DynamoDB Javascript pagination test

dbb-pagination-test.js

#!/usr/bin/env node
const AWS = require('aws-sdk');

AWS.config.update({region: 'us-west-2'});

const dynamodb = new AWS.DynamoDB({ apiVersion: '2012-08-10' });

let dbparams_q1 = {
	"TableName": "alive-qa-brain-ddb-tbllivejobs",
	"IndexName": "account_id-job_created_at-index",
	"ProjectionExpression": "job_id",
	"KeyConditionExpression": "account_id = :tag_account_id",
	"Limit": 5,
	"ExpressionAttributeValues": {
		":tag_account_id": {"S": "6f0a8c2e6d514f3e8dce9520d23a75fb"}
	},
	"ReturnConsumedCapacity": "TOTAL"
};

//Here we are starting from the last reported item
let dbparams_q2 = {
	"TableName": "alive-qa-brain-ddb-tbllivejobs",
	"IndexName": "account_id-job_created_at-index",
	"ProjectionExpression": "job_id",
	"KeyConditionExpression": "account_id = :tag_account_id",
	"ExclusiveStartKey": {"account_id":{"S":"6f0a8c2e6d514f3e8dce9520d23a75fb"},"job_id":{"S":"b6408a16663f46f594b4ea8291b4d115"},"job_created_at":{"N":"1520959910535"}},
	"Limit": 5,
	"ExpressionAttributeValues": {
		":tag_account_id": {"S": "6f0a8c2e6d514f3e8dce9520d23a75fb"}
	},
	"ReturnConsumedCapacity": "TOTAL"
};

//Here we are starting from an arbitrary item (2nd reported from Q1), creating ExclusiveStartKey ourselfves
let dbparams_q3 = {
	"TableName": "alive-qa-brain-ddb-tbllivejobs",
	"IndexName": "account_id-job_created_at-index",
	"ProjectionExpression": "job_id",
	"KeyConditionExpression": "account_id = :tag_account_id",
	"ExclusiveStartKey": {"account_id":{"S":"6f0a8c2e6d514f3e8dce9520d23a75fb"},"job_id":{"S":"0204b0cbd25a4dea8fbf1967cdc7d6eb"},"job_created_at":{"N":"1520959245487"}},
	"Limit": 5,
	"ExpressionAttributeValues": {
		":tag_account_id": {"S": "6f0a8c2e6d514f3e8dce9520d23a75fb"}
	},
	"ReturnConsumedCapacity": "TOTAL"
};

dynamodb.query(dbparams_q1, function(err, data) {
	if (err)  {
		console.log(err, err.stack); // an error occurred
	}
	else {
		console.log("Q1: START BEGINNING, 5 items");
		console.log(JSON.stringify(data));

		dynamodb.query(dbparams_q2, function(err, data) {
			if (err)  {
				console.log(err, err.stack); // an error occurred
			}
			else {
				console.log("Q2: START END PAGE 1, 5 items");
				console.log(JSON.stringify(data));

				dynamodb.query(dbparams_q3, function(err, data) {
					if (err)  {
						console.log(err, err.stack); // an error occurred
					}
					else {
						console.log("Q3: START 2nd item page 1, 5 items");
						console.log(JSON.stringify(data));
					}
				});
			}
		});
	}
});