org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators

Class UnaryComparisonOperator

java.lang.Object

org.apache.pig.impl.plan.Operator<PhyPlanVisitor>

org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator

org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.ExpressionOperator

org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.UnaryExpressionOperator

org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.UnaryComparisonOperator

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.lang.Comparable<Operator>, ComparisonOperator, Illustrable

Direct Known Subclasses:

POIsNull, PONot

public abstract class UnaryComparisonOperator
extends UnaryExpressionOperator
implements ComparisonOperator

This is a base class for all unary comparison operators. Supports the use of operand type instead of result type as the result type is always boolean.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator

PhysicalOperator.OriginalLocation

Field Summary

Fields

Modifier and Type	Field and Description
protected byte	operandType

Fields inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator

alias, illustrator, input, inputAttached, inputs, lineageTracer, outputs, parentPlan, pigLogger, reporter, requestedParallelism, res, RESULT_EMPTY, RESULT_EOP, resultType

Fields inherited from class org.apache.pig.impl.plan.Operator

mKey

Constructor Summary

Constructors

Constructor and Description
UnaryComparisonOperator(OperatorKey k)
UnaryComparisonOperator(OperatorKey k, int rp)

Method Summary

Methods

Modifier and Type	Method and Description
byte	getOperandType() Determine the type of the operand(s) of this comparator.
Tuple	illustratorMarkup(java.lang.Object in, java.lang.Object out, int eqClassIndex) input tuple mark up to be illustrate-able
void	setOperandType(byte operandType) Set the type of the operand(s) of this comparator.

Methods inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.UnaryExpressionOperator

cloneHelper, getChildExpressions, getExpr, setExpr, setInputAsExpr, supportsMultipleInputs

Methods inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.ExpressionOperator

accumChild, clone, containUDF, getNextDataBag, setIllustrator, supportsMultipleOutputs, toString, visit

Methods inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator

addOriginalLocation, addOriginalLocation, attachInput, cloneHelper, copyAliasFrom, detachInput, getAlias, getAliasString, getIllustrator, getInputs, getLogger, getNext, getNextBigDecimal, getNextBigInteger, getNextBoolean, getNextDataByteArray, getNextDateTime, getNextDouble, getNextFloat, getNextInteger, getNextLong, getNextMap, getNextString, getNextTuple, getOriginalLocations, getPigLogger, getReporter, getRequestedParallelism, getResultType, isAccumStarted, isAccumulative, isBlocking, isInputAttached, processInput, reset, setAccumEnd, setAccumStart, setAccumulative, setInputs, setParentPlan, setPigLogger, setReporter, setRequestedParallelism, setResultType, staticDataCleanup

Methods inherited from class org.apache.pig.impl.plan.Operator

compareTo, equals, getOperatorKey, getProjectionMap, hashCode, name, regenerateProjectionMap, rewire, unsetProjectionMap

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.ComparisonOperator

getNextBoolean, getNextDataBag, getNextDataByteArray, getNextDateTime, getNextDouble, getNextFloat, getNextInteger, getNextLong, getNextMap, getNextString, getNextTuple

Field Detail

operandType

protected byte operandType

Constructor Detail

UnaryComparisonOperator

public UnaryComparisonOperator(OperatorKey k)

UnaryComparisonOperator

public UnaryComparisonOperator(OperatorKey k,
                       int rp)

Method Detail

getOperandType

public byte getOperandType()

Description copied from interface: ComparisonOperator

Determine the type of the operand(s) of this comparator.

Specified by:

getOperandType in interface ComparisonOperator

Returns:

type, as a byte (using DataType types).

setOperandType

public void setOperandType(byte operandType)

Description copied from interface: ComparisonOperator

Set the type of the operand(s) of this comparator.

Specified by:

setOperandType in interface ComparisonOperator

Parameters:

operandType - Type of the operand(s), as a byte (using DataType types).

illustratorMarkup

public Tuple illustratorMarkup(java.lang.Object in,
                      java.lang.Object out,
                      int eqClassIndex)

Description copied from interface: Illustrable

input tuple mark up to be illustrate-able

Specified by:

illustratorMarkup in interface Illustrable

Parameters:

in - input tuple

out - output tuple before wrapped in ExampleTuple

eqClassIndex - index into equivalence classes in illustrator

Returns:

tuple