ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,475,121, issued on Nov. 18.
"Hybrid cost model for evaluating query execution plans" was invented by Seyed Mohammad Amin Kamali (Orleans, Canada), Vincent Corvinelli (Mississauga, Canada), Calisto Zuzarte (Pickering, Canada), Brandon Lewis Frendo (Markham, Canada), Vasiliki Kantere (Ottawa) and Ning Wang (Ottawa).
According to the abstract* released by the U.S. Patent & Trademark Office: "Aspects of the disclosure include hybrid cost model-based techniques for evaluating query execution plans. A non-limiting example method includes inputting, to a plurality of base cost models including one or more learned cost models and a classic cost model, a query and a search space including a p...