APPARATUS AND SYSTEM FOR REDUCING LOCKING IN MATERIALIZED QUERY TABLES

摘要

Disclosed is an apparatus and system for reducing locking in materialized query tables (MQT) for distributive functions. The apparatus includes an insert module that inserts into an MQT table a child record when a new record is inserted into a base table associated with the MQT. The child record includes values associated with the insert operation. Also included is a delete module that inserts into the MQT a child record that includes measure values that are the negative of the measure values in the base table row that is the subject of the delete operation. An update module inserts two child rows into the MQT, one negating the affected record and the other adding the values of the update operation. Each inserted child row includes a unique identifier that relates the inserted row to a parent row. An execution module generates responses using the values indicated by the cumulative records in a family.