mirror of
https://github.com/neondatabase/neon.git
synced 2025-12-23 22:29:58 +00:00
08135910a5
* Fix checkpoint.nextXid update * Add test for cehckpoint.nextXid * Fix indentation of test_next_xid.py * Fix mypy error in test_next_xid.py * Tidy up the test case. * Add a unit test Co-authored-by: Heikki Linnakangas <heikki@zenith.tech>
This module contains utilities for working with PostgreSQL file formats. It's a collection of structs that are auto-generated from the PostgreSQL header files using bindgen, and Rust functions to read and manipulate them. There are also a bunch of constants in `pg_constants.rs` that are copied from various PostgreSQL headers, rather than auto-generated. They mostly should be auto-generated too, but that's a TODO. The PostgreSQL on-disk file format is not portable across different CPU architectures and operating systems. It is also subject to change in each major PostgreSQL version. Currently, this module is based on PostgreSQL v14, but in the future we will probably need a separate copy for each PostgreSQL version. TODO: Currently, there is also some code that deals with WAL records in pageserver/src/waldecoder.rs. That should be moved into this module. The rest of the codebase should not have intimate knowledge of PostgreSQL file formats or WAL layout, that knowledge should be encapsulated in this module.