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41fa02f82b
Upgrade to bindgen 0.59, which has two new abilities: - specify arbitrary #[derive] attributes to attach to generated structs - request explicit padding fields These two features are enough to replace transmute with serde/bincode.
21 lines
1.0 KiB
Plaintext
21 lines
1.0 KiB
Plaintext
This module contains utilities for working with PostgreSQL file
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formats. It's a collection of structs that are auto-generated from the
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PostgreSQL header files using bindgen, and Rust functions to read and
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manipulate them.
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There are also a bunch of constants in `pg_constants.rs` that are copied
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from various PostgreSQL headers, rather than auto-generated. They mostly
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should be auto-generated too, but that's a TODO.
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The PostgreSQL on-disk file format is not portable across different
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CPU architectures and operating systems. It is also subject to change
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in each major PostgreSQL version. Currently, this module is based on
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PostgreSQL v14, but in the future we will probably need a separate
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copy for each PostgreSQL version.
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TODO: Currently, there is also some code that deals with WAL records
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in pageserver/src/waldecoder.rs. That should be moved into this
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module. The rest of the codebase should not have intimate knowledge of
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PostgreSQL file formats or WAL layout, that knowledge should be
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encapsulated in this module.
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