This method allows executed queries to be retrieved as array entries. It supports a generic interface in order to type the entries retrieved by the query

import { Client } from "https://deno.land/x/postgres/mod.ts";
const client = new Client();
const transaction = client.createTransaction("transaction");

const {rows} = await transaction.queryArray(
 "SELECT ID, NAME FROM CLIENTS"
); // Array<unknown[]>

You can pass type arguments to the query in order to hint TypeScript what the return value will be

import { Client } from "https://deno.land/x/postgres/mod.ts";
const client = new Client();
const transaction = client.createTransaction("transaction");

const { rows } = await transaction.queryArray<[number, string]>(
 "SELECT ID, NAME FROM CLIENTS"
); // Array<[number, string]>

It also allows you to execute prepared stamements with template strings

import { Client } from "https://deno.land/x/postgres/mod.ts";
const client = new Client();
const transaction = client.createTransaction("transaction");

const id = 12;
// Array<[number, string]>
const { rows } = await transaction.queryArray<[number, string]>`SELECT ID, NAME FROM CLIENTS WHERE ID = ${id}`;

Use the configuration object for more advance options to execute the query

import { Client } from "https://deno.land/x/postgres/mod.ts";
const my_client = new Client();
const { rows } = await my_client.queryArray<[number, string]>({
  text: "SELECT ID, NAME FROM CLIENTS",
  name: "select_clients",
}); // Array<[number, string]>

Execute prepared statements with template strings

import { Client } from "https://deno.land/x/postgres/mod.ts";
const my_client = new Client();

const id = 12;
// Array<[number, string]>
const {rows} = await my_client.queryArray<[number, string]>`SELECT ID, NAME FROM CLIENTS WHERE ID = ${id}`;