System and methodology for parallel query optimization using semantic-based partitioning
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United States of America Patent
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Feb 28, 2012
Grant Date -
Sep 28, 2006
app pub date -
Jun 2, 2005
filing date -
Mar 28, 2005
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Abstract
A system and methodology for parallel query optimization using semantic-based partitioning is described. In one embodiment, for example, in a database system comprising a database storing data in database tables, a method is described for improving query performance by dynamically partitioning the data, the method comprises steps of: receiving a query requesting data from the database; generating a plurality of subplans for executing the query, each subplan including one or more operators for performing relational operations; adding operators for partitioning data and performing a given relational operation in parallel to at least some of the plurality of subplans; and building a plan for execution of the query based, at least in part, upon selecting subplans having favorable execution costs.
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