ALEXANDRIA, Va., July 9 -- United States Patent no. 12,353,417, issued on July 8, was assigned to SAP SE (Walldorf, Germany).
"Disk group-by with sorted merge" was invented by Andreas Amler (Heidelberg, Germany), Till Merker (Sandhausen, Germany) and Nico Bohnsack (Mauer, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "In an example embodiment, a specialized execution process for a Disk Group-By operator with at least one distinct or ordered aggregation is provided. This specialized execution process involves writing all linked lists to disk (optionally this is performed only if the memory budget is coming close to being surpassed). Initially, a separate disk partition can be created per group, but on...