Resources Contact Us Home
Method and apparatus for optimizing database queries involving aggregation predicates

Image Number 6 for United States Patent #6088524.

A method and apparatus for optimizing a query involving aggregation. Aggregation predicates are represented by a constraint language through which relationships involving aggregation predicates can be shown. As a result, new predicates can be inferred from an initial set of aggregation predicates and optimization techniques which involve inferring new predicates can be applied. It is also shown how to restrict the inferences involving aggregation predicates to only those predicates which will lead to new predicates which are relevant to query optimization. In general, the technique is not limited to query optimization, but may be applied to various applications involving the manipulation of aggregation predicates.

  Recently Added Patents
LED string with a capability to maintain a current path and LED unit thereof
Interaction analysis and prioritization of mobile content
Gaze tracking password input method and device utilizing the same
Generalized AC-DC synchronous rectification techniques for single- and multi-phase systems
Off-loading of processing from a processor blade to storage blades based on processing activity, availability of cache, and other status indicators
Method and apparatus for a cryptographically assisted commercial network system designed to facilitate buyer-driven conditional purchase offers
Multi-touch recognition resistive touch screen for recognizing multi-touch coordinates through capacitor charging time
  Randomly Featured Patents
Image reading apparatus and image forming apparatus provided with the same
Method and apparatus for accessing web services
Active display system and method with optical addressing
Cutter with laser generator that irradiates cutting position on workpiece to facilitate alignment of blade with cutting position
Method and apparatus for extracting low SNR transient signals from noise
Wheelchair back system
Laser survey instrument
Air cleaner with aroma generation
Field effect transistor with narrow bandgap source and drain regions and method of fabrication
Multipurpose car-top rack