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Modernize and optimize pg_buffercache_pages()

Heikki Linnakangas <heikki.linnakangas@iki.fi>

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Commit: 257c8231bf97a77378f6fedb826b1243f0a41612
Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
Date: 2026-04-07T13:04:48Z
Releases: 19 (unreleased) 
Modernize and optimize pg_buffercache_pages()

Refactor pg_buffercache_pages() to use SFRM_Materialize mode and
construct a tuplestore directly. That's simpler and more efficient
than collecting all the data to a custom array first.

Author: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>
Author: Palak Chaturvedi <chaturvedipalak1911@gmail.com>
Discussion: https://www.postgresql.org/message-id/CAExHW5sMsaz1j+hrdhyo-DJp7JCgJx87=q2iJfOc_9mwYWyvmw@mail.gmail.com

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contrib/pg_buffercache/pg_buffercache_pages.c modified +77 −167

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