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

Class MathFuncLongToDouble

java.lang.Object

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

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

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

FuncLogWithBaseLongToDouble, FuncPowerLongToDouble

public abstract class MathFuncLongToDouble
extends VectorExpression

Implement vectorized math function that takes a double (and optionally additional constant argument(s)) and returns long. May be used for functions like ROUND(d, N), Pow(a, p) etc. Do NOT use this for simple math functions like sin/cos/exp etc. that just take a single argument. For those, modify the template ColumnUnaryFunc.txt and expand the template to generate needed classes.

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
MathFuncLongToDouble()
MathFuncLongToDouble(int colNum, int outputColumnNum)

Method Summary

Modifier and Type	Method and Description
protected void	cleanup(DoubleColumnVector outputColVector, int[] sel, boolean selectedInUse, int n)
void	evaluate(VectorizedRowBatch batch) This is the primary method to implement expression logic.
protected abstract double	func(long l)
String	vectorExpressionParameters()

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

displayArrayOfUtf8ByteArrays, displayUtf8Bytes, doTransientInit, doTransientInit, evaluateChildren, getChildExpressions, getChildExpressionsForTransientInit, getColumnParamString, getDescriptor, 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

MathFuncLongToDouble

public MathFuncLongToDouble(int colNum,
                            int outputColumnNum)

MathFuncLongToDouble

public MathFuncLongToDouble()

Method Detail

func

protected abstract double func(long l)

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

cleanup

protected void cleanup(DoubleColumnVector outputColVector,
                       int[] sel,
                       boolean selectedInUse,
                       int n)

vectorExpressionParameters

public String vectorExpressionParameters()

Specified by:

vectorExpressionParameters in class VectorExpression