org.apache.tajo.plan.expr

Class FunctionEval

java.lang.Object

org.apache.tajo.plan.expr.EvalNode

org.apache.tajo.plan.expr.FunctionEval

All Implemented Interfaces:

Cloneable, ProtoObject<PlanProto.EvalNodeTree>, GsonObject

Direct Known Subclasses:

AggregationFunctionCallEval, GeneralFunctionEval

public abstract class FunctionEval
extends EvalNode
implements Cloneable

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	FunctionEval.ParamType

Field Summary

Fields

Modifier and Type	Field and Description
protected EvalNode[]	argEvals
protected FunctionDesc	funcDesc

Fields inherited from class org.apache.tajo.plan.expr.EvalNode

type

Constructor Summary

Constructors

Constructor and Description
FunctionEval(EvalType type, FunctionDesc funcDesc, EvalNode[] argEvals)

Method Summary

Methods

Modifier and Type	Method and Description
int	childNum()
Object	clone()
boolean	equals(Object obj)
abstract Datum	eval(Schema schema, Tuple tuple)
EvalNode[]	getArgs()
EvalNode	getChild(int idx)
FunctionDesc	getFuncDesc()
String	getName()
FunctionEval.ParamType[]	getParamType()
TajoDataTypes.DataType	getValueType()
int	hashCode()
boolean	isDistinct()
void	postOrder(EvalNodeVisitor visitor)
void	preOrder(EvalNodeVisitor visitor)
void	setArg(int idx, EvalNode arg)
void	setArgs(EvalNode[] args)
String	toString()

Methods inherited from class org.apache.tajo.plan.expr.EvalNode

getProto, getType, toJson

Methods inherited from class java.lang.Object

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

Field Detail

funcDesc

protected FunctionDesc funcDesc

argEvals

protected EvalNode[] argEvals

Constructor Detail

FunctionEval

public FunctionEval(EvalType type,
            FunctionDesc funcDesc,
            EvalNode[] argEvals)

Method Detail

getFuncDesc

public FunctionDesc getFuncDesc()

getParamType

public FunctionEval.ParamType[] getParamType()

isDistinct

public boolean isDistinct()

getArgs

public EvalNode[] getArgs()

setArg

public void setArg(int idx,
          EvalNode arg)

setArgs

public void setArgs(EvalNode[] args)

childNum

public int childNum()

Specified by:

childNum in class EvalNode

getChild

public EvalNode getChild(int idx)

Specified by:

getChild in class EvalNode

getValueType

public TajoDataTypes.DataType getValueType()

Specified by:

getValueType in class EvalNode

eval

public abstract Datum eval(Schema schema,
         Tuple tuple)

Specified by:

eval in class EvalNode

getName

public String getName()

Specified by:

getName in class EvalNode

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

clone

public Object clone()
             throws CloneNotSupportedException

Overrides:

clone in class EvalNode

Throws:

CloneNotSupportedException

preOrder

public void preOrder(EvalNodeVisitor visitor)

Specified by:

preOrder in class EvalNode

postOrder

public void postOrder(EvalNodeVisitor visitor)

Specified by:

postOrder in class EvalNode