Package org.apache.drill.exec.expr

Class HiveFuncHolderExpr

java.lang.Object

org.apache.drill.common.expression.LogicalExpressionBase

org.apache.drill.common.expression.FunctionHolderExpression

org.apache.drill.exec.expr.HiveFuncHolderExpr

All Implemented Interfaces:

Iterable<LogicalExpression>, LogicalExpression

public class HiveFuncHolderExpr
extends FunctionHolderExpression
implements Iterable<LogicalExpression>

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.drill.common.expression.LogicalExpression

LogicalExpression.De, LogicalExpression.Se

Field Summary

Fields inherited from class org.apache.drill.common.expression.FunctionHolderExpression

args, nameUsed

Constructor Summary

Constructors

Constructor	Description
HiveFuncHolderExpr(String nameUsed, HiveFuncHolder holder, List<LogicalExpression> args, ExpressionPosition pos)

Method Summary

Modifier and Type	Method	Description
boolean	argConstantOnly(int i)	constant input expected for i'th argument?
HiveFuncHolderExpr	copy(List<LogicalExpression> args)
FuncHolder	getHolder()	Return the underlying function implementation holder.
TypeProtos.MajorType	getMajorType()
int	getSelfCost()
boolean	isAggregating()
boolean	isRandom()	Is the function output non-deterministic?
Iterator<LogicalExpression>	iterator()

Methods inherited from class org.apache.drill.common.expression.FunctionHolderExpression

accept, getFieldReference, getName, setFieldReference, toString

Methods inherited from class org.apache.drill.common.expression.LogicalExpressionBase

getCumulativeCost, getDescription, getPosition, i

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Details

HiveFuncHolderExpr

public HiveFuncHolderExpr(String nameUsed,
 HiveFuncHolder holder,
 List<LogicalExpression> args,
 ExpressionPosition pos)

Method Details

getMajorType

public TypeProtos.MajorType getMajorType()

Specified by:

getMajorType in interface LogicalExpression

Overrides:

getMajorType in class LogicalExpressionBase

iterator

public Iterator<LogicalExpression> iterator()

Specified by:

iterator in interface Iterable<LogicalExpression>

getHolder

public FuncHolder getHolder()

Description copied from class: FunctionHolderExpression

Return the underlying function implementation holder. That is, returns the function declaration.

Specified by:

getHolder in class FunctionHolderExpression

isAggregating

public boolean isAggregating()

Specified by:

isAggregating in class FunctionHolderExpression

Returns:

aggregating function or not

argConstantOnly

public boolean argConstantOnly(int i)

Description copied from class: FunctionHolderExpression

constant input expected for i'th argument?

Specified by:

argConstantOnly in class FunctionHolderExpression

Returns:

True if a constant input is expected for the i'th argument. False otherwise.

isRandom

public boolean isRandom()

Description copied from class: FunctionHolderExpression

Is the function output non-deterministic?

Specified by:

isRandom in class FunctionHolderExpression

copy

public HiveFuncHolderExpr copy(List<LogicalExpression> args)

Specified by:

copy in class FunctionHolderExpression

Returns:

a copy of FunctionHolderExpression, with passed in argument list.

getSelfCost

public int getSelfCost()

Specified by:

getSelfCost in interface LogicalExpression

Overrides:

getSelfCost in class LogicalExpressionBase