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Changelog

6.2.0 2026-07-29

  • Upgrade to libpg_query 17-6.2.2
  • Add pg_query::summary function
    • This uses the new pg_query_summary C function that significantly improves performance when you need metadata (like a list of referenced tables) but don't need the full parse tree.
  • NodeEnum: Improve performance when iterating over parse tree using nodes and nodes_mut
  • Fix build caching issues in build.rs script

6.1.1 2025-08-22

  • NodeEnum: Support MERGE queries
  • NodeEnum: Support CALL fn() queries
  • NodeEnum: Iterate over IndexElem nodes
  • Derive serde::Serialize for protobuf::ParseResult

6.1.0 2025-04-02

  • Upgrade to libpg_query 17-6.1.0
    • Update to Postgres 17.4, and add recent patches scheduled for Postgres 17.5 (not yet released)
      • Notably, this pulls in support for macOS 15.4 which defines strchrnul in its standard library, fixing builds on up-to-date macOS versions.
    • Deparser improvements
      • Add parenthesis around AT LOCAL / AT TIMEZONE if needed
      • Correctness improvements related to expressions and function calls
  • Upgrade prost dependency to fix build issues on Linux
  • ParseResult: make tables and functions fields public

6.0.0 2024-11-26

  • Upgrade to libpg_query 17-6.0.0
    • Updates to the Postgres 17 parser
    • Deparser improvements:
      • Add support for deparsing JSON_TABLE, JSON_QUERY, JSON_EXISTS, JSON_VALUE
      • Add support for deparsing JSON, JSON_SCALAR, JSON_SERIALIZE
      • Add support for deparsing COPY ... FORCE_NULL(*)
      • Add support for deparsing ALTER COLUMN ... SET EXPRESSION AS
      • Add support for deparsing SET STATISTICS DEFAULT
      • Add support for deparsing SET ACCESS METHOD DEFAULT
      • Add support for deparsing ... AT LOCAL
      • Add support for deparsing merge_action()
      • Add support for deparsing MERGE ... RETURNING
      • Add support for deparsing NOT MATCHED [ BY TARGET ]

5.1.1 2024-10-30

  • Make ParseResult struct public and implement Debug

5.1.0 2024-01-09

  • Update to libpg_query 16-5.1.0
    • Add support for running on Windows
    • Add support for compiling on 32-bit systems
  • Always build C library using "cc" crate
  • Add filter_columns for getting columns that a query filters by
    • This returns the table name (if present) and column name for every column that's referenced in a JOIN or WHERE clause.

5.0.0 2023-12-22

  • Align versioning scheme with that of other pg_query libraries (which is to generally aim to match the libpg_query version)
  • Upgrade to libpg_query 5.0.0
    • Updates to the Postgres 16 parser
    • Multiple deparser improvements

0.8.2 2023-09-11

  • Update bindgen to 0.66.1 to remove transitive dependency on atty and resolve build errors #28

0.8.1 2023-08-07

  • Upgrade to libpg_query 4.2.3
    • Fix builds when compiling with glibc >= 2.38 libpg_query#203
    • Deparser: Add support for COALESCE and other expressions in LIMIT clause libpg_query#199

0.8.0 2023-07-25

  • Upgrade to libpg_query 4.2.2 (Postgres 13 -> 15)
  • Improve ParseResult::tables() to find tables in cast expressions

0.7.0 2022-07-19

  • Adds ParseResult struct with convenience functions to get table and function references
  • Adds ability to deparse a mutated query AST back into a string
  • Adds context-aware query truncation
  • Adds Ruby test suite to ensure feature parity
  • Adds ability to split multi-query strings (#6)
  • Fixes memory leaks in fingerprint and normalize (#8)

0.6.0 and earlier

This crate was previously maintained by @paupino, who now maintains a slimmed down crate: https://github.com/paupino/pg_parse