@types/pg

What is @types/pg?

The @types/pg package provides TypeScript type definitions for the pg (node-postgres) library, which is a collection of Node.js modules for interfacing with your PostgreSQL database. It enables TypeScript developers to work with pg more efficiently by offering compile-time type checking and IntelliSense support in code editors.

What are @types/pg's main functionalities?

Client Connection

This feature allows you to connect to a PostgreSQL database using the Client class. The code sample demonstrates how to create a new client, connect to the database, execute a simple query, and then close the connection.

import { Client } from 'pg';

const client = new Client();
await client.connect();
await client.query('SELECT NOW()');
await client.end();

Pool Management

This feature enables efficient management of a pool of connections to the PostgreSQL database. The code sample shows how to create a pool, acquire a client from the pool, execute a query, release the client back to the pool, and finally close the pool.

import { Pool } from 'pg';

const pool = new Pool();
const client = await pool.connect();
try {
  const res = await client.query('SELECT NOW()');
} finally {
  client.release();
}
await pool.end();

Query with Parameters

This feature demonstrates how to execute a parameterized query to prevent SQL injection. The code sample illustrates inserting data into a table using parameters for the values.

import { Client } from 'pg';

const client = new Client();
await client.connect();
const text = 'INSERT INTO users(name, email) VALUES($1, $2) RETURNING *';
const values = ['Brian', '[e-mail]'];
const res = await client.query(text, values);
await client.end();

Other packages similar to @types/pg

sequelize

Sequelize is a promise-based Node.js ORM for Postgres, MySQL, MariaDB, SQLite, and Microsoft SQL Server. It features solid transaction support, relations, eager and lazy loading, read replication, and more. Compared to @types/pg, Sequelize offers a higher-level abstraction and includes built-in support for model definition and migrations, making it more suitable for complex applications with extensive database interactions.

typeorm

TypeORM is an ORM that can run in Node.js, Browser, Cordova, PhoneGap, Ionic, React Native, NativeScript, Expo, and Electron platforms and can be used with TypeScript and JavaScript (ES5, ES6, ES7, ES8). It supports many SQL databases, including PostgreSQL, and provides a more feature-rich abstraction over the database compared to @types/pg. It includes features like data-mapper ORM, repository and entity manager, and supports automatic schema generation, migrations, and much more.

knex

Knex.js is a SQL query builder for PostgreSQL, MySQL, and SQLite3, designed to be flexible, portable, and fun to use. It provides features for building complex SQL queries, schema migrations, and seed files. While @types/pg provides type definitions for using pg in TypeScript projects, Knex offers a more versatile query building capability, making it a good choice for applications that require complex queries without the need for an ORM.

README

Installation

npm install --save @types/pg

Summary

This package contains type definitions for pg (https://github.com/brianc/node-postgres).

Details

Files were exported from https://www.github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/pg

Additional Details

• Last updated: Sat, 22 Jul 2017 19:03:51 GMT
• Dependencies: events, stream, pg-types, tls, node
• Global values: none

Credits

These definitions were written by Phips Peter http://pspeter3.com.