const pg = require('pg-then')

const pool = pg.Pool('postgres://username:password@localhost/database')

pool
  .query('SELECT ...')
  .then(...)
  .catch(...)

pg.Pool(config)
  .stream('SELECT ...')
  .on('data', data => ...)
  .on('end', () => ...)
  .on('error', err => ...)

const pg = require('pg-then')

const client = pg.Client('postgres://username:password@localhost/database')

client
  .query('SELECT ...')
  .then(...)
  .catch(...)

// ...

client.end()