RelMdParallelism (Apache Calcite API)

java.lang.Object
- org.apache.calcite.rel.metadata.RelMdParallelism

All Implemented Interfaces:

MetadataHandler<BuiltInMetadata.Parallelism>
```
public class RelMdParallelism
extends java.lang.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 RelMetadataProvider SOURCE
Source for BuiltInMetadata.Parallelism.

Constructor Summary

Constructors
Modifier Constructor Description

protected RelMdParallelism()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`MetadataDef<BuiltInMetadata.Parallelism>`	`getDef()`
`java.lang.Boolean`	`isPhaseTransition(Exchange rel, RelMetadataQuery mq)`
`java.lang.Boolean`	`isPhaseTransition(TableScan rel, RelMetadataQuery mq)`
`java.lang.Boolean`	`isPhaseTransition(Values rel, RelMetadataQuery mq)`
`java.lang.Boolean`	`isPhaseTransition(RelNode rel, RelMetadataQuery mq)`	Catch-all implementation for `BuiltInMetadata.Parallelism.isPhaseTransition()`, invoked using reflection.
`java.lang.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 Detail
- SOURCE
```
public static final RelMetadataProvider SOURCE
```
  Source for BuiltInMetadata.Parallelism.

Constructor Detail
- RelMdParallelism
```
protected RelMdParallelism()
```

Method Detail

getDef
```
public MetadataDef<BuiltInMetadata.Parallelism> getDef()
```
Specified by:

getDef in interface MetadataHandler<BuiltInMetadata.Parallelism>

isPhaseTransition
```
public java.lang.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 java.lang.Boolean isPhaseTransition(TableScan rel,
                                           RelMetadataQuery mq)

isPhaseTransition

public java.lang.Boolean isPhaseTransition(Values rel,
                                           RelMetadataQuery mq)

isPhaseTransition

public java.lang.Boolean isPhaseTransition(Exchange rel,
                                           RelMetadataQuery mq)

splitCount
```
public java.lang.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)