Re: nbtree: reduce code redundancy by using _bt_getmeta() in _bt_gettrueroot()

From: Neil Chen <carpenter(dot)nail(dot)cz(at)gmail(dot)com>
To: Chao Li <li(dot)evan(dot)chao(at)gmail(dot)com>
Cc: Postgres hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: nbtree: reduce code redundancy by using _bt_getmeta() in _bt_gettrueroot()
Date: 2026-01-16 08:09:03
Message-ID: CAA3qoJk3KxJ_aCwj1RHwFL53GEUHHu=szh_8j=3+GWE5JPcKUQ@mail.gmail.com
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Hi Chao,

On Thu, Jan 15, 2026 at 4:11 PM Chao Li <li(dot)evan(dot)chao(at)gmail(dot)com> wrote:

>
> I noticed this while reviewing [1]. _bt_gettrueroot() performs the same
> metapage checks as _bt_getmeta(), so using _bt_getmeta() here removes the
> duplicated code.
>
>
It looks good to me. These two code snippets are exactly identical,
so removing the redundant code is reasonable.

As can be seen from the contextual comments, this is not a
performance-critical path either,
so we don’t need to worry about the performance overhead caused by function
calls.

I also checked the changes made in commit dd299df, which essentially does
the same thing for the function _bt_getrootheight.

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