org.apache.pig.newplan.logical.optimizer

Class SchemaPatcher

java.lang.Object

org.apache.pig.newplan.logical.optimizer.SchemaPatcher

All Implemented Interfaces:

PlanTransformListener

public class SchemaPatcher
extends java.lang.Object
implements PlanTransformListener

A PlanTransformListener for the logical optimizer that will patch up schemas after a plan has been transformed.

Constructor Summary

Constructors

Constructor and Description
SchemaPatcher()

Method Summary

Modifier and Type	Method and Description
void	transformed(OperatorPlan fp, OperatorPlan tp) Notification that a plan has been transformed.

Methods inherited from class java.lang.Object

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

Constructor Detail

SchemaPatcher

public SchemaPatcher()

Method Detail

transformed

public void transformed(OperatorPlan fp,
                        OperatorPlan tp)
                 throws FrontendException

Description copied from interface: PlanTransformListener

Notification that a plan has been transformed. The listener is free in this method to make changes to the annotations on the plan now that it has been transformed.

Specified by:

transformed in interface PlanTransformListener

Parameters:

fp - the full plan that has been transformed

tp - a plan containing only the operators that have been transformed

Throws:

FrontendException