Building database statistics across a join network using skew values
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United States of America Patent
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Jun 10, 2008
Grant Date -
Sep 28, 2006
app pub date -
Mar 24, 2005
filing date -
Mar 24, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A method that builds column statistics utilizing at least one skew value. The column statistics built using skew values, instead of column statistics built only through random sampling, may be used to more accurately reflect skew values across join networks, and thus enable a query optimizer to better select an access plan that is optimal under current runtime conditions.
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