Query all items in DynamoDb using async/await

queryDynamoAsync.js

// Assumes using serverless-webpack or Node 14+
// See here for more details: https://stackoverflow.com/a/60896150
import DynamoDB from 'aws-sdk/clients/dynamodb';

const docClient = new DynamoDB.DocumentClient();

export const handler = async () => {

  const params = {
    TableName: 'table-name',
    KeyConditionExpression: 'pKey = :pkey and sKey > :skey',
    ExpressionAttributeValues: {
      ':pkey': 'some value',
      ':skey': 123456789,
    },
  };
  
  const getAllItems = async () => {
    
    const getItems = async startKey => {
      if (startKey) {
        params.ExclusiveStartKey = startKey;
      }
      return docClient.query(params).promise();
    };

    let lastEvaluatedKey;
    let items = [];

    // While lastEvaluatedKey is not undefined, keep querying Dynamo table...
    do {
      const result = await getItems(lastEvaluatedKey);
      items = items.concat(result.Items);
      lastEvaluatedKey = result.LastEvaluatedKey;
    } while (lastEvaluatedKey);

    return items;
  };

  const allItems = await getAllItems();
  // Do some more stuff with returned items...
  return 'OK';
}