org.apache.hadoop.hive.ql.optimizer

Class ConstantPropagate.ConstantPropagateWalker

java.lang.Object

org.apache.hadoop.hive.ql.lib.DefaultGraphWalker

org.apache.hadoop.hive.ql.optimizer.ConstantPropagate.ConstantPropagateWalker

All Implemented Interfaces:

GraphWalker

Enclosing class:

ConstantPropagate

public static class ConstantPropagate.ConstantPropagateWalker
extends DefaultGraphWalker

Walks the op tree in root first order.

Field Summary

Fields inherited from class org.apache.hadoop.hive.ql.lib.DefaultGraphWalker

dispatcher, opStack, retMap, toWalk

Constructor Summary

Constructors

Constructor and Description
ConstantPropagate.ConstantPropagateWalker(Dispatcher disp)

Method Summary

Methods

Modifier and Type	Method and Description
void	walk(Node nd) walk the current operator and its descendants.

Methods inherited from class org.apache.hadoop.hive.ql.lib.DefaultGraphWalker

dispatch, dispatchAndReturn, getDispatchedList, getToWalk, startWalking

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstantPropagate.ConstantPropagateWalker

public ConstantPropagate.ConstantPropagateWalker(Dispatcher disp)

Method Detail

walk

public void walk(Node nd)
          throws SemanticException

Description copied from class: DefaultGraphWalker

walk the current operator and its descendants.

Overrides:

walk in class DefaultGraphWalker

Parameters:

nd - current operator in the graph

Throws:

SemanticException