README.md

libpg-query

The real PostgreSQL parser, exposed for nodejs.

Primarily used for the node.js parser and deparser pgsql-parser

Table of Contents

1. Installation
2. Example
3. Documentation
4. Versions
5. Building a binary distribution
6. Related Projects
7. Credit

Installation

npm install libpg-query

Example

const parser = require('libpg-query');
parser.parseQuery('select 1').then(console.log);

Documentation

query.parseQuery(sql)/parseQuerySync

Parses the sql and returns a Promise for the parse tree (or returns the parse tree directly in the sync version). May reject with/throw a parse error.

The return value is an array, as multiple queries may be provided in a single string (semicolon-delimited, as Postgres expects).

query.parsePlPgSQL(funcsSql)/query.parsePlPgSQLSync(funcsSql)

Parses the contents of a PL/PGSql function, from a CREATE FUNCTION declaration, and returns a Promise for the parse tree (or returns the parse tree directly in the sync version). May reject with/throw a parse error.

Versions

Our latest is built with 16-latest branch from libpg_query

PG Major Version	libpg_query	Branch	npm
16	16-latest	16-latest	[email protected]
15	15-latest	15-latest	[email protected]
14	14-latest	14-latest	[email protected]
13	13-latest	13-latest	[email protected]
12	(n/a)
11	(n/a)
10	10-latest		@1.3.1 (tree)

Building a binary distribution

• Install requirements (npm i)
• npx node-pre-gyp rebuild package
• With appropriate AWS credentials configured, npx node-pre-gyp publish

Or you can run the scripts

npm run binary:build
npm run binary:publish

Related Projects

• libpg_query
• pgsql-parser
• pg_query
• pg_query.go

Credit

This is based on the output of libpg_query. This wraps the static library output and links it into a node module for use in js.

All credit for the hard problems goes to Lukas Fittl.

Additional thanks for node binding Ethan Resnick.

Original Code and License