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

Class CastDecimalToDecimal

java.lang.Object

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

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

All Implemented Interfaces:

Serializable

public class CastDecimalToDecimal
extends VectorExpression

Cast a decimal to a decimal, accounting for precision and scale changes. If other functions besides cast need to take a decimal in and produce a decimal, you can subclass this class or convert it to a superclass, and implement different methods for each operation. If that's done, the convert() method should be renamed to func() for consistency with other similar super classes such as FuncLongToDecimal.

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
CastDecimalToDecimal()
CastDecimalToDecimal(int inputColumn, int outputColumnNum)

Method Summary

Modifier and Type	Method and Description
protected void	convert(DecimalColumnVector outputColVector, DecimalColumnVector inputColVector, int i) Convert input decimal value to a decimal with a possibly different precision and scale, at position i in the respective vectors.
void	evaluate(VectorizedRowBatch batch) Cast decimal(p1, s1) to decimal(p2, s2).
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

CastDecimalToDecimal

public CastDecimalToDecimal(int inputColumn,
                            int outputColumnNum)

CastDecimalToDecimal

public CastDecimalToDecimal()

Method Detail

convert

protected void convert(DecimalColumnVector outputColVector,
                       DecimalColumnVector inputColVector,
                       int i)

Convert input decimal value to a decimal with a possibly different precision and scale, at position i in the respective vectors.

evaluate

public void evaluate(VectorizedRowBatch batch)
              throws HiveException

Cast decimal(p1, s1) to decimal(p2, s2). The precision and scale are recorded in the input and output vectors, respectively.

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