System and method for incrementally maintaining non-distributive aggregate functions in a relational database
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United States of America Patent
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Mar 28, 2006
Grant Date -
Jul 1, 2004
app pub date -
Dec 30, 2002
filing date -
Dec 30, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for incrementally maintaining non-distributive aggregate functions in a relational database includes a data storage device in which a relational database is stored. A processor communicates with the data storage device and includes a database maintenance module. The database maintenance module includes a program for incrementally maintaining non-distributive aggregate functions in a relational database. The method embodied in the program includes determining whether all functions in a relational database query are distributive. Based on this determination, a basic propagate phase graph is selectively altered to yield a new propagate phase graph. Changes to an automatic summary table are then applied thereto based on the new propagate phase graph.
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