Re: pg_amcheck contrib application

From: Mark Dilger <mark(dot)dilger(at)enterprisedb(dot)com>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Noah Misch <noah(at)leadboat(dot)com>, Peter Geoghegan <pg(at)bowt(dot)ie>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, "Andrey M(dot) Borodin" <x4mmm(at)yandex-team(dot)ru>, Stephen Frost <sfrost(at)snowman(dot)net>, Michael Paquier <michael(at)paquier(dot)xyz>, Amul Sul <sulamul(at)gmail(dot)com>, Dilip Kumar <dilipbalaut(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: pg_amcheck contrib application
Date: 2021-04-30 19:41:08
Message-ID: 7A011F15-8C4D-49D5-9633-910A10A12F7B@enterprisedb.com
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> On Apr 30, 2021, at 12:29 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>
> OK, how about this version?

I think that's committable.

The only nitpick might be

- psprintf("toast value %u was expected to end at chunk %d, but ended at chunk %d",
+ psprintf("toast value %u index scan ended early while expecting chunk %d of %d",

When reporting to users about positions within a zero-based indexing scheme, what does "while expecting chunk 3 of 4" mean? Is it talking about the last chunk from the set [0..3] which has cardinality 4, or does it mean the next-to-last chunk from [0..4] which ends with chunk 4, or what? The prior language isn't any more clear than what you have here, so I have no objection to committing this, but the prior language was probably as goofy as it was because it was trying to deal with this issue.

Thoughts?


Mark Dilger
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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