Technique for compressing columns of data
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United States of America Patent
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Nov 24, 2015
Grant Date -
Sep 11, 2008
app pub date -
Sep 13, 2007
filing date -
Sep 15, 2006
priority date (Note) -
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Abstract
An approach for providing compression of a database table that uses a compiled table algorithm (CTA) that provides leverage. Data within any given column in adjacent rows is often the same as or closely related to its neighbors. Rather than storing data in each column of each row as a specific integer, floating point, or character data value, a field reconstruction instruction is stored that when executed by a decompression engine can reconstruct the data value. The field reconstruction instruction may be bit granular and may depend upon past history given that the data compression engine may preserve state as row data is streamed off a storage device.
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