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Small improvements to substring()

From:	Thomas Munro <thomas(dot)munro(at)gmail(dot)com>
To:	PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject:	Small improvements to substring()
Date:	2026-02-14 21:45:55
Message-ID:	CA+hUKGJCBvpSaiXkN+xJn1QcfpFnz+ZntXdPb4BdzAUrqvFRfA@mail.gmail.com
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Hi,

As recently discussed on pgsql-bugs[1], substring() does unnecessary
work that can easily be deleted. Here's a patch to try that.

[1] https://www.postgresql.org/message-id/flat/19406-9867fddddd724fca%40postgresql.org

Attachment	Content-Type	Size
v1-0001-Improve-substring-implementation.patch	text/x-patch	10.0 KB

Responses

Re: Small improvements to substring() at 2026-02-15 13:38:42 from Junwang Zhao
Re: Small improvements to substring() at 2026-02-15 22:50:30 from Chao Li

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