Class IsNullTransformer
- java.lang.Object
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- org.apache.iotdb.db.mpp.transformation.dag.transformer.Transformer
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- org.apache.iotdb.db.mpp.transformation.dag.transformer.unary.UnaryTransformer
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- org.apache.iotdb.db.mpp.transformation.dag.transformer.unary.IsNullTransformer
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- All Implemented Interfaces:
LayerPointReader,YieldableReader
public class IsNullTransformer extends UnaryTransformer
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Field Summary
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Fields inherited from class org.apache.iotdb.db.mpp.transformation.dag.transformer.unary.UnaryTransformer
isLayerPointReaderConstant, layerPointReader, layerPointReaderDataType
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Fields inherited from class org.apache.iotdb.db.mpp.transformation.dag.transformer.Transformer
cachedBinary, cachedBoolean, cachedDouble, cachedFloat, cachedInt, cachedLong, cachedTime, currentNull, hasCachedValue
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Constructor Summary
Constructors Constructor Description IsNullTransformer(LayerPointReader layerPointReader, boolean isNot)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description org.apache.iotdb.tsfile.file.metadata.enums.TSDataTypegetDataType()protected voidtransformAndCache()YieldableStateyieldValue()if this method returns YieldableState.YIELDABLE, at least one of the cached field should be set-
Methods inherited from class org.apache.iotdb.db.mpp.transformation.dag.transformer.unary.UnaryTransformer
cacheValue, isConstantPointReader
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Methods inherited from class org.apache.iotdb.db.mpp.transformation.dag.transformer.Transformer
currentBinary, currentBoolean, currentDouble, currentFloat, currentInt, currentLong, currentTime, isCurrentNull, next, readyForNext, yield
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Constructor Detail
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IsNullTransformer
public IsNullTransformer(LayerPointReader layerPointReader, boolean isNot)
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Method Detail
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getDataType
public org.apache.iotdb.tsfile.file.metadata.enums.TSDataType getDataType()
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yieldValue
public final YieldableState yieldValue() throws java.io.IOException, QueryProcessException
Description copied from class:Transformerif this method returns YieldableState.YIELDABLE, at least one of the cached field should be set- Overrides:
yieldValuein classUnaryTransformer- Throws:
java.io.IOExceptionQueryProcessException
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transformAndCache
protected void transformAndCache() throws QueryProcessException, java.io.IOException- Specified by:
transformAndCachein classUnaryTransformer- Throws:
QueryProcessExceptionjava.io.IOException
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