org.apache.hadoop.hive.ql.optimizer

Class Optimizer

java.lang.Object

org.apache.hadoop.hive.ql.optimizer.Optimizer

public class Optimizer
extends Object

Implementation of the optimizer.

Constructor Summary

Constructors

Constructor and Description
Optimizer()

Method Summary

Modifier and Type	Method and Description
ParseContext	getPctx()
void	initialize(HiveConf hiveConf) Create the list of transformations.
ParseContext	optimize() Invoke all the transformations one-by-one, and alter the query plan.
void	setPctx(ParseContext pctx)

Methods inherited from class java.lang.Object

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

Constructor Detail

Optimizer

public Optimizer()

Method Detail

initialize

public void initialize(HiveConf hiveConf)

Create the list of transformations.

Parameters:

hiveConf -

optimize

public ParseContext optimize()
                      throws SemanticException

Invoke all the transformations one-by-one, and alter the query plan.

Returns:

ParseContext

Throws:

SemanticException

getPctx

public ParseContext getPctx()

Returns:

the pctx

setPctx

public void setPctx(ParseContext pctx)

Parameters:

pctx - the pctx to set