ALEXANDRIA, Va., June 16 -- United States Patent no. 12,657,202, issued on June 16, was assigned to Amazon Technologies Inc. (Seattle).

"Transactionally derived metadata for refreshing local materialized views with external table sources" was invented by Enrico Siragusa (Berlin), Gaurav Saxena (Cupertino, Calif.), Andre Hernich (Berlin), Artem Honcharov (Berlin), Mario Guerriero (Berlin), Panagiotis Parchas (Berlin) and Hinnerk Gildhoff (Hamburg, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "Metadata for external table sources of a local materialized view is transactionally derived. An update to the metadata is identified. Data objects storing respective portions of external tables are determined ac...