PostgreSQL SQL & PL/pgSQL AST Parser (@pgsql/parser)

The `@pgsql/parser` package is a core component within a comprehensive monorepo for PostgreSQL Abstract Syntax Tree (AST) parsing, manipulation, and code generation. It provides a robust, multi-version PostgreSQL parser capable of converting SQL and PL/pgSQL queries into hydrated ASTs, supporting PostgreSQL versions 13 through 17. The current stable version for `@pgsql/parser` is approximately 17.0.4, with active development and frequent updates across the monorepo's packages, such as `@pgsql/deparser` (around 0.7.3). Key differentiators include its direct integration with `libpg-query` (the actual PostgreSQL parser exposed for Node.js), offering high fidelity to PostgreSQL's native parsing logic. It also ships with extensive TypeScript type definitions (`@pgsql/types`), utilities for programmatic AST construction (`@pgsql/utils`), and traversal tools (`@pgsql/traverse`), making it suitable for advanced static analysis, query transformation, and code generation tasks. This library aims to provide a complete toolkit for working with PostgreSQL at the AST level.