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

Class IdentityExpression

java.lang.Object

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

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

All Implemented Interfaces:

Serializable

public class IdentityExpression
extends VectorExpression

An expression representing a column, only children are evaluated.

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
IdentityExpression()
IdentityExpression(int colNum)

Method Summary

Modifier and Type	Method and Description
void	evaluate(VectorizedRowBatch batch) This is the primary method to implement expression logic.
VectorExpressionDescriptor.Descriptor	getDescriptor()
static boolean	isColumnOnly(VectorExpression ve)
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

IdentityExpression

public IdentityExpression()

IdentityExpression

public IdentityExpression(int colNum)

Method Detail

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

isColumnOnly

public static boolean isColumnOnly(VectorExpression ve)

vectorExpressionParameters

public String vectorExpressionParameters()

Specified by:

vectorExpressionParameters in class VectorExpression

getDescriptor

public VectorExpressionDescriptor.Descriptor getDescriptor()

Specified by:

getDescriptor in class VectorExpression