Posted: 2/Feb/2024
The DynamoDB BatchWriteItem operation can provide a performance boost by allowing you to squeeze in 25 individual PutItem and DeleteItem requests in a single API call - this can be done across multiple tables.
Here is an example that combines PutItem and DeleteItem operations for two different tables (customer, orders):
_,err:=client.BatchWriteItem(context.Background(),&dynamodb.BatchWriteItemInput{RequestItems:map[string][]types.WriteRequest{"customer":[]types.WriteRequest{{PutRequest:&types.PutRequest{Item:map[string]types.AttributeValue{"email":&types.AttributeValueMemberS{Value:"c3@foo.com"},},},},{DeleteRequest:&types.DeleteRequest{Key:map[string]types.AttributeValue{"email":&types.AttributeValueMemberS{Value:"c1@foo.com"},},},},},"orders":[]types.WriteRequest{{PutRequest:&types.PutRequest{Item:map[string]types.AttributeValue{"order_id":&types.AttributeValueMemberS{Value:"oid_1234"},},},},{DeleteRequest:&types.DeleteRequest{Key:map[string]types.AttributeValue{"order_id":&types.AttributeValueMemberS{Value:"oid_4321"},},},},},},})Be aware of the following constraints:
- The total request size cannot exceed 16 MB
BatchWriteItemcannot update items
Recommended reading:BatchWriteItem API doc