Re: Remove unneeded cast in heap_xlog_lock.

From: Richard Guo <guofenglinux(at)gmail(dot)com>
To: Chao Li <li(dot)evan(dot)chao(at)gmail(dot)com>
Cc: Kirill Reshke <reshkekirill(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Remove unneeded cast in heap_xlog_lock.
Date: 2025-08-22 01:41:15
Message-ID: CAMbWs4-rZAqry+vmrECn6g7T5R97max67tC1CrAdTO02fx5k1g@mail.gmail.com
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On Fri, Aug 22, 2025 at 9:44 AM Chao Li <li(dot)evan(dot)chao(at)gmail(dot)com> wrote:
> On Aug 21, 2025, at 22:10, Kirill Reshke <reshkekirill(at)gmail(dot)com> wrote:
> I was looking at how PostgreSQL handles VM map bits, when I noticed $subj.
> PFA small refactoring patch.

> LGTM. BufferGetPage() returns a “Page” type, and the receiving variable “page” is of “Page” type as well, so the cast is not needed.

If you run 'git grep', you'll find a lot more instances where the
result of BufferGetPage() is explicitly cast to Page.

git grep -rn "(Page) BufferGetPage" | wc -l
69

Although these casts are unnecessary for sure, I'm not sure if it's
worth making the code changes to fix them.

Thanks
Richard

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