Re: Make name optional in CREATE STATISTICS

Matthias van de Meent <boekewurm+postgres@gmail.com>

From: Matthias van de Meent <boekewurm+postgres@gmail.com>
To: Simon Riggs <simon.riggs@enterprisedb.com>
Cc: PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Date: 2022-07-07T10:58:37Z
Lists: pgsql-hackers
On Thu, 7 Jul 2022 at 12:55, Simon Riggs <simon.riggs@enterprisedb.com> wrote:
> There are various other ways of doing this and, yes, we could refactor
> other parts of the grammar to make this work. There is a specific
> guideline about patch submission that says the best way to get a patch
> rejected is to include unnecessary changes. With that in mind, let's
> keep the patch simple and exactly aimed at the original purpose.
>
> I'll leave it for committers to decide whether other refactoring is wanted.

Fair enough.

> I have made the comment show that the name is optional, thank you.

The updated comment implies that IF NOT EXISTS is allowed without a
defined name, which is false:

> + *                CREATE STATISTICS [IF NOT EXISTS] [stats_name] [(stat types)]

A more correct version would be

+ *                CREATE STATISTICS [ [IF NOT EXISTS] stats_name ]
[(stat types)]

> Patch v4 attached

Thanks for working on this!


Kind regards,

Matthias van de Meent



Commits

  1. Fix a few issues with REINDEX grammar

  2. Rework grammar for REINDEX

  3. parser: centralize common auxiliary productions

  4. Make the name optional in CREATE STATISTICS.