Melanie Plageman 6acab8bdbc Refactor autoprewarm_database_main() in preparation for read stream Autoprewarm prewarms blocks from a dump file representing the contents of shared buffers at the time it was dumped. It uses a sorted array of BlockInfoRecords, each representing a block from one of the cluster's databases and tables. autoprewarm_database_main() prewarms all the blocks from a single database. It is optimized to ensure we don't try to open the same relation or fork over and over again if it has been dropped or is invalid. The main loop handled this by carefully setting various local variables to sentinel values when a run of blocks should be skipped. This method won't work with the read stream API. The read stream callback must be able to advance the current position in the BlockInfoRecord array to allow for reading ahead additional blocks, however a read stream maps 1-1 with a relation and fork combination. So, the main loop in autoprewarm_database_main() must also advance the position in the array of BlockInfoRecords to skip invalid relations and forks. This split control doesn't fit well with the current flow control in autoprewarm_database_main() To make it compatible with the read stream API, change autoprewarm_database_main() to explicitly fast-forward in the BlockInfoRecords array past the blocks belonging to an invalid relation or fork. This commit only implements the new control flow -- it does not use the read stream API. Co-authored-by: Nazir Bilal Yavuz <byavuz81@gmail.com> Co-authored-by: Melanie Plageman <melanieplageman@gmail.com> Reviewed-by: Heikki Linnakangas <hlinnaka@iki.fi> Reviewed-by: Daniel Gustafsson <daniel@yesql.se> Discussion: https://postgr.es/m/flat/CAN55FZ3n8Gd%2BhajbL%3D5UkGzu_aHGRqnn%2BxktXq2fuds%3D1AOR6Q%40mail.gmail.com		3 months ago
.github	Add CODE_OF_CONDUCT.md, CONTRIBUTING.md, and SECURITY.md.	1 year ago
config	Optimize popcount functions with ARM SVE intrinsics.	3 months ago
contrib	Refactor autoprewarm_database_main() in preparation for read stream	3 months ago
doc	pg_recvlogical: Add --failover option.	3 months ago
src	Avoid extra index searches through preprocessing.	3 months ago
.cirrus.star	Remove duplicate words in docs and code comments.	2 years ago
.cirrus.tasks.yml	aio: Add io_method=io_uring	3 months ago
.cirrus.yml	ci: Test NetBSD and OpenBSD	5 months ago
.dir-locals.el	…
.editorconfig	Add script to keep .editorconfig in sync with .gitattributes	5 months ago
.git-blame-ignore-revs	Add commit `e1a8b1ad58` to .git-blame-ignore-revs.	3 months ago
.gitattributes	Add script to keep .editorconfig in sync with .gitattributes	5 months ago
.gitignore	Update top-level .gitignore.	3 years ago
.mailmap	Add a Git .mailmap file	8 months ago
COPYRIGHT	Update copyright for 2025	6 months ago
GNUmakefile.in	Allow selecting the git revision to be packaged by "make dist".	1 year ago
HISTORY	…
Makefile	Remove AIX support	1 year ago
README.md	Revise the style of a paragraph in README.md.	1 year ago
aclocal.m4	autoconf: Move export_dynamic determination to configure	3 years ago
configure	libpq: Add support for dumping SSL key material to file	3 months ago
configure.ac	libpq: Add support for dumping SSL key material to file	3 months ago
meson.build	libpq: Add support for dumping SSL key material to file	3 months ago
meson_options.txt	aio: Add liburing dependency	3 months ago

README.md

PostgreSQL Database Management System

This directory contains the source code distribution of the PostgreSQL database management system.

PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.

General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.

The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.