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.

Field Summary

Fields

Modifier and Type	Field and Description
protected static org.apache.commons.logging.Log	LOG

Constructor Summary

Constructors

Constructor and Description
OpProcFactory.UnionLineage()

Method Summary

Methods

Modifier and Type	Method and Description
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

Field Detail

LOG

protected static final org.apache.commons.logging.Log LOG

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