PostgreSQL Query Parser

pg-query-parser is a Node.js module that provides symmetric parsing and deparsing capabilities for PostgreSQL SQL statements. It leverages the *real* PostgreSQL parser (via `libpg_query`) to convert SQL strings into an Abstract Syntax Tree (AST) and back into a formatted SQL statement. The current stable version is 0.3.0. Its key differentiator is the ability to deparse the AST back into SQL, a functionality not natively available in PostgreSQL itself, enabling developers to programmatically modify parts of a SQL query's AST and serialize the changes back into valid SQL. This makes it useful for building query builders, optimizers, or tools that inspect and transform SQL statements programmatically. Release cadence appears infrequent, with a recent update for `ParamRef` support in v0.2.0, indicating ongoing maintenance.