org.apache.calcite.plan

Class RelOptMaterialization

java.lang.Object

org.apache.calcite.plan.RelOptMaterialization

public class RelOptMaterialization
extends Object

Records that a particular query is materialized by a particular table.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	RelOptMaterialization.ProjectFilterTable A table scan and optional project mapping and filter condition.

Field Summary

Fields

Modifier and Type	Field and Description
List<String>	qualifiedTableName
RelNode	queryRel
RelOptTable	starRelOptTable
StarTable	starTable
RelNode	tableRel

Constructor Summary

Constructors

Constructor and Description
RelOptMaterialization(RelNode tableRel, RelNode queryRel, RelOptTable starRelOptTable, List<String> qualifiedTableName) Creates a RelOptMaterialization.

Method Summary

Modifier and Type	Method and Description
static RelNode	toLeafJoinForm(RelNode rel) Converts a relational expression to a form where LogicalJoins are as close to leaves as possible.
static RelNode	tryUseStar(RelNode rel, RelOptTable starRelOptTable) Converts a relational expression to one that uses a StarTable.

Methods inherited from class java.lang.Object

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

Field Detail

tableRel

public final RelNode tableRel

starRelOptTable

public final RelOptTable starRelOptTable

starTable

public final StarTable starTable

qualifiedTableName

public final List<String> qualifiedTableName

queryRel

public final RelNode queryRel

Constructor Detail

RelOptMaterialization

public RelOptMaterialization(RelNode tableRel,
                             RelNode queryRel,
                             RelOptTable starRelOptTable,
                             List<String> qualifiedTableName)

Creates a RelOptMaterialization.

Method Detail

tryUseStar

public static RelNode tryUseStar(RelNode rel,
                                 RelOptTable starRelOptTable)

Converts a relational expression to one that uses a StarTable.

The relational expression is already in leaf-join-form, per toLeafJoinForm(org.apache.calcite.rel.RelNode).

Returns:

Rewritten expression, or null if expression cannot be rewritten to use the star

toLeafJoinForm

public static RelNode toLeafJoinForm(RelNode rel)

Converts a relational expression to a form where LogicalJoins are as close to leaves as possible.