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

PhysicalOptimizer(PhysicalContext pctx, HiveConf hiveConf)

Method Summary

PhysicalContext

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

Methods inherited from class java.lang.Object

equals, 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