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DECOUPLING FILTER INJECTION AND EVALULATION BY FORCED PUSHDOWN OF FILTER ATTRIBUTES IN CALCULATION MODELS
DECOUPLING FILTER INJECTION AND EVALULATION BY FORCED PUSHDOWN OF FILTER ATTRIBUTES IN CALCULATION MODELS
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机译:计算模型中过滤物属性的强制按下来分离过滤器的注入和评估。
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摘要
According to an aspect, a system for moving a filter in a query model to ensure query semantics includes a query engine configured to obtain a query model for a query to be executed on a database. The query engine includes a query optimizer configured to instantiate the query model by merging the query with the query model. The query optimizer includes a filter mover configured to move a filter to a point within the instantiated query model such that semantics for the query within the instantiated query model is ensured.
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