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

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 qu...

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Bibliographische Detailangaben
Hauptverfasser: DIPPER STEFAN, MERX JOHANNES, MINDNICH TOBIAS, WEYERHAEUSER CHRISTOPH, SCHAD JOERG
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Beschreibung
Zusammenfassung: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.