Method and apparatus for providing query-level security in a database system
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United States of America Patent
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Feb 3, 2009
Grant Date -
Sep 15, 2005
app pub date -
Mar 10, 2004
filing date -
Mar 10, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
One embodiment of the present invention provides a system that facilitates using query signatures to provide security for a database system. During operation, the database system receives a query. Next, the system parses the query to determine a signature for the query. This signature specifies a structure based on operators for the query and is independent of the value of literals in the query. The system then determines if the signature can be found in a signature cache which contains valid query signatures. If so, the system processes the query.
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