org.eigenbase.relopt
Class RelOptCluster

java.lang.Object
  org.eigenbase.relopt.RelOptCluster

public class RelOptCluster
extends Object

A RelOptCluster is a collection of relational 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/dev/farrago/src/org/eigenbase/relopt/RelOptCluster.java#15 $

Author:

jhyde

Field Summary

private Environment	env
private RelMetadataProvider	metadataProvider
private RexNode	originalExpression
private RelOptPlanner	planner
private RelOptQuery	query
private RexBuilder	rexBuilder
private RelDataTypeFactory	typeFactory

Constructor Summary

RelOptCluster(RelOptQuery query, Environment env, RelOptPlanner planner, RelDataTypeFactory typeFactory, RexBuilder rexBuilder)
Creates a cluster.

Method Summary

Environment	getEnv()
RelMetadataProvider	getMetadataProvider()
RexNode	getOriginalExpression()
RelOptPlanner	getPlanner()
RelOptQuery	getQuery()
RexBuilder	getRexBuilder()
RelDataTypeFactory	getTypeFactory()
void	setMetadataProvider(RelMetadataProvider metadataProvider) Overrides the default metadata provider for this cluster.
void	setOriginalExpression(RexNode originalExpression)

Methods inherited from class java.lang.Object

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

Field Detail

env

private final Environment env

typeFactory

private final RelDataTypeFactory typeFactory

query

private final RelOptQuery query

planner

private final RelOptPlanner planner

originalExpression

private RexNode originalExpression

rexBuilder

private final RexBuilder rexBuilder

metadataProvider

private RelMetadataProvider metadataProvider

Constructor Detail

RelOptCluster

RelOptCluster(RelOptQuery query,
              Environment env,
              RelOptPlanner planner,
              RelDataTypeFactory typeFactory,
              RexBuilder rexBuilder)

Creates a cluster.

"Precondition:"

planner != null, typeFactory != null

Method Detail

getEnv

public Environment getEnv()

getQuery

public RelOptQuery getQuery()

getOriginalExpression

public RexNode getOriginalExpression()

setOriginalExpression

public void setOriginalExpression(RexNode originalExpression)

getPlanner

public RelOptPlanner getPlanner()

getTypeFactory

public RelDataTypeFactory getTypeFactory()

getRexBuilder

public RexBuilder getRexBuilder()

getMetadataProvider

public RelMetadataProvider getMetadataProvider()

setMetadataProvider

public void setMetadataProvider(RelMetadataProvider metadataProvider)

Overrides the default metadata provider for this cluster.

Parameters:

metadataProvider - custom provider