Self-adjusting database-query optimizer
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United States of America Patent
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Feb 6, 2018
Grant Date -
Jun 22, 2006
app pub date -
Nov 17, 2005
filing date -
Dec 22, 2004
priority date (Note) -
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Abstract
A database-management system (DBMS) initiates execution of an incoming database query according to an initial query-execution plan that identifies an expected path for execution. Then, at some point after execution of the query has begun, the DBMS concludes that execution has not proceeded along the expected path and, in response, chooses an alternative query-execution plan for continued execution of the query.
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