Package org.apache.calcite.rel.metadata

Class RelMdParallelism

java.lang.Object

org.apache.calcite.rel.metadata.RelMdParallelism

All Implemented Interfaces:

MetadataHandler<BuiltInMetadata.Parallelism>

public class RelMdParallelism
extends Object
implements MetadataHandler<BuiltInMetadata.Parallelism>

Default implementations of the BuiltInMetadata.Parallelism metadata provider for the standard logical algebra.

See Also:

• RelMetadataQuery.isPhaseTransition(org.apache.calcite.rel.RelNode)
• RelMetadataQuery.splitCount(org.apache.calcite.rel.RelNode)

Field Summary

Fields

Modifier and Type	Field	Description
static final RelMetadataProvider	SOURCE	Source for BuiltInMetadata.Parallelism.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	RelMdParallelism()

Method Summary

Modifier and Type	Method	Description
MetadataDef<BuiltInMetadata.Parallelism>	getDef()
Boolean	isPhaseTransition(Exchange rel, RelMetadataQuery mq)
Boolean	isPhaseTransition(TableScan rel, RelMetadataQuery mq)
Boolean	isPhaseTransition(Values rel, RelMetadataQuery mq)
Boolean	isPhaseTransition(RelNode rel, RelMetadataQuery mq)	Catch-all implementation for BuiltInMetadata.Parallelism.isPhaseTransition(), invoked using reflection.
Integer	splitCount(RelNode rel, RelMetadataQuery mq)	Catch-all implementation for BuiltInMetadata.Parallelism.splitCount(), invoked using reflection.

Methods inherited from class java.lang.Object

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

Field Details

SOURCE

public static final RelMetadataProvider SOURCE

Source for BuiltInMetadata.Parallelism.

Constructor Details

RelMdParallelism

protected RelMdParallelism()

Method Details

getDef

public MetadataDef<BuiltInMetadata.Parallelism> getDef()

Specified by:

getDef in interface MetadataHandler<BuiltInMetadata.Parallelism>

isPhaseTransition

public Boolean isPhaseTransition(RelNode rel,
 RelMetadataQuery mq)

Catch-all implementation for BuiltInMetadata.Parallelism.isPhaseTransition(), invoked using reflection.

See Also:

• RelMetadataQuery.isPhaseTransition(org.apache.calcite.rel.RelNode)

isPhaseTransition

public Boolean isPhaseTransition(TableScan rel,
 RelMetadataQuery mq)

isPhaseTransition

public Boolean isPhaseTransition(Values rel,
 RelMetadataQuery mq)

isPhaseTransition

public Boolean isPhaseTransition(Exchange rel,
 RelMetadataQuery mq)

splitCount

public Integer splitCount(RelNode rel,
 RelMetadataQuery mq)

Catch-all implementation for BuiltInMetadata.Parallelism.splitCount(), invoked using reflection.

See Also:

• RelMetadataQuery.splitCount(org.apache.calcite.rel.RelNode)