Horton

Re: [HACKERS] advanced partition matching algorithm for partition-wise join

Etsuro Fujita <etsuro.fujita@gmail.com>

View thread
From: Etsuro Fujita <etsuro.fujita@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Kuntal Ghosh <kuntalghosh.2007@gmail.com>, Ashutosh Bapat <ashutosh.bapat@2ndquadrant.com>, Tomas Vondra <tomas.vondra@2ndquadrant.com>, Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>, Mark Dilger <mark.dilger@enterprisedb.com>, amul sul <sulamul@gmail.com>, Robert Haas <robertmhaas@gmail.com>, Thomas Munro <thomas.munro@gmail.com>, Amit Langote <Langote_Amit_f8@lab.ntt.co.jp>, Rajkumar Raghuwanshi <rajkumar.raghuwanshi@enterprisedb.com>, Etsuro Fujita <fujita.etsuro@lab.ntt.co.jp>, Dmitry Dolgov <9erthalion6@gmail.com>, Antonin Houska <ah@cybertec.at>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2020-04-09T06:33:29Z
Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Suppress unused-variable warning.

  2. Allow partitionwise joins in more cases.

  3. Avoid crash in partitionwise join planning under GEQO.

  4. Disable support for partitionwise joins in problematic cases.

  5. Add plan_cache_mode setting

  6. Add test for partitionwise join involving default partition.

  7. Revise API for partition_rbound_cmp/partition_rbound_datum_cmp.

On Thu, Apr 9, 2020 at 2:36 PM Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Etsuro Fujita <etsuro.fujita@gmail.com> writes:
> > Yeah, partition_bounds_merge() is currently called only from
> > try_partitionwise_join(), which guarantees that the strategies are the
> > same.

> If there's only one caller and there's not likely to ever be more,
> then I tend to agree that you don't need the assertion.

It seems unlikely that partition_bounds_merge() will be called from
more places in the foreseeable future, so I'd still vote for removing
the assertion.

Best regards,
Etsuro Fujita