RE: Problem with default partition pruning

Hi,

>
> Hi,
>
> On 2019/03/23 2:36, Thibaut Madelaine wrote:
> > I tested your last patch and if I didn't mix up patches on the end of
> > a too long week, I get a problem when querying the sub-sub partition:
> >
> > test=# explain select * from test2_0_10 where id = 25;
> > QUERY PLAN
> > ------------------------------------------------------------
> > Seq Scan on test2_0_10 (cost=0.00..25.88 rows=6 width=36)
> > Filter: (id = 25)
> > (2 rows)
>
> The problem here is not really related to partition pruning, but another problem I recently sent an
> email about:
>
> https://www.postgresql.org/message-id/9813f079-f16b-61c8-9ab7-4363cab28d80%40lab.ntt.co.jp
>
> The problem in this case is that *constraint exclusion* is not working, because partition constraint
> is not loaded by the planner. Note that pruning is only used if a query specifies the parent table,
> not a partition.

Thanks for the comments.

I saw that email. Also, I checked that query Thibaut mentioned worked
correctly with Amit's patch discussed in that thread.

Best regards,
Yuzuko Hosoya