Efficient and scalable data evolution with column oriented databases
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United States of America Patent
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Aug 14, 2012
Grant Date -
Nov 3, 2011
app pub date -
May 3, 2010
filing date -
May 3, 2010
priority date (Note) -
Expired
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Abstract
A method, system and program product for data evolution on column oriented databases is disclosed. For an input evolution operation, reusable and non-reusable attributes are identified. For attributes in a target schema that cannot be reused from the source schema, data and bitmap indexes of those attributes are generated from source data and bitmap indexes. A decompose operation is disclosed for decomposing a table into two tables. A merge operation is disclosed in which only one input table can be reused for mergence. A second merge operation is disclosed in which both input tables cannot be reused for mergence.
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