Horton

Re: relfilenode statistics

Michael Paquier <michael@paquier.xyz>

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From: Michael Paquier <michael@paquier.xyz>
To: Bertrand Drouvot <bertranddrouvot.pg@gmail.com>
Cc: Kirill Reshke <reshkekirill@gmail.com>, Robert Haas <robertmhaas@gmail.com>, pgsql-hackers@lists.postgresql.org
Date: 2025-11-08T23:33:54Z
Lists: pgsql-hackers

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  1. Add more tests for relation statistics with rewrites

On Fri, Nov 07, 2025 at 11:28:27AM +0000, Bertrand Drouvot wrote:
> While there are existing rewrite tests, the stats behavior during rewrites
> doesn't have a good coverage. This patch adds some tests to record some stats
> after different rewrite scenarios.
> 
> That way, we'll be able to test that the stats are still the ones we
> expect after rewrites. Note that it generates a new stats_1.out (which is quite
> large), so we may want to move those new tests to "isolation" instead.

Looking at this part of the patch set for now, not looked at the rest
yet.  This new stats_1.out is 2k lines long, introduced for the tests
related to rewrites as an effect of 2PC.  It seems to me that a split 
into a new stats_rewrite would be justified for this case, to reduce
the output duplication.
--
Michael