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Type:
Bug
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Status: Closed
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Priority:
Major
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Resolution: Fixed
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Affects Version/s: None
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Fix Version/s: 1.7.0
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Component/s: None
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Labels:None
Following CALCITE-996, RelBuilder should simplify predicates in other situations, such as the and method and the join method.
RelBuilder.filter(false) and RelBuilder.limit(0, 0) should simplify to RelBuilder.empty(), a new method that returns an empty relation. The default implementation returns a Values with no rows, but schema-on-query systems such as Drill might override the empty method.