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

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

All Implemented Interfaces:

Transform

public class BucketMapJoinOptimizer
extends Object
implements Transform

this transformation does bucket map join optimization.

Constructor Summary

BucketMapJoinOptimizer()

Method Summary

ParseContext

transform(ParseContext pctx) All transformation steps implement this interface.

Methods inherited from class java.lang.Object

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

Constructor Detail

BucketMapJoinOptimizer

public BucketMapJoinOptimizer()

Method Detail

transform

public ParseContext transform(ParseContext pctx)
                       throws SemanticException

Description copied from interface: Transform

All transformation steps implement this interface.

Specified by:

transform in interface Transform

Parameters:

pctx - input parse context

Returns:

ParseContext

Throws:

SemanticException