Runtime query modification in data stream management

US8433716B2 · kind B2 · utility

Assignee

• SAP AG · DE

Inventors

• Bernhard Wolf · Poing, DE
• Martin Rosjat · Dresden, DE
• Michael Ameling · Dresden, DE

Key dates

• Filing date: Aug 31, 2009
• Grant date: Apr 30, 2013
• Expiry date: Feb 18, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F16/24568
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A query may execute on stored original stream data obtained from stream data received from at least one data source. The original stream data may be deleted in association with new stream data being received. At least one operator of the query may be duplicated to obtain at least one duplicated operator, and the stored original stream data may be duplicated to obtain duplicated stream data. The at least one duplicated operator may be modified to obtain at least one modified operator and, thereby, a modified query. Original results may be determined based on execution of the at least one operator, and modified results may be determined based on execution of the at least one modified operator. The at least one operator and the original stream data may be replaced with the at least one duplicated operator and the duplicated stream data, to thereby obtain an integrated query for execution.