Patent · US Active

Efficient processing of queries in federated database systems

US8538985B2 · kind B2 · utility

101Cited by
1References
17Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMar 11, 2008
Grant dateSep 17, 2013
Priority date
Expiry dateMay 17, 2029

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG06F16/2471
  • WIPO fieldComputer technology
  • WIPO sectorElectrical engineering

Abstract

Methods and apparatus, including computer program products, implementing and using techniques for processing a federated query in a federated database system. A federated query is received at a federated database server. A federated query execution plan is generated based on the received federated query. The federated query execution plan defines one or more source servers of the federated database and a unique subquery to be executed on each of the source servers. The subqueries are distributed to the source servers in accordance with the federated query execution plan. The respective subqueries are executed asynchronously at the source servers. The subquery results are passed to a first designated source server defined in the federated query execution plan. The subquery results are joined and aggregated at the first designated source server into a final query result. The final query result is returned to the federated database server.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.