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

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.exec.vector.expressions.VectorExpression

VectorExpression.Type

Field Summary

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

childExpressions, inputTypes, outputType

Constructor Summary

Constructors

Constructor and Description
CastDecimalToDecimal()
CastDecimalToDecimal(int inputColumn, int outputColumn)

Method Summary

Methods

Modifier and Type	Method and Description
protected void	convert(DecimalColumnVector outV, DecimalColumnVector inV, 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()
int	getInputColumn()
int	getOutputColumn() Returns the index of the output column in the array of column vectors.
void	setInputColumn(int inputColumn)
void	setOutputColumn(int outputColumn)

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

evaluateChildren, getChildExpressions, getInputTypes, getOutputType, setChildExpressions, setInputTypes, setOutputType, toString

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 outputColumn)

CastDecimalToDecimal

public CastDecimalToDecimal()

Method Detail

convert

protected void convert(DecimalColumnVector outV,
           DecimalColumnVector inV,
           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)

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

getOutputColumn

public int getOutputColumn()

Description copied from class: VectorExpression

Returns the index of the output column in the array of column vectors. If not applicable, -1 is returned.

Specified by:

getOutputColumn in class VectorExpression

Returns:

Index of the output column

setOutputColumn

public void setOutputColumn(int outputColumn)

getInputColumn

public int getInputColumn()

setInputColumn

public void setInputColumn(int inputColumn)

getDescriptor

public VectorExpressionDescriptor.Descriptor getDescriptor()

Specified by:

getDescriptor in class VectorExpression