Package 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.

Field Summary

Fields

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

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
static RelNode	toLeafJoinForm(RelNode rel)	Converts a relational expression to a form where LogicalJoins are as close to leaves as possible.
static @Nullable 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 Details

tableRel

public final RelNode tableRel

starRelOptTable

public final @Nullable RelOptTable starRelOptTable

starTable

public final @Nullable StarTable starTable

qualifiedTableName

public final List<String> qualifiedTableName

queryRel

public final RelNode queryRel

Constructor Details

RelOptMaterialization

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

Creates a RelOptMaterialization.

Method Details

tryUseStar

public static @Nullable 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.