Copy data from one DynamoDB table to another.

copydyn.js

#!/usr/bin/env node

/* eslint no-console: 0 */
const AWS = require('aws-sdk');
AWS.config.update({ region: 'ap-southeast-2' });
const db = new AWS.DynamoDB.DocumentClient();

const [, , from, to] = [...process.argv];
if (!from || !to) {
  console.error('\n 💥 The "from" and "to" arguments are required.');
  process.exit(1);
}

db.scan({ TableName: from })
  .promise()
  .then((data) => Promise.all(data.Items.map((Item) => db.put({ TableName: to, Item }).promise())))
  .then(() => console.log('\n ✔ Done'))
  .catch((error) => console.log(`\n 💥 ${error.message}`));