Horton

Re: selecting from partitions and constraint exclusion

Amit Langote <langote_amit_f8@lab.ntt.co.jp>

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From: Amit Langote <Langote_Amit_f8@lab.ntt.co.jp>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Pg Hackers <pgsql-hackers@postgresql.org>
Date: 2019-03-26T00:36:39Z
Lists: pgsql-hackers 
On 2019/03/26 0:21, Robert Haas wrote:
> On Wed, Mar 20, 2019 at 12:37 AM Amit Langote
> <Langote_Amit_f8@lab.ntt.co.jp> wrote:
>> That's because get_relation_constraints() no longer (as of PG 11) includes
>> the partition constraint for SELECT queries.
> 
> What commit made that change?

That would be 9fdb675fc5d2 (faster partition pruning) that got into PG 11.

> This sounds to me like maybe it should be an open item.

I've added this under Older Bugs.

Thanks,
Amit

Commits

  1. Clean up handling of constraint_exclusion and enable_partition_pruning.