net.sf.saffron.opt
Class VolcanoCluster

java.lang.Object
  |
  +--net.sf.saffron.opt.VolcanoCluster

public class VolcanoCluster

extends Object

A VolcanoCluster is a collection of SaffronRelational expressions which have the same environment.

See the comment against net.sf.saffron.oj.xlat.QueryInfo on why you should put fields in that class, not this one.

Since:

27 September, 2001

Version:

$Id: //open/saffron/src/net/sf/saffron/opt/VolcanoCluster.java#6 $

Author:

jhyde

Field Summary

Environment	env
RexNode	originalExpression
(package private) VolcanoPlanner	planner
VolcanoQuery	query
RexBuilder	rexBuilder
RexToSqlTranslator	rexToSqlTranslator
SaffronTypeFactory	typeFactory

Constructor Summary

(package private)

VolcanoCluster(VolcanoQuery query, Environment env, VolcanoPlanner planner, SaffronTypeFactory typeFactory) Creates a cluster.

Method Summary

RexNode	getOriginalExpression()
SaffronPlanner	getPlanner()

Methods inherited from class java.lang.Object

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

Field Detail

env

public final Environment env

typeFactory

public final SaffronTypeFactory typeFactory

query

public final VolcanoQuery query

planner

final VolcanoPlanner planner

originalExpression

public RexNode originalExpression

rexBuilder

public final RexBuilder rexBuilder

rexToSqlTranslator

public RexToSqlTranslator rexToSqlTranslator

Constructor Detail

VolcanoCluster

VolcanoCluster(VolcanoQuery query,
               Environment env,
               VolcanoPlanner planner,
               SaffronTypeFactory typeFactory)

Creates a cluster.

Pre-condition:

planner != null, typeFactory != null

Method Detail

getOriginalExpression

public RexNode getOriginalExpression()

getPlanner

public SaffronPlanner getPlanner()