org.apache.hadoop.hive.ql.optimizer

Class BucketMapjoinProc

java.lang.Object

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

org.apache.hadoop.hive.ql.optimizer.BucketMapjoinProc

All Implemented Interfaces:

NodeProcessor

public class BucketMapjoinProc
extends AbstractBucketJoinProc
implements NodeProcessor

Field Summary

Fields inherited from class org.apache.hadoop.hive.ql.optimizer.AbstractBucketJoinProc

pGraphContext

Constructor Summary

Constructors

Constructor and Description
BucketMapjoinProc(ParseContext pGraphContext)

Method Summary

Modifier and Type	Method and Description
static void	checkAndConvertBucketMapJoin(ParseContext pGraphContext, MapJoinOperator mapJoinOp, String baseBigAlias, List<String> joinAliases) Check if a mapjoin can be converted to a bucket mapjoin, and do the version if possible.
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 org.apache.hadoop.hive.ql.optimizer.AbstractBucketJoinProc

canConvertMapJoinToBucketMapJoin, checkConvertBucketMapJoin, convertMapJoinToBucketMapJoin, getBucketFilePathsOfPartition, toColumns

Methods inherited from class java.lang.Object

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

Constructor Detail

BucketMapjoinProc

public BucketMapjoinProc(ParseContext pGraphContext)

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

Specified by:

process in class AbstractBucketJoinProc

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

checkAndConvertBucketMapJoin

public static void checkAndConvertBucketMapJoin(ParseContext pGraphContext,
                                                MapJoinOperator mapJoinOp,
                                                String baseBigAlias,
                                                List<String> joinAliases)
                                         throws SemanticException

Check if a mapjoin can be converted to a bucket mapjoin, and do the version if possible.

Throws:

SemanticException