Package org.apache.calcite.rel.metadata

Class RelMdTableReferences

java.lang.Object

org.apache.calcite.rel.metadata.RelMdTableReferences

All Implemented Interfaces:

MetadataHandler<BuiltInMetadata.TableReferences>

public class RelMdTableReferences
extends Object
implements MetadataHandler<BuiltInMetadata.TableReferences>

Default implementation of RelMetadataQuery.getTableReferences(org.apache.calcite.rel.RelNode) for the standard logical algebra.

The goal of this provider is to return all tables used by a given expression identified uniquely by a RexTableInputRef.RelTableRef.

Each unique identifier RexTableInputRef.RelTableRef of a table will equal to the identifier obtained running RelMdExpressionLineage over the same plan node for an expression that refers to the same table.

If tables cannot be obtained, we return null.

Field Summary

Fields

Modifier and Type	Field	Description
static final RelMetadataProvider	SOURCE

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	RelMdTableReferences()

Method Summary

Modifier and Type	Method	Description
MetadataDef<BuiltInMetadata.TableReferences>	getDef()
@Nullable Set<RexTableInputRef.RelTableRef>	getTableReferences(RelSubset rel, RelMetadataQuery mq)
@Nullable Set<RexTableInputRef.RelTableRef>	getTableReferences(Aggregate rel, RelMetadataQuery mq)	Table references from Aggregate.
@Nullable Set<RexTableInputRef.RelTableRef>	getTableReferences(Calc rel, RelMetadataQuery mq)	Table references from Calc.
@Nullable Set<RexTableInputRef.RelTableRef>	getTableReferences(Exchange rel, RelMetadataQuery mq)	Table references from Exchange.
@Nullable Set<RexTableInputRef.RelTableRef>	getTableReferences(Filter rel, RelMetadataQuery mq)	Table references from Filter.
@Nullable Set<RexTableInputRef.RelTableRef>	getTableReferences(Join rel, RelMetadataQuery mq)	Table references from Join.
@Nullable Set<RexTableInputRef.RelTableRef>	getTableReferences(Project rel, RelMetadataQuery mq)	Table references from Project.
@Nullable Set<RexTableInputRef.RelTableRef>	getTableReferences(Sample rel, RelMetadataQuery mq)	Table references from Sample.
@Nullable Set<RexTableInputRef.RelTableRef>	getTableReferences(SetOp rel, RelMetadataQuery mq)	Table references from Union, Intersect, Minus.
@Nullable Set<RexTableInputRef.RelTableRef>	getTableReferences(Sort rel, RelMetadataQuery mq)	Table references from Sort.
@Nullable Set<RexTableInputRef.RelTableRef>	getTableReferences(TableModify rel, RelMetadataQuery mq)	Table references from TableModify.
Set<RexTableInputRef.RelTableRef>	getTableReferences(TableScan rel, RelMetadataQuery mq)	TableScan table reference.
@Nullable Set<RexTableInputRef.RelTableRef>	getTableReferences(Window rel, RelMetadataQuery mq)	Table references from Window.
@Nullable Set<RexTableInputRef.RelTableRef>	getTableReferences(RelNode rel, RelMetadataQuery mq)

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

Constructor Details

RelMdTableReferences

protected RelMdTableReferences()

Method Details

getDef

public MetadataDef<BuiltInMetadata.TableReferences> getDef()

Specified by:

getDef in interface MetadataHandler<BuiltInMetadata.TableReferences>

getTableReferences

public @Nullable Set<RexTableInputRef.RelTableRef> getTableReferences(RelNode rel,
 RelMetadataQuery mq)

getTableReferences

public @Nullable Set<RexTableInputRef.RelTableRef> getTableReferences(RelSubset rel,
 RelMetadataQuery mq)

getTableReferences

public Set<RexTableInputRef.RelTableRef> getTableReferences(TableScan rel,
 RelMetadataQuery mq)

TableScan table reference.

getTableReferences

public @Nullable Set<RexTableInputRef.RelTableRef> getTableReferences(Aggregate rel,
 RelMetadataQuery mq)

Table references from Aggregate.

getTableReferences

public @Nullable Set<RexTableInputRef.RelTableRef> getTableReferences(Join rel,
 RelMetadataQuery mq)

Table references from Join.

getTableReferences

public @Nullable Set<RexTableInputRef.RelTableRef> getTableReferences(SetOp rel,
 RelMetadataQuery mq)

Table references from Union, Intersect, Minus.

For Union operator, we might be able to extract multiple table references.

getTableReferences

public @Nullable Set<RexTableInputRef.RelTableRef> getTableReferences(Project rel,
 RelMetadataQuery mq)

Table references from Project.

getTableReferences

public @Nullable Set<RexTableInputRef.RelTableRef> getTableReferences(Filter rel,
 RelMetadataQuery mq)

Table references from Filter.

getTableReferences

public @Nullable Set<RexTableInputRef.RelTableRef> getTableReferences(Calc rel,
 RelMetadataQuery mq)

Table references from Calc.

getTableReferences

public @Nullable Set<RexTableInputRef.RelTableRef> getTableReferences(Sort rel,
 RelMetadataQuery mq)

Table references from Sort.

getTableReferences

public @Nullable Set<RexTableInputRef.RelTableRef> getTableReferences(TableModify rel,
 RelMetadataQuery mq)

Table references from TableModify.

getTableReferences

public @Nullable Set<RexTableInputRef.RelTableRef> getTableReferences(Exchange rel,
 RelMetadataQuery mq)

Table references from Exchange.

getTableReferences

public @Nullable Set<RexTableInputRef.RelTableRef> getTableReferences(Window rel,
 RelMetadataQuery mq)

Table references from Window.

getTableReferences

public @Nullable Set<RexTableInputRef.RelTableRef> getTableReferences(Sample rel,
 RelMetadataQuery mq)

Table references from Sample.