org.apache.calcite.plan

Class RelOptQuery

java.lang.Object

org.apache.calcite.plan.RelOptQuery

public class RelOptQuery
extends Object

A RelOptQuery represents a set of relational expressions which derive from the same select statement.

Field Summary

Fields

Modifier and Type	Field and Description
static String	CORREL_PREFIX Prefix to the name of correlating variables.
(package private) Map<String,RelNode>	mapCorrelToRel Maps name of correlating variable (e.g.
(package private) AtomicInteger	nextCorrel
private RelOptPlanner	planner

Constructor Summary

Constructors

Constructor and Description
RelOptQuery(RelOptPlanner planner) Deprecated.
RelOptQuery(RelOptPlanner planner, AtomicInteger nextCorrel, Map<String,RelNode> mapCorrelToRel) For use by RelOptCluster only.

Method Summary

Modifier and Type	Method and Description
RelOptCluster	createCluster(RelDataTypeFactory typeFactory, RexBuilder rexBuilder) Deprecated.
String	createCorrel() Deprecated. Use RelOptCluster.createCorrel()
static int	getCorrelOrdinal(String correlName) Deprecated.
RelNode	lookupCorrel(String name) Returns the relational expression which populates a correlating variable.
void	mapCorrel(String name, RelNode rel) Maps a correlating variable to a RelNode.

Methods inherited from class java.lang.Object

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

Field Detail

CORREL_PREFIX

public static final String CORREL_PREFIX

Prefix to the name of correlating variables.

See Also:

Constant Field Values

mapCorrelToRel

final Map<String,RelNode> mapCorrelToRel

Maps name of correlating variable (e.g. "$cor3") to the RelNode which implements it.

planner

private final RelOptPlanner planner

nextCorrel

final AtomicInteger nextCorrel

Constructor Detail

RelOptQuery

@Deprecated
public RelOptQuery(RelOptPlanner planner)

Deprecated.

Creates a query.

Parameters:

planner - Planner

RelOptQuery

RelOptQuery(RelOptPlanner planner,
            AtomicInteger nextCorrel,
            Map<String,RelNode> mapCorrelToRel)

For use by RelOptCluster only.

Method Detail

getCorrelOrdinal

@Deprecated
public static int getCorrelOrdinal(String correlName)

Deprecated.

Converts a correlating variable name into an ordinal, unique within the query.

Parameters:

correlName - Name of correlating variable

Returns:

Correlating variable ordinal

createCluster

@Deprecated
public RelOptCluster createCluster(RelDataTypeFactory typeFactory,
                                               RexBuilder rexBuilder)

Deprecated.

Creates a cluster.

Parameters:

typeFactory - Type factory

rexBuilder - Expression builder

Returns:

New cluster

createCorrel

@Deprecated
public String createCorrel()

Deprecated. Use RelOptCluster.createCorrel()

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

lookupCorrel

public RelNode lookupCorrel(String name)

Returns the relational expression which populates a correlating variable.

mapCorrel

public void mapCorrel(String name,
                      RelNode rel)

Maps a correlating variable to a RelNode.