Re: [Proposal] Adding callback support for custom statistics kinds

From: Sami Imseih <samimseih(at)gmail(dot)com>
To: Chao Li <li(dot)evan(dot)chao(at)gmail(dot)com>
Cc: Michael Paquier <michael(at)paquier(dot)xyz>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: [Proposal] Adding callback support for custom statistics kinds
Date: 2025-12-09 21:54:58
Message-ID: CAA5RZ0vQvmatp8VAk6zroyeKDCw+QVq4XmoRNAFogQo6bJEbNQ@mail.gmail.com
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> My point is that, there are many places jumping to “error”, then from “error” goto “done”,
> if an error didn’t happen from the deserialize callback, how end_extra_stats()
> can know if failure happened and takes action accordingly?

IIUC, if *any* error occurs outside of a deserialize callback, first the "error"
code will be called, followed by "done" which will then trigger the
end_extra_stats
callback that will perform the cleanup.

Attached is v6 with a few minor indentation fixes and a correction to
freeing the file in the cleanup callback.

--
Sami Imseih
Amazon Web Services (AWS)

Attachment Content-Type Size
v6-0001-Allow-cumulative-statistics-to-serialize-auxiliar.patch application/octet-stream 27.3 KB

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