org.apache.hadoop.hive.ql.optimizer.physical

Class PhysicalOptimizer

java.lang.Object

org.apache.hadoop.hive.ql.optimizer.physical.PhysicalOptimizer

public class PhysicalOptimizer
extends Object

A hierarchy physical optimizer, which contains a list of PhysicalPlanResolver. Each resolver has its own set of optimization rule.

Constructor Summary

Constructors

Constructor and Description
PhysicalOptimizer(PhysicalContext pctx, HiveConf hiveConf)

Method Summary

Methods

Modifier and Type	Method and Description
PhysicalContext	optimize() invoke all the resolvers one-by-one, and alter the physical plan.

Methods inherited from class java.lang.Object

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

Constructor Detail

PhysicalOptimizer

public PhysicalOptimizer(PhysicalContext pctx,
                 HiveConf hiveConf)

Method Detail

optimize

public PhysicalContext optimize()
                         throws SemanticException

invoke all the resolvers one-by-one, and alter the physical plan.

Returns:

PhysicalContext

Throws:

HiveException

SemanticException