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 RelMetadataProvider	SOURCE

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	RelMdTableReferences()

Method Summary

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

getTableReferences

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

getTableReferences

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

getTableReferences

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

TableScan table reference.

getTableReferences

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

Table references from Aggregate.

getTableReferences

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

Table references from Join.

getTableReferences

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

Table references from Project.

getTableReferences

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

Table references from Filter.

getTableReferences

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

Table references from Calc.

getTableReferences

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

Table references from Sort.

getTableReferences

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

Table references from TableModify.

getTableReferences

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

Table references from Exchange.

getTableReferences

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

Table references from Window.

getTableReferences

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

Table references from Sample.