org.apache.hadoop.hive.ql.exec.vector.expressions

Class CastStringToDouble

java.lang.Object

org.apache.hadoop.hive.ql.exec.vector.expressions.VectorExpression

org.apache.hadoop.hive.ql.exec.vector.expressions.CastStringToDouble

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

CastStringToFloat

public class CastStringToDouble
extends VectorExpression

Cast a string to a double. If other functions besides cast need to take a string in and produce a long, you can subclass this class or convert it to a superclass, and implement different "func()" methods for each operation.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.hadoop.hive.ql.exec.vector.expressions.VectorExpression

childExpressions, inputColumnNum, inputDataTypePhysicalVariations, inputTypeInfos, LOG, outputColumnNum, outputDataTypePhysicalVariation, outputTypeInfo

Constructor Summary

Constructors

Constructor and Description
CastStringToDouble()
CastStringToDouble(int inputColumn, int outputColumnNum)

Method Summary

Modifier and Type	Method and Description
void	evaluate(VectorizedRowBatch batch) This is the primary method to implement expression logic.
protected void	func(DoubleColumnVector outputColVector, BytesColumnVector inputColVector, int batchIndex) Convert input string to a double, at position i in the respective vectors.
VectorExpressionDescriptor.Descriptor	getDescriptor()
String	vectorExpressionParameters()

Methods inherited from class org.apache.hadoop.hive.ql.exec.vector.expressions.VectorExpression

displayArrayOfUtf8ByteArrays, displayUtf8Bytes, doTransientInit, doTransientInit, evaluateChildren, getChildExpressions, getChildExpressionsForTransientInit, getColumnParamString, getDoubleValueParamString, getInputDataTypePhysicalVariations, getInputTypeInfos, getLongValueParamString, getOutputColumnNum, getOutputColumnVectorType, getOutputDataTypePhysicalVariation, getOutputTypeInfo, getParamTypeString, getTypeName, init, setChildExpressions, setInputDataTypePhysicalVariations, setInputTypeInfos, setOutputDataTypePhysicalVariation, setOutputTypeInfo, shouldConvertDecimal64ToDecimal, supportsCheckedExecution, toString, transientInit

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

CastStringToDouble

public CastStringToDouble(int inputColumn,
                          int outputColumnNum)

CastStringToDouble

public CastStringToDouble()

Method Detail

func

protected void func(DoubleColumnVector outputColVector,
                    BytesColumnVector inputColVector,
                    int batchIndex)

Convert input string to a double, at position i in the respective vectors.

evaluate

public void evaluate(VectorizedRowBatch batch)
              throws HiveException

Description copied from class: VectorExpression

This is the primary method to implement expression logic.

Specified by:

evaluate in class VectorExpression

Throws:

HiveException

vectorExpressionParameters

public String vectorExpressionParameters()

Specified by:

vectorExpressionParameters in class VectorExpression

getDescriptor

public VectorExpressionDescriptor.Descriptor getDescriptor()

Specified by:

getDescriptor in class VectorExpression