org.apache.hadoop.hive.ql.ppd

Class PredicateTransitivePropagate

java.lang.Object

org.apache.hadoop.hive.ql.optimizer.Transform

org.apache.hadoop.hive.ql.ppd.PredicateTransitivePropagate

public class PredicateTransitivePropagate
extends Transform

propagates filters to other aliases based on join condition

Constructor Summary

Constructors

Constructor and Description
PredicateTransitivePropagate()

Method Summary

Modifier and Type	Method and Description
static int[][]	getTargets(CommonJoinOperator<JoinDesc> join)
ParseContext	transform(ParseContext pctx) All transformation steps implement this interface.

Methods inherited from class org.apache.hadoop.hive.ql.optimizer.Transform

beginPerfLogging, endPerfLogging, endPerfLogging

Methods inherited from class java.lang.Object

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

Constructor Detail

PredicateTransitivePropagate

public PredicateTransitivePropagate()

Method Detail

transform

public ParseContext transform(ParseContext pctx)
                       throws SemanticException

Description copied from class: Transform

All transformation steps implement this interface.

Specified by:

transform in class Transform

Parameters:

pctx - input parse context

Returns:

ParseContext

Throws:

SemanticException

getTargets

public static int[][] getTargets(CommonJoinOperator<JoinDesc> join)