Optimization of data repartitioning during parallel query optimization
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United States of America Patent
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Aug 29, 2000
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N/A
app pub date -
Jun 29, 1998
filing date -
Jun 30, 1997
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Abstract
Query evaluation is optimized using parallel optimization techniques to make repartitioning more efficient. Efficiency is improved by recognizing the possible partitioning requirements for achieving parallelism for a query operation, and by recognizing when the partitioning property of data satisfies the partitioning requirements of a query operation. A data base management system in accordance with the invention uses parallel query processing techniques to optimize data repartitioning, or to avoid it altogether.
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