Techniques for partition pruning

Details Techniques for partition pruning Techniques for partition pruning

2011-06-21

2011-06-21

Robinson, Greta L (Department: 2169)

Data processing: database and file management or data structures

Database and file access

Preparing data for information retrieval

C707S794000, C706S012000, C706S045000

Reexamination Certificate

active

07966330

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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