Get all items from a DynamoDB table using the scan operation

deep-scan.js

function deepScan(scanOperationParams, dynamodbClient) {
  return dynamodbClient
    .scan({
      ConsistentRead: true,
      ...scanOperationParams,
    })
    .promise()
    .then(async ({ Items, LastEvaluatedKey }) => {
      if (!LastEvaluatedKey) {
        return Items;
      }

      const additionalItems = await getAllItemsFromTable({
        ...scanOperationParams,
        ExclusiveStartKey: LastEvaluatedKey,
      });

      return [...Items, ...additionalItems];
    });
}

example.js

const DynamoDB = require(`aws-sdk/clients/dynamodb`);

const deepScan = require(`./deep-scan`);

const dynamodb = new DynamoDB.DocumentClient({
  apiVersion: `2012-08-10`,
  region: `us-east-1`,
});

function getComicBooksByIllustratorName(illustratorName) {
  return deepScan(
    {
      TableName: `ComicBooks`,
      ExpressionAttributeValues: { ":illustratorName": illustratorName },
      FilterExpression: `illustratorName = :illustratorName`,
    },
    dynamodb
  );
}

getComicBooksByIllustratorName(`Frank Miller`);