Method and system for processing a query including semi-joins

Provided are a techniques for processing a query including semi-joins. At execution time, a next semi-join is selected from the semi-joins for execution in a current round of semi-join executions. A reporting threshold is determined that indicates a number of record-identifiers to be retrieved for t...

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Bibliographic Details
Main Author FUH YOUIN,LIN FEN-LING,LURIE ANDREI F.,PURCELLTERENCE P.,TSUJI YOICHI,XIA LI
Format Patent
LanguageEnglish
Published 14.03.2007
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:Provided are a techniques for processing a query including semi-joins. At execution time, a next semi-join is selected from the semi-joins for execution in a current round of semi-join executions. A reporting threshold is determined that indicates a number of record-identifiers to be retrieved for the determined semi-join. The selected semi-join is executed until the determined number of record identifiers are retrieved.
Bibliography:Application Number: CN200610110787