Techniques for partition pruning
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United States of America Patent
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Jun 21, 2011
Grant Date -
Feb 3, 2011
app pub date -
Oct 12, 2010
filing date -
May 4, 2005
priority date (Note) -
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Abstract
Techniques are described for performing partition pruning in situations where previous database servers could not. Specifically, techniques are provided for (1) performing partition pruning based on predicates that involve non-prefix subsets of composite partitioning keys, (2) performing partition pruning when a global index access path is used to execute a query, and (3) performing partition pruning when predicates on partitioning columns are OR-ed together. More generally, techniques are described for partition pruning based on a non-contiguous set of not-pruned partitions.
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