Partition pruning with composite partitioning
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United States of America Patent
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Dec 16, 2003
Grant Date -
Dec 19, 2002
app pub date -
Sep 27, 1999
filing date -
Sep 27, 1999
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Abstract
Techniques are disclosed for expanding the concept of partitioning in variety of ways. In particular techniques are provided for performing multiple-dimension partitioning. In multiple-dimension partitioning, a database object is divided into partitions based on one criteria, and each of those resulting partitions is divided into sub-partitions based on a second criteria. The process of partitioning partitions based on different criteria may be repeated across any number of dimensions. Entirely different partitioning techniques may be used for each level of partitioning. The database server takes advantage of partitions when processing queries by selectively accessing a subset of partitions on disk or reducing the number of internal join operations.
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