Application of queries against incomplete schemas

Details Application of queries against incomplete schemas Application of queries against incomplete schemas

2003-04-10

2008-12-09

Vital, Pierre M. (Department: 2168)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000, C707S793000

Reexamination Certificate

active

07464073

ABSTRACT:
An improved method, system, and article of manufacture for issuing a query against multiple data sources that may not each contain all the fields involved in the query is provided. A diverse query targeting the multiple data sources may be decomposed into individual query predicates. For each data source, an effective query may be generated by removing, from the diverse query, individual predicates involving fields not contained in the data source. Partial results received in response to issuing the effective queries against their corresponding data sources may be merged using any suitable technique.

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