org.apache.hadoop.hive.ql.optimizer

Class ConstantPropagateProcFactory.ConstantPropagateReduceSinkProc

java.lang.Object

org.apache.hadoop.hive.ql.optimizer.ConstantPropagateProcFactory.ConstantPropagateReduceSinkProc

All Implemented Interfaces:

NodeProcessor

Enclosing class:

ConstantPropagateProcFactory

public static class ConstantPropagateProcFactory.ConstantPropagateReduceSinkProc
extends Object
implements NodeProcessor

The Node Processor for Constant Propagation for ReduceSink Operators. If the RS Operator is for a join, then only those constants from inner join tables, or from the 'inner side' of a outer join (left table for left outer join and vice versa) can be propagated.

Constructor Summary

Constructors

Constructor and Description
ConstantPropagateProcFactory.ConstantPropagateReduceSinkProc()

Method Summary

Methods

Modifier and Type	Method and Description
Object	process(Node nd, Stack<Node> stack, NodeProcessorCtx ctx, Object... nodeOutputs) Generic process for all ops that don't have specific implementations.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstantPropagateProcFactory.ConstantPropagateReduceSinkProc

public ConstantPropagateProcFactory.ConstantPropagateReduceSinkProc()

Method Detail

process

public Object process(Node nd,
             Stack<Node> stack,
             NodeProcessorCtx ctx,
             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

ctx - 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