05e263d0d3
* Add submodule postgres-15 * Support pg_15 in pgxn/neon * Renamed zenith -> neon in Makefile * fix name of codestyle check * Refactor build system to prepare for building multiple Postgres versions. Rename "vendor/postgres" to "vendor/postgres-v14" Change Postgres build and install directory paths to be version-specific: - tmp_install/build -> pg_install/build/14 - tmp_install/* -> pg_install/14/* And Makefile targets: - "make postgres" -> "make postgres-v14" - "make postgres-headers" -> "make postgres-v14-headers" - etc. Add Makefile aliases: - "make postgres" to build "postgres-v14" and in future, "postgres-v15" - similarly for "make postgres-headers" Fix POSTGRES_DISTRIB_DIR path in pytest scripts * Make postgres version a variable in codestyle workflow * Support vendor/postgres-v15 in codestyle check workflow * Support postgres-v15 building in Makefile * fix pg version in Dockerfile.compute-node * fix kaniko path * Build neon extensions in version-specific directories * fix obsolete mentions of vendor/postgres * use vendor/postgres-v14 in Dockerfile.compute-node.legacy * Use PG_VERSION_NUM to gate dependencies in inmem_smgr.c * Use versioned ECR repositories and image names for compute-node. The image name format is compute-node-vXX, where XX is postgres major version number. For now only v14 is supported. Old format unversioned name (compute-node) is left, because cloud repo depends on it. * update vendor/postgres submodule url (zenith->neondatabase rename) * Fix postgres path in python tests after rebase * fix path in regress test * Use separate dockerfiles to build compute-node: Dockerfile.compute-node-v15 should be identical to Dockerfile.compute-node-v14 except for the version number. This is a hack, because Kaniko doesn't support build ARGs properly * bump vendor/postgres-v14 and vendor/postgres-v15 * Don't use Kaniko cache for v14 and v15 compute-node images * Build compute-node images for different versions in different jobs Co-authored-by: Heikki Linnakangas <heikki@neon.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.