org.apache.hadoop.hive.ql.lib

Interface GraphWalker

All Known Implementing Classes:

ColumnPruner.ColumnPrunerWalker, ConstantPropagate.ConstantPropagateWalker, DefaultGraphWalker, ForwardWalker, GenMapRedWalker, GenSparkWorkWalker, GenTezWorkWalker, PreOrderWalker, TaskGraphWalker, TezWalker

public interface GraphWalker

Interface for operator graph walker.

Method Summary

Methods

Modifier and Type	Method and Description
void	startWalking(Collection<Node> startNodes, HashMap<Node,Object> nodeOutput) starting point for walking.

Method Detail

startWalking

void startWalking(Collection<Node> startNodes,
                HashMap<Node,Object> nodeOutput)
                  throws SemanticException

starting point for walking.

Parameters:

startNodes - list of starting operators

nodeOutput - If this parameter is not null, the call to the function returns the map from node to objects returned by the processors.

Throws:

SemanticException