Performing a join in a partitioned database system
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United States of America Patent
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Sep 13, 2005
Grant Date -
N/A
app pub date -
Dec 10, 2003
filing date -
Dec 10, 2003
priority date (Note) -
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Abstract
A method of performing a join includes identifying a join that identifies a first table and a second table. The first table includes a plurality of first table rows. Each of the plurality of first table rows are grouped into one of a plurality of first table partitions. The second table includes one or more second table rows. Each of the plurality of second table rows are grouped into one or more second table partitions. A determination is made as to whether the first table and the second table are joined on equality constraints. The one or more first table rows are joined with the one or more second table rows using a rowkey merge join where equality exists.
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