org.apache.hadoop.hive.ql.optimizer.ppr
Class ExprProcFactory.DefaultExprProcessor

java.lang.Object
  extended by org.apache.hadoop.hive.ql.optimizer.ppr.ExprProcFactory.DefaultExprProcessor
All Implemented Interfaces:
NodeProcessor
Enclosing class:
ExprProcFactory

public static class ExprProcFactory.DefaultExprProcessor
extends Object
implements NodeProcessor

Processor for constants and null expressions. For such expressions the processor simply clones the exprNodeDesc and returns it.


Constructor Summary
ExprProcFactory.DefaultExprProcessor()
           
 
Method Summary
 Object process(Node nd, Stack<Node> stack, NodeProcessorCtx procCtx, 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

ExprProcFactory.DefaultExprProcessor

public ExprProcFactory.DefaultExprProcessor()
Method Detail

process

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


Copyright © 2011 The Apache Software Foundation