org.apache.tajo.plan.expr

Class FieldEval

java.lang.Object

org.apache.tajo.plan.expr.EvalNode

org.apache.tajo.plan.expr.FieldEval

All Implemented Interfaces:

Cloneable, ProtoObject<PlanProto.EvalNodeTree>, GsonObject

public class FieldEval
extends EvalNode
implements Cloneable

Field Summary

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

type

Constructor Summary

Constructors

Constructor and Description
FieldEval(Column column)
FieldEval(String columnName, TajoDataTypes.DataType domain)

Method Summary

Methods

Modifier and Type	Method and Description
int	childNum()
Object	clone()
boolean	equals(Object obj)
Datum	eval(Schema schema, Tuple tuple)
EvalNode	getChild(int idx)
String	getColumnName()
Column	getColumnRef()
String	getName()
String	getQualifier()
TajoDataTypes.DataType	getValueType()
int	hashCode()
void	postOrder(EvalNodeVisitor visitor)
void	preOrder(EvalNodeVisitor visitor)
void	replaceColumnRef(String columnName)
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

Constructor Detail

FieldEval

public FieldEval(String columnName,
         TajoDataTypes.DataType domain)

FieldEval

public FieldEval(Column column)

Method Detail

eval

public Datum eval(Schema schema,
         Tuple tuple)

Specified by:

eval in class EvalNode

getValueType

public TajoDataTypes.DataType getValueType()

Specified by:

getValueType in class EvalNode

childNum

public int childNum()

Specified by:

childNum in class EvalNode

getChild

public EvalNode getChild(int idx)

Specified by:

getChild in class EvalNode

getColumnRef

public Column getColumnRef()

getQualifier

public String getQualifier()

getColumnName

public String getColumnName()

replaceColumnRef

public void replaceColumnRef(String columnName)

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