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I'm trying to delete all items in a DynamoDB table that has both partition and sort keys using AWS CLI in bash. The best thing I've found so far is:
aws dynamodb scan --table-name $TABLE_NAME --attributes-to-get "$KEY" \
--query "Items[].$KEY.S" --output text | \
tr "\t" "\n" | \
xargs -t -I keyvalue aws dynamodb delete-item --table-name $TABLE_NAME \
--key "{\"$KEY\": {\"S\": \"keyvalue\"}}"
But this does not work with a table that has both the partition key and the sort key, and I have not yet been able to make it work with such a table. Any idea how to modify the script to make it work for a table with composite keys?
699
With the DynamoDB API, you use the DeleteItem action to delete data from a table, one item at a time. You must specify the item's primary key values. In addition to DeleteItem , Amazon DynamoDB supports a BatchWriteItem action for deleting multiple items at the same time.
You can not query only using a Sort Key. You need to specify a partition key to perform query operations. Else, you need to create a global secondary index or perform a scan operation.
Generally in DynamoDB you can create Local Secondary Indexes if you need alternative sort key: To give your application a choice of sort keys, you can create one or more local secondary indexes on an Amazon DynamoDB table and issue Query or Scan requests against these indexes.
I've created a node module to do this:
https://www.npmjs.com/package/dynamodb-empty
yarn global add dynamodb-empty
dynamodb-empty --table tableName
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