Method and system for improving response time of a query for a partitioned database object
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United States of America Patent
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Sep 21, 2004
Grant Date -
Dec 5, 2002
app pub date -
May 31, 2001
filing date -
May 31, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A method and mechanism to improve the response time of a query that is executed against a partitioned database object. Only a subset or portion of the partitions are accessed during each pass through the partitions, in which only the retrieved portions of the partitions are processed, and in which results can be immediately returned for the query. Processing only a subset of a partition in a given pass permits each partition to be processed multiple times, rather than requiring a first partition to be entirely processed before processing a second partition. In one approach, the query includes a statement to order the result set for a query against a partitioned database object that contains a local index.
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