org.apache.hadoop.hive.ql.optimizer

Class PrunerExpressionOperatorFactory.ColumnExprProcessor

java.lang.Object

org.apache.hadoop.hive.ql.optimizer.PrunerExpressionOperatorFactory.ColumnExprProcessor

All Implemented Interfaces:

NodeProcessor

Direct Known Subclasses:

ExprProcFactory.PPRColumnExprProcessor, LBExprProcFactory.LBPRColumnExprProcessor

Enclosing class:

PrunerExpressionOperatorFactory

public abstract static class PrunerExpressionOperatorFactory.ColumnExprProcessor
extends java.lang.Object
implements NodeProcessor

Processor for column expressions.

Constructor Summary

Constructors

Constructor and Description
ColumnExprProcessor()

Method Summary

Modifier and Type	Method and Description
java.lang.Object	process(Node nd, java.util.Stack<Node> stack, NodeProcessorCtx procCtx, java.lang.Object... nodeOutputs) Generic process for all ops that don't have specific implementations.
protected abstract ExprNodeDesc	processColumnDesc(NodeProcessorCtx procCtx, ExprNodeColumnDesc cd) Process column desc.

Methods inherited from class java.lang.Object

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

Constructor Detail

ColumnExprProcessor

public ColumnExprProcessor()

Method Detail

process

public java.lang.Object process(Node nd,
                                java.util.Stack<Node> stack,
                                NodeProcessorCtx procCtx,
                                java.lang.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

processColumnDesc

protected abstract ExprNodeDesc processColumnDesc(NodeProcessorCtx procCtx,
                                                  ExprNodeColumnDesc cd)

Process column desc. It should be done by subclass.

Parameters:

procCtx -

cd -

Returns: