Patent ID: 11860869
Assignee: AMAZON TECHNOLOGIES, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 2:
3. The system of claim 1,
wherein to provide the OLAP type of query engine with the consistent view of the data set identified for the query, the OLTP query engine is configured to send to the OLAP type of query engine, one or more undo log records applicable to an item of the data obtained for performing the portion the query; and
wherein to apply the consistent view of the data set provided by the OLTP type of engine when evaluating data of the database obtained from the storage node as part of performing the portion of the query the OLAP type of query engine is configured to apply the one or more undo log records to determine a different value of the item of the data to evaluate as part of performing the portion of the query.