10911fde08
When registering a buffer with the WAL machinery, the caller assigns it a block reference ID, and replay must read each block back by that same ID. Today these IDs are bare integers assigned by convention (0, 1, 2, ...), which is easy to follow when a record registers a single block, or when the blocks are handled during replay in their registration order. An upcoming bug fix registers up to two visibility map blocks in addition to the heap block(s) when clearing the VM, and these are not handled during replay in a straightforward 1:1, in-registration-order fashion. Relying on bare integers for the block IDs in that case is error-prone. Introduce macros naming the block reference IDs for the heap record types that the upcoming commit extends to register visibility map blocks, so the registration and replay sites refer to the same block by a meaningful name. Author: Melanie Plageman <melanieplageman@gmail.com> Reviewed-by: Robert Haas <robertmhaas@gmail.com> Discussion: https://postgr.es/m/66mqpfyti3qhfttcsv6r2lbvqqd32rrmpn6i47ovrsnvguts46%40gou54xc> Backpatch through: 17
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.
Copyright and license information can be found in the file COPYRIGHT.
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/.