System for optimizing query processing in a relational database
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United States of America Patent
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Feb 25, 1992
Grant Date -
N/A
app pub date -
Jan 25, 1989
filing date -
Jan 29, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for processing a database for analyzing a query to the database from a user to determine an internal processing procedure therefor and executing it comprises the steps of preparing single or a plurality of internal processing procedures based on analysis result of the query including a variable inputted in a preprocess step and statistical information of a database system, selecting an optimum one of the internal processing procedures based on a value substituted for the variable of the query in a query execution stage and the statistical information of the database system, and executing the query in accordance with the selected internal processing procedure.
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