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From: Chao Li <[email protected]>
To: Michael Paquier <[email protected]>
Cc: Dapeng Wang <[email protected]>
Cc: PostgreSQL-development <[email protected]>
Subject: Re: Fix pgstat_database.c to honor passed database OIDs
Date: Mon, 13 Apr 2026 08:43:53 +0800
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
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> On Apr 13, 2026, at 08:16, Michael Paquier <[email protected]> wrote:
> 
> On Fri, Apr 10, 2026 at 09:01:32PM +0800, Dapeng Wang wrote:
>> Without the patch, calling
>> pg_stat_reset_single_table_counters('pg_shdescription'::regclass)
>> incorrectly updates the current database's stats_reset timestamp
>> while leaving the shared db entry (datid=0) unchanged.
>> 
>> With the patch, the shared db entry's stats_reset is correctly
>> updated, and the current database's timestamp is not affected.
> 
> The coalesce() trick to bypass the fact that the reset timestamp may
> not be reset was a bit ugly, so I have used instead a second reset.
> I have limited the test to check for datid=0, not MyDatabaseId.
> 
> There is a bit down in stats.sql an extra portion of the test where we
> use twice pg_stats_reset().  One reset could be removed, but I have
> left it as-is in case someone decides to shuffle or split things in
> this test script, to avoid problems in the future.
> 
> And fixed that down to v15.
> --
> Michael

Thank you very much for fixing the test and pushing the patch.

Best regards,
--
Chao Li (Evan)
HighGo Software Co., Ltd.
https://www.highgo.com/

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