lambdaDynamoDbScan.js

var AWS = require('aws-sdk');
var dynamodb = new AWS.DynamoDB({ apiVersion: '2012-08-10' });
var docClient = new AWS.DynamoDB.DocumentClient()
var params = {
    TableName: "mytable",
    FilterExpression: "#schedule_type = :schedule_type_val",
    ExpressionAttributeNames: {
        "#schedule_type": "schedule_type",
    },
    // we can narrow the returned result - still does a full-scan
    ExpressionAttributeValues: { ":schedule_type_val": 'ByTime' }
    // ExpressionAttributeValues: { ":schedule_type_val": 'Random' }

};

var count = 0;
exports.handler = function(event, context) {
    var tableName = tablename;
    docClient.scan(params, onScan);
    function onScan(err, data) {
        if (err) {
            console.error('Error JSON:', JSON.stringify(err,null,2));
        }
        else {
          data.Items.forEach(function(itemdata) {
                console.log("Item :", ++count);
            });
            if (typeof data.LastEvaluatedKey != "undefined") {
                // console.log("Scanning for more...");
                params.ExclusiveStartKey = data.LastEvaluatedKey;
                docClient.scan(params, onScan);
            }
        }
    }
}