Interface EmptyRowsValuesNodeTransformer
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- All Superinterfaces:
IQTreeExtendedTransformer<VariableGenerator>
- All Known Implementing Classes:
EmptyRowsValuesNodeTransformerImpl
public interface EmptyRowsValuesNodeTransformer extends IQTreeExtendedTransformer<VariableGenerator>
Adds placeholder/fake data to Values Node in the edge case when empty rows are projected i.e. VALUES [] () () All database engines which support the VALUES clause do not support expressions such as VALUES () ()
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Method Summary
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Methods inherited from interface it.unibz.inf.ontop.iq.transform.IQTreeExtendedTransformer
transform, transformAggregation, transformConstruction, transformDistinct, transformEmpty, transformExtensionalData, transformFilter, transformInnerJoin, transformIntensionalData, transformLeftJoin, transformNonStandardBinaryNonCommutativeNode, transformNonStandardLeafNode, transformNonStandardNaryNode, transformNonStandardUnaryNode, transformOrderBy, transformSlice, transformTrue, transformUnion, transformValues
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