org.apache.hadoop.hive.ql.optimizer
Class AbstractBucketJoinProc

java.lang.Object
  org.apache.hadoop.hive.ql.optimizer.AbstractBucketJoinProc

All Implemented Interfaces:

NodeProcessor

Direct Known Subclasses:

AbstractSMBJoinProc, BucketMapjoinProc

public abstract class AbstractBucketJoinProc
extends Object
implements NodeProcessor

this transformation does bucket map join optimization.

Constructor Summary

AbstractBucketJoinProc()

AbstractBucketJoinProc(ParseContext pGraphContext)

Method Summary

static List<String>	getBucketFilePathsOfPartition(org.apache.hadoop.fs.Path location, ParseContext pGraphContext)
abstract Object	process(Node nd, Stack<Node> stack, NodeProcessorCtx procCtx, Object... nodeOutputs) Generic process for all ops that don't have specific implementations.
static List<String>	toColumns(List<ExprNodeDesc> keys)

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractBucketJoinProc

public AbstractBucketJoinProc(ParseContext pGraphContext)

AbstractBucketJoinProc

public AbstractBucketJoinProc()

Method Detail

process

public abstract 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

getBucketFilePathsOfPartition

public static List<String> getBucketFilePathsOfPartition(org.apache.hadoop.fs.Path location,
                                                         ParseContext pGraphContext)
                                                  throws SemanticException

Throws:

SemanticException

toColumns

public static List<String> toColumns(List<ExprNodeDesc> keys)