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

Etsuro Fujita <etsuro.fujita@gmail.com>

From: Etsuro Fujita <etsuro.fujita@gmail.com>

To: Kuntal Ghosh <kuntalghosh.2007@gmail.com>

Cc: Tomas Vondra <tomas.vondra@2ndquadrant.com>, Ashutosh Bapat <ashutosh.bapat@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: 2020-04-08T10:12:09Z

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 →

Suppress unused-variable warning.
- 401418ca6a68 13.0 landed
Allow partitionwise joins in more cases.
- c8434d64ce03 13.0 landed
Avoid crash in partitionwise join planning under GEQO.
- 7ad6498fd5a6 12.0 cited
- d70c147fa217 11.3 cited
Disable support for partitionwise joins in problematic cases.
- 7cfdc77023ad 12.0 cited
Add plan_cache_mode setting
- f7cb2842bf47 12.0 cited
Add test for partitionwise join involving default partition.
- 4513d3a4be0b 12.0 cited
Revise API for partition_rbound_cmp/partition_rbound_datum_cmp.
- b0229235564f 11.0 landed

Attachments

fix-compiler-warning.patch (application/octet-stream) patch

Hi Kuntal,

On Wed, Apr 8, 2020 at 4:30 PM Kuntal Ghosh <kuntalghosh.2007@gmail.com> wrote:
> I'm getting the following warning during compilation.
>
> partbounds.c: In function ‘partition_bounds_merge’:
> partbounds.c:1024:21: warning: unused variable ‘inner_binfo’ [-Wunused-variable]
>   PartitionBoundInfo inner_binfo = inner_rel->boundinfo;
>                      ^
> For fixing the same, we can declare inner_binfo as
> PG_USED_FOR_ASSERTS_ONLY as it is not used for any other purpose.

I'd propose to remove an assertion causing this (and  the
outer_binfo/inner_binfo variables) from partition_bounds_merge(),
rather than doing so, because the assertion is redundant, as we have
the same assertion in merge_list_bounds() and merge_range_bounds().
Please find attached a patch.

Best regards,
Etsuro Fujita