org.apache.hadoop.hive.ql.ppd
Class OpProcFactory.JoinerPPD

java.lang.Object
  org.apache.hadoop.hive.ql.ppd.OpProcFactory.DefaultPPD
      org.apache.hadoop.hive.ql.ppd.OpProcFactory.JoinerPPD

All Implemented Interfaces:

NodeProcessor

Direct Known Subclasses:

OpProcFactory.JoinPPD

Enclosing class:

OpProcFactory

public static class OpProcFactory.JoinerPPD
extends OpProcFactory.DefaultPPD
implements NodeProcessor

Determines predicates for which alias can be pushed to it's parents. See the comments for getQualifiedAliases function.

Constructor Summary

OpProcFactory.JoinerPPD()

Method Summary

protected Set<String>	getAliases(Node nd, OpWalkerInfo owi)
protected Object	handlePredicates(Node nd, ExprWalkerInfo prunePreds, OpWalkerInfo owi)
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 org.apache.hadoop.hive.ql.ppd.OpProcFactory.DefaultPPD

logExpr, mergeChildrenPred, mergeWithChildrenPred

Methods inherited from class java.lang.Object

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

Constructor Detail

OpProcFactory.JoinerPPD

public OpProcFactory.JoinerPPD()

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

Overrides:

process in class OpProcFactory.DefaultPPD

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

getAliases

protected Set<String> getAliases(Node nd,
                                 OpWalkerInfo owi)
                          throws SemanticException

Throws:

SemanticException

handlePredicates

protected Object handlePredicates(Node nd,
                                  ExprWalkerInfo prunePreds,
                                  OpWalkerInfo owi)
                           throws SemanticException

Throws:

SemanticException