Re: Asymmetric partition-wise JOIN

On Thu, Jul 15, 2021 at 11:32 AM Andrey Lepikhov <a(dot)lepikhov(at)postgrespro(dot)ru>
wrote:

> On 5/7/21 23:15, Zhihong Yu wrote:
> > On Mon, Jul 5, 2021 at 2:57 AM Andrey Lepikhov
> > <a(dot)lepikhov(at)postgrespro(dot)ru <mailto:a(dot)lepikhov(at)postgrespro(dot)ru>> wrote:
> > + * Can't imagine situation when join relation already
> > exists. But in
> > + * the 'partition_join' regression test it happens.
> > + * It may be an indicator of possible problems.
> >
> > Should a log be added in the above case ?
> I worked more on this case and found more serious mistake. During
> population of additional paths on the existed RelOptInfo we can remove
> some previously generated paths that pointed from a higher-level list of
> subplans and it could cause to lost of subplan links. I prohibit such
> situation (you can read comments in the new version of the patch).
> Also, choosing of a cheapest path after appendrel creation was added.
> Unstable tests were fixed.
>
> --
> regards,
> Andrey Lepikhov
> Postgres Professional
>

Patch is failing the regression, can you please take a look at that.

partition_join ... FAILED 6328 ms

--
Ibrar Ahmed