AFAICT, the following patch catches the important ones. I could go ahead and push it, but given that we're in RC I'd appreciate a round of review before doing that, even though it looks fairly simple.

I've got the same changes in a patch to pgadmin3, as these queries are basically a copy/paste from there. But let's focus the review on the one for pgadmin4 :)

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Attachment

Re: Sequence queries on pg_depend lacking classid filter

From
Dave Page
Date:
Thanks - committed with a minor change to remove a duplicate WHERE
clause that you added to one of the queries.

On Thu, Sep 15, 2016 at 5:22 PM, Magnus Hagander <magnus@hagander.net> wrote:
> There are a number of cases where queries in both pgadmin4 and pgadmin3 are
> done against pg_depend but falis to constrain the query on classid.
>
> In particular, if for example a constraint and a sequence exists with the
> same oid (which is perfectly valid, as they are in different tables), a
> column will suddenly refer sequences that are completely incorrect. When we
> look up sequences, we have to make sure we only match dependencies against
> pg_class.
>
> AFAICT, the following patch catches the important ones. I could go ahead and
> push it, but given that we're in RC I'd appreciate a round of review before
> doing that, even though it looks fairly simple.
>
> I've got the same changes in a patch to pgadmin3, as these queries are
> basically a copy/paste from there. But let's focus the review on the one for
> pgadmin4 :)
>
> --
>  Magnus Hagander
>  Me: http://www.hagander.net/
>  Work: http://www.redpill-linpro.com/
>
>
> --
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Dave Page
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