Access to Postgres with node.js

node_postgres_test.js

var pg = require("pg");
pg.connect('pg://postgres:password@localhost:5432/postgres', function(err, client) {
  if (err) { console.log(err) ; } else {
    client.query("select tablename from pg_tables;", function(err, result) {
      if (err) {console.log(err)} else 
        { for (var i=0; i < result.rows.length; i++) { console.log(result.rows[i].tablename) }
      }
    });
  }
})

/*
$ node node_postgres_test.js
=>
pg_type
pg_attribute
pg_statistic
sql_features
sql_implementation_info
sql_languages
sql_packages
pg_database
pg_authid
sql_parts 
*/