Rewriting queries to access materialized views that group along an ordered dimension
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United States of America Patent
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Feb 5, 2002
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app pub date -
Jul 27, 1999
filing date -
Jul 27, 1999
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Abstract
A method and apparatus are provided for rewriting aggregate queries to access a materialized view when (1) the queries place a restriction on an ordered dimension, (2) the materialized view aggregates the information referenced in the query and groups by the same dimension, and (3) the materialized view groups the information at a coarser level of granularity than the granularity associated with the restriction contained in the aggregate queries.
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