Files
neon/libs/postgres_ffi/src/pg_constants_v16.rs
Matthias van de Meent 6c6de6382a Use enum-typed PG versions (#12317)
This makes it possible for the compiler to validate that a match block
matched all PostgreSQL versions we support.

## Problem
We did not have a complete picture about which places we had to test
against PG versions, and what format these versions were: The full PG
version ID format (Major/minor/bugfix `MMmmbb`) as transfered in
protocol messages, or only the Major release version (`MM`). This meant
type confusion was rampant.

With this change, it becomes easier to develop new version-dependent
features, by making type and niche confusion impossible.

## Summary of changes
Every use of `pg_version` is now typed as either `PgVersionId` (u32,
valued in decimal `MMmmbb`) or PgMajorVersion (an enum, with a value for
every major version we support, serialized and stored like a u32 with
the value of that major version)

---------

Co-authored-by: Arpad Müller <arpad-m@users.noreply.github.com>
2025-06-24 17:25:31 +00:00

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Rust

use crate::PgMajorVersion;
pub const MY_PGVERSION: PgMajorVersion = PgMajorVersion::PG16;
pub const XACT_XINFO_HAS_DROPPED_STATS: u32 = 1u32 << 8;
pub const XLOG_DBASE_CREATE_FILE_COPY: u8 = 0x00;
pub const XLOG_DBASE_CREATE_WAL_LOG: u8 = 0x10;
pub const XLOG_DBASE_DROP: u8 = 0x20;
pub const BKPIMAGE_APPLY: u8 = 0x02; /* page image should be restored during replay */
pub const BKPIMAGE_COMPRESS_PGLZ: u8 = 0x04; /* page image is compressed */
pub const BKPIMAGE_COMPRESS_LZ4: u8 = 0x08; /* page image is compressed */
pub const BKPIMAGE_COMPRESS_ZSTD: u8 = 0x10; /* page image is compressed */
pub const SIZEOF_RELMAPFILE: usize = 524; /* sizeof(RelMapFile) in relmapper.c */
pub use super::super::v14::bindings::PGDATA_SUBDIRS;
pub fn bkpimg_is_compressed(bimg_info: u8) -> bool {
const ANY_COMPRESS_FLAG: u8 = BKPIMAGE_COMPRESS_PGLZ | BKPIMAGE_COMPRESS_LZ4 | BKPIMAGE_COMPRESS_ZSTD;
(bimg_info & ANY_COMPRESS_FLAG) != 0
}