org.apache.pig.newplan.logical.relational

Class LOInnerLoad

java.lang.Object

org.apache.pig.newplan.Operator

org.apache.pig.newplan.logical.relational.LogicalRelationalOperator

org.apache.pig.newplan.logical.relational.LOInnerLoad

public class LOInnerLoad
extends LogicalRelationalOperator

Operator to map the data into the inner plan of LOForEach It can only be used in the inner plan of LOForEach

Field Summary

Fields inherited from class org.apache.pig.newplan.logical.relational.LogicalRelationalOperator

alias, lineNum, mCustomPartitioner, mPinnedOptions, requestedParallelism, schema

Fields inherited from class org.apache.pig.newplan.Operator

annotations, hashPrime, location, name, plan

Constructor Summary

Constructors

Constructor and Description
LOInnerLoad(LogicalPlan plan, LOForEach foreach, ProjectExpression projectExpression)
LOInnerLoad(OperatorPlan plan, LOForEach foreach, int colNum)
LOInnerLoad(OperatorPlan plan, LOForEach foreach, String colAlias)

Method Summary

Methods

Modifier and Type	Method and Description
void	accept(PlanVisitor v) Accept a visitor at this node in the graph.
int	getColNum()
LOForEach	getLOForEach() Get the LOForEach operator that contains this operator as part of inner plan
ProjectExpression	getProjection()
LogicalSchema	getSchema() Get the schema for the output of this relational operator.
boolean	isEqual(Operator other) This is like a shallow equals comparison.
void	resetSchema() Reset the schema to null so that the next time getSchema is called the schema will be regenerated from scratch.
void	setLocation(SourceLocation loc)
boolean	sourceIsBag()
String	toString()

Methods inherited from class org.apache.pig.newplan.logical.relational.LogicalRelationalOperator

checkEquality, fixDuplicateUids, getAlias, getCustomPartitioner, getLineNumber, getRequestedParallelism, isPinnedOption, neverUseForRealSetSchema, pinOption, resetUid, setAlias, setCustomPartitioner, setRequestedParallelism, setSchema

Methods inherited from class org.apache.pig.newplan.Operator

annotate, getAnnotation, getLocation, getName, getPlan, removeAnnotation, setPlan

Methods inherited from class java.lang.Object

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

Constructor Detail

LOInnerLoad

public LOInnerLoad(OperatorPlan plan,
           LOForEach foreach,
           int colNum)

LOInnerLoad

public LOInnerLoad(OperatorPlan plan,
           LOForEach foreach,
           String colAlias)
            throws FrontendException

Throws:

FrontendException

LOInnerLoad

public LOInnerLoad(LogicalPlan plan,
           LOForEach foreach,
           ProjectExpression projectExpression)

Method Detail

getSchema

public LogicalSchema getSchema()
                        throws FrontendException

Description copied from class: LogicalRelationalOperator

Get the schema for the output of this relational operator. This does not merely return the schema variable. If schema is not yet set, this will attempt to construct it. Therefore it is abstract since each operator will need to construct its schema differently.

Specified by:

getSchema in class LogicalRelationalOperator

Returns:

the schema

Throws:

FrontendException

resetSchema

public void resetSchema()

Description copied from class: LogicalRelationalOperator

Reset the schema to null so that the next time getSchema is called the schema will be regenerated from scratch.

Overrides:

resetSchema in class LogicalRelationalOperator

getProjection

public ProjectExpression getProjection()

isEqual

public boolean isEqual(Operator other)
                throws FrontendException

Description copied from class: Operator

This is like a shallow equals comparison. It returns true if two operators have equivalent properties even if they are different objects. Here properties mean equivalent plan and equivalent name.

Specified by:

isEqual in class Operator

Returns:

true if two object have equivalent properties, else false

Throws:

FrontendException

accept

public void accept(PlanVisitor v)
            throws FrontendException

Description copied from class: Operator

Accept a visitor at this node in the graph.

Specified by:

accept in class Operator

Parameters:

v - Visitor to accept.

Throws:

FrontendException

getColNum

public int getColNum()

getLOForEach

public LOForEach getLOForEach()

Get the LOForEach operator that contains this operator as part of inner plan

Returns:

the LOForEach operator

sourceIsBag

public boolean sourceIsBag()

toString

public String toString()

Overrides:

toString in class LogicalRelationalOperator

setLocation

public void setLocation(SourceLocation loc)

Overrides:

setLocation in class Operator