Patent attributes
Techniques are provided for selectively refreshing a materialized view. A portion of a materialized view is refreshed (or updated) while other portions of the materialized view are not refreshed. Thus, the other portions of the materialized view may contain “stale” data that does not accurately reflect current data in the base table(s) upon which the materialized view is based. In one technique, a user indicates the portion of the materialized view that is to be refreshed. In another technique, a user indicates a plurality of portions of a materialized view and it is automatically determined which portion should be refreshed first. Change data that indicates information about changes made to different portions of one or more base tables and/or read data that indicates information about reads to different portions of the materialized view may be taken into account to determine which portion of a materialized view to refresh.
