Using a materialized view to process a related query containing an antijoin
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United States of America Patent
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Sep 10, 2002
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N/A
app pub date -
Dec 28, 1998
filing date -
Dec 28, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
A method and apparatus for transforming queries is provided. A select-project-join query Q that specifies an antijoin is rewritten into another query that references the materialized view M. The common section includes the tables being antijoined, and may be one-to-many lossless with respect to the join with the materialized view delta.
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