| 摘要 |
Techniques are provided for rewriting queries during a database query processing operation to include auxiliary attributes not included in the original query, thus improving processing efficiency. For example, a technique for rewriting a query in a query processing operation includes the following steps. The query is processed in accordance with at least a portion of a data set, producing query results. Data attributes from the query results are analyzed. At least one new predicate from at least one auxiliary data attribute is appended on the query.
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