Method, system, and program for a join operation on a multi-column table and satellite tables including duplicate values
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United States of America Patent
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Apr 16, 2002
Grant Date -
N/A
app pub date -
Jun 25, 1999
filing date -
Jun 25, 1999
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Disclosed is a method, system, and program for performing a join operation on a multi-column table and at least two satellite tables having a join condition. Each satellite table is comprised of multiple rows and at least one join column. The multi-column table is comprised of multiple rows and at least one column corresponding to the join column in each satellite table. A join operation is performed on the rows of the satellite tables to generate concatenated rows of the satellite tables. One of the concatenated rows is joined to the multi-column table and a returned entry from the multi-column table is received. A determination is then made as to whether the returned entry matches the search criteria. If so, a determination is made as to whether one of the satellite tables has duplicates of values in the join column of the returned matching entry or the multi-column table has duplicate entries in the join columns. Returned matching entries are generated for each duplicate value in the satellite tables and duplicate entry in the multi-column table.
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