org.apache.hadoop.hive.ql.optimizer
Class SetReducerParallelism

java.lang.Object
  org.apache.hadoop.hive.ql.optimizer.SetReducerParallelism

All Implemented Interfaces:

NodeProcessor

public class SetReducerParallelism
extends Object
implements NodeProcessor

SetReducerParallelism determines how many reducers should be run for a given reduce sink.

Constructor Summary

SetReducerParallelism()

Method Summary

Object

process(Node nd, Stack<Node> stack, NodeProcessorCtx procContext, Object... nodeOutputs) Generic process for all ops that don't have specific implementations.

Methods inherited from class java.lang.Object

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

Constructor Detail

SetReducerParallelism

public SetReducerParallelism()

Method Detail

process

public Object process(Node nd,
                      Stack<Node> stack,
                      NodeProcessorCtx procContext,
                      Object... nodeOutputs)
               throws SemanticException

Description copied from interface: NodeProcessor

Generic process for all ops that don't have specific implementations.

Specified by:

process in interface NodeProcessor

Parameters:

nd - operator to process

procContext - operator processor context

nodeOutputs - A variable argument list of outputs from other nodes in the walk

Returns:

Object to be returned by the process call

Throws:

SemanticException