org.apache.hadoop.hive.ql.optimizer.physical
Class SkewJoinResolver
java.lang.Object
org.apache.hadoop.hive.ql.optimizer.physical.SkewJoinResolver
- All Implemented Interfaces:
- PhysicalPlanResolver
public class SkewJoinResolver
- extends Object
- implements PhysicalPlanResolver
An implementation of PhysicalPlanResolver. It iterator each task with a rule
dispatcher for its reducer operator tree, for task with join op in reducer,
it will try to add a conditional task associated a list of skew join tasks.
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
SkewJoinResolver
public SkewJoinResolver()
resolve
public PhysicalContext resolve(PhysicalContext pctx)
throws SemanticException
- Description copied from interface:
PhysicalPlanResolver
- All physical plan resolvers have to implement this entry method.
- Specified by:
resolve
in interface PhysicalPlanResolver
- Returns:
-
- Throws:
SemanticException
Copyright © 2010 The Apache Software Foundation