Package org.apache.calcite.plan

Class RelOptCluster

java.lang.Object

org.apache.calcite.plan.RelOptCluster

public class RelOptCluster
extends java.lang.Object

An environment for related relational expressions during the optimization of a query.

Field Summary

Fields

Modifier and Type	Field	Description
private RelTraitSet	emptyTraitSet
private java.util.Map<java.lang.String,RelNode>	mapCorrelToRel
private MetadataFactory	metadataFactory
private RelMetadataProvider	metadataProvider
private RelMetadataQuery	mq
private java.util.concurrent.atomic.AtomicInteger	nextCorrel
private RexNode	originalExpression
private RelOptPlanner	planner
private RexBuilder	rexBuilder
private RelDataTypeFactory	typeFactory

Constructor Summary

Constructors

Constructor	Description
RelOptCluster(RelOptPlanner planner, RelDataTypeFactory typeFactory, RexBuilder rexBuilder, java.util.concurrent.atomic.AtomicInteger nextCorrel, java.util.Map<java.lang.String,RelNode> mapCorrelToRel)	Creates a cluster.
RelOptCluster(RelOptQuery query, RelOptPlanner planner, RelDataTypeFactory typeFactory, RexBuilder rexBuilder)	Deprecated.

Method Summary

Modifier and Type	Method	Description
static RelOptCluster	create(RelOptPlanner planner, RexBuilder rexBuilder)	Creates a cluster.
CorrelationId	createCorrel()	Constructs a new id for a correlating variable.
MetadataFactory	getMetadataFactory()
RelMetadataProvider	getMetadataProvider()
RelMetadataQuery	getMetadataQuery()	Returns the current RelMetadataQuery.
RexNode	getOriginalExpression()	Deprecated.
RelOptPlanner	getPlanner()
RelOptQuery	getQuery()	Deprecated.
RexBuilder	getRexBuilder()
RelDataTypeFactory	getTypeFactory()
void	invalidateMetadataQuery()	Should be called whenever the current RelMetadataQuery becomes invalid.
void	setMetadataProvider(RelMetadataProvider metadataProvider)	Overrides the default metadata provider for this cluster.
void	setOriginalExpression(RexNode originalExpression)	Deprecated.
RelTraitSet	traitSet()	Returns the default trait set for this cluster.
RelTraitSet	traitSetOf(RelTrait trait)
RelTraitSet	traitSetOf(RelTrait... traits)	Deprecated. For traitSetOf(t1, t2), use traitSet()().replace(t1).replace(t2).

Methods inherited from class java.lang.Object

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

Field Detail

typeFactory

private final RelDataTypeFactory typeFactory

planner

private final RelOptPlanner planner

nextCorrel

private final java.util.concurrent.atomic.AtomicInteger nextCorrel

mapCorrelToRel

private final java.util.Map<java.lang.String,RelNode> mapCorrelToRel

originalExpression

private RexNode originalExpression

rexBuilder

private final RexBuilder rexBuilder

metadataProvider

private RelMetadataProvider metadataProvider

metadataFactory

private MetadataFactory metadataFactory

emptyTraitSet

private final RelTraitSet emptyTraitSet

mq

private RelMetadataQuery mq

Constructor Detail

RelOptCluster

@Deprecated
RelOptCluster(RelOptQuery query,
              RelOptPlanner planner,
              RelDataTypeFactory typeFactory,
              RexBuilder rexBuilder)

Deprecated.

Creates a cluster.

RelOptCluster

RelOptCluster(RelOptPlanner planner,
              RelDataTypeFactory typeFactory,
              RexBuilder rexBuilder,
              java.util.concurrent.atomic.AtomicInteger nextCorrel,
              java.util.Map<java.lang.String,RelNode> mapCorrelToRel)

Creates a cluster.

For use only from create(org.apache.calcite.plan.RelOptPlanner, org.apache.calcite.rex.RexBuilder) and RelOptQuery.

Method Detail

create

public static RelOptCluster create(RelOptPlanner planner,
                                   RexBuilder rexBuilder)

Creates a cluster.

getQuery

@Deprecated
public RelOptQuery getQuery()

Deprecated.

getOriginalExpression

@Deprecated
public RexNode getOriginalExpression()

Deprecated.

setOriginalExpression

@Deprecated
public void setOriginalExpression(RexNode originalExpression)

Deprecated.

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

getMetadataFactory

public MetadataFactory getMetadataFactory()

getMetadataQuery

public RelMetadataQuery getMetadataQuery()

Returns the current RelMetadataQuery.

This method might be changed or moved in future. If you have a RelOptRuleCall available, for example if you are in a RelOptRule.onMatch(RelOptRuleCall) method, then use RelOptRuleCall.getMetadataQuery() instead.

invalidateMetadataQuery

public void invalidateMetadataQuery()

Should be called whenever the current RelMetadataQuery becomes invalid. Typically invoked from RelOptRuleCall.transformTo(org.apache.calcite.rel.RelNode, java.util.Map<org.apache.calcite.rel.RelNode, org.apache.calcite.rel.RelNode>).

createCorrel

public CorrelationId createCorrel()

Constructs a new id for a correlating variable. It is unique within the whole query.

traitSet

public RelTraitSet traitSet()

Returns the default trait set for this cluster.

traitSetOf

@Deprecated
public RelTraitSet traitSetOf(RelTrait... traits)

Deprecated.

For traitSetOf(t1, t2), use traitSet()().replace(t1).replace(t2).

traitSetOf

public RelTraitSet traitSetOf(RelTrait trait)