org.apache.hadoop.hive.ql.lib

Interface Dispatcher

All Known Implementing Classes:

AbstractJoinTaskDispatcher, CommonJoinTaskDispatcher, DefaultRuleDispatcher, IndexWhereTaskDispatcher, SortMergeJoinTaskDispatcher

public interface Dispatcher

Dispatcher interface for Operators Used in operator graph walking to dispatch process/visitor functions for operators.

Method Summary

Modifier and Type	Method and Description
java.lang.Object	dispatch(Node nd, java.util.Stack<Node> stack, java.lang.Object... nodeOutputs) Dispatcher function.

Method Detail

dispatch

java.lang.Object dispatch(Node nd,
                          java.util.Stack<Node> stack,
                          java.lang.Object... nodeOutputs)
                   throws SemanticException

Dispatcher function.

Parameters:

nd - operator to process.

stack - operator stack to process.

nodeOutputs - The argument list of outputs from processing other nodes that are passed to this dispatcher from the walker.

Returns:

Object The return object from the processing call.

Throws:

SemanticException