Patents Represented by Attorney Howard Spright

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  • Using a correlation factor to derive join costing statistics
    Patent number: 7747609
    Abstract: Deriving join cost demographics for a binary join, i.e., a join between two relations each having a join column, includes using a correlation factor related to the ratio of unique join column values stored in each of a plurality of units of storage to the total number of unique values in the join column.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: June 29, 2010
    Assignee: Teradata US, Inc.
    Inventors: Grace K. Au, Bibhu Ranjan Priyadarshi, Ramakrishna Korlapati, Sanjay Sukumaran Nair