System and method for parallel computation of frequency histograms on joined tables
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United States of America Patent
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Feb 5, 2013
Grant Date -
Sep 30, 2010
app pub date -
Mar 24, 2009
filing date -
Mar 24, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
According to one embodiment of the present invention, a method for the parallel computation of frequency histograms in joined tables is provided. The method includes reading data in a table row-by-row from a database system using a coordinator unit and distributing each read row to separate worker units. Each worker unit computes a partial frequency histogram for each column in the table in parallel. The partial histograms from the worker units are then merged and the coordinator unit sends the merged frequency histograms to the worker units.
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