Package org.apache.calcite.rel.metadata

Class RelMdExplainVisibility

java.lang.Object

org.apache.calcite.rel.metadata.RelMdExplainVisibility

All Implemented Interfaces:

MetadataHandler<BuiltInMetadata.ExplainVisibility>

public class RelMdExplainVisibility
extends Object
implements MetadataHandler<BuiltInMetadata.ExplainVisibility>

RelMdExplainVisibility supplies a default implementation of RelMetadataQuery.isVisibleInExplain(org.apache.calcite.rel.RelNode, org.apache.calcite.sql.SqlExplainLevel) for the standard logical algebra.

Field Summary

Fields

Modifier and Type	Field	Description
static final RelMetadataProvider	SOURCE

Method Summary

Modifier and Type	Method	Description
MetadataDef<BuiltInMetadata.ExplainVisibility>	getDef()
@Nullable Boolean	isVisibleInExplain(TableScan scan, RelMetadataQuery mq, SqlExplainLevel explainLevel)
@Nullable Boolean	isVisibleInExplain(RelNode rel, RelMetadataQuery mq, SqlExplainLevel explainLevel)	Catch-all implementation for BuiltInMetadata.ExplainVisibility.isVisibleInExplain(SqlExplainLevel), 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

Method Details

getDef

public MetadataDef<BuiltInMetadata.ExplainVisibility> getDef()

Specified by:

getDef in interface MetadataHandler<BuiltInMetadata.ExplainVisibility>

isVisibleInExplain

public @Nullable Boolean isVisibleInExplain(RelNode rel,
 RelMetadataQuery mq,
 SqlExplainLevel explainLevel)

Catch-all implementation for BuiltInMetadata.ExplainVisibility.isVisibleInExplain(SqlExplainLevel), invoked using reflection.

See Also:

• RelMetadataQuery.isVisibleInExplain(RelNode, SqlExplainLevel)

isVisibleInExplain

public @Nullable Boolean isVisibleInExplain(TableScan scan,
 RelMetadataQuery mq,
 SqlExplainLevel explainLevel)