org.apache.hadoop.hive.ql.optimizer.lineage
Class OpProcFactory.UnionLineage

java.lang.Object
  org.apache.hadoop.hive.ql.optimizer.lineage.OpProcFactory.DefaultLineage
      org.apache.hadoop.hive.ql.optimizer.lineage.OpProcFactory.UnionLineage

All Implemented Interfaces:

NodeProcessor

Enclosing class:

OpProcFactory

public static class OpProcFactory.UnionLineage
extends OpProcFactory.DefaultLineage
implements NodeProcessor

Union processor. In this case we call mergeDependency as opposed to putDependency in order to account for visits from different parents.

Constructor Summary

OpProcFactory.UnionLineage()

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

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

Constructor Detail

OpProcFactory.UnionLineage

public OpProcFactory.UnionLineage()

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.DefaultLineage

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