DynamoDB Batch Update

Question

Is there any API in DynamoDB to update a batch of items? There is an API to write new items in batches (BatchWriteItem) and update single item using UpdateItem, but is it possible to update multiple items in one call?

Answer 1

There is no batch update item API available in DynamoDB at the moment.

DynamoDB API operations list

Answer 2

I know this is an old question by now, but DynamoDB recently added a Transaction api which supports update:

Update — Initiates an UpdateItem operation to edit an existing item's attributes or add a new item to the table if it does not already exist. Use this action to add, delete, or update attributes on an existing item conditionally or without a condition.

https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/transaction-apis.html

Answer 3

BatchWriteItem cannot update items. To update items, use the UpdateItem action. BatchWriteItem operation puts or deletes multiple items in one or more tables

Reference: http://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_BatchWriteItem.html

Answer 4

I use DynamoDBMapper.batchSave(Iterable<? extends Object> objectsToSave) for this purpose.

Answer 5

No there is no batch update currently , you can use a single update Item call and have a workflow over it like AWS SWF or AWS step functions

https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB/DocumentClient.html

Answer 6

I use a dynamoDB update trigger, then I made a template that said to me what items I should modify, I put them on a queue and them read queue messages in other to update one by one