org.apache.calcite.plan

Class RelOptAbstractTable

java.lang.Object

org.apache.calcite.plan.RelOptAbstractTable

All Implemented Interfaces:

RelOptTable

public abstract class RelOptAbstractTable
extends Object
implements RelOptTable

Partial implementation of RelOptTable.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.calcite.plan.RelOptTable

RelOptTable.ToRelContext, RelOptTable.ViewExpander

Field Summary

Fields

Modifier and Type	Field and Description
protected String	name
protected RelDataType	rowType
protected RelOptSchema	schema

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	RelOptAbstractTable(RelOptSchema schema, String name, RelDataType rowType)

Method Summary

Methods

Modifier and Type	Method and Description
RelOptTable	extend(List<RelDataTypeField> extendedFields) Returns a table with the given extra fields.
List<RelCollation>	getCollationList() Returns a description of the physical ordering (or orderings) of the rows returned from this table.
RelDistribution	getDistribution() Returns a description of the physical distribution of the rows in this table.
Expression	getExpression(Class clazz) Generates code for this table.
String	getName()
List<String>	getQualifiedName() Obtains an identifier for this table.
RelOptSchema	getRelOptSchema() Returns the RelOptSchema this table belongs to.
double	getRowCount() Returns an estimate of the number of rows in the table.
RelDataType	getRowType() Describes the type of rows returned by this table.
boolean	isKey(ImmutableBitSet columns) Returns whether the given columns are a key or a superset of a unique key of this table.
RelNode	toRel(RelOptTable.ToRelContext context) Converts this table into a relational expression.
<T> T	unwrap(Class<T> clazz) Finds an interface implemented by this table.

Methods inherited from class java.lang.Object

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

Field Detail

schema

protected final RelOptSchema schema

rowType

protected final RelDataType rowType

name

protected final String name

Constructor Detail

RelOptAbstractTable

protected RelOptAbstractTable(RelOptSchema schema,
                   String name,
                   RelDataType rowType)

Method Detail

getName

public String getName()

getQualifiedName

public List<String> getQualifiedName()

Description copied from interface: RelOptTable

Obtains an identifier for this table. The identifier must be unique with respect to the Connection producing this table.

Specified by:

getQualifiedName in interface RelOptTable

Returns:

qualified name

getRowCount

public double getRowCount()

Description copied from interface: RelOptTable

Returns an estimate of the number of rows in the table.

Specified by:

getRowCount in interface RelOptTable

getRowType

public RelDataType getRowType()

Description copied from interface: RelOptTable

Describes the type of rows returned by this table.

Specified by:

getRowType in interface RelOptTable

getRelOptSchema

public RelOptSchema getRelOptSchema()

Description copied from interface: RelOptTable

Returns the RelOptSchema this table belongs to.

Specified by:

getRelOptSchema in interface RelOptTable

getCollationList

public List<RelCollation> getCollationList()

Description copied from interface: RelOptTable

Returns a description of the physical ordering (or orderings) of the rows returned from this table.

Specified by:

getCollationList in interface RelOptTable

See Also:

RelMetadataQuery.collations(RelNode)

getDistribution

public RelDistribution getDistribution()

Description copied from interface: RelOptTable

Returns a description of the physical distribution of the rows in this table.

Specified by:

getDistribution in interface RelOptTable

See Also:

RelMetadataQuery.distribution(RelNode)

unwrap

public <T> T unwrap(Class<T> clazz)

Description copied from interface: RelOptTable

Finds an interface implemented by this table.

Specified by:

unwrap in interface RelOptTable

isKey

public boolean isKey(ImmutableBitSet columns)

Description copied from interface: RelOptTable

Returns whether the given columns are a key or a superset of a unique key of this table.

Specified by:

isKey in interface RelOptTable

Parameters:

columns - Ordinals of key columns

Returns:

Whether the given columns are a key or a superset of a key

toRel

public RelNode toRel(RelOptTable.ToRelContext context)

Description copied from interface: RelOptTable

Converts this table into a relational expression.

The planner calls this method to convert a table into an initial relational expression, generally something abstract, such as a LogicalTableScan, then optimizes this expression by applying rules to transform it into more efficient access methods for this table.

Specified by:

toRel in interface RelOptTable

getExpression

public Expression getExpression(Class clazz)

Description copied from interface: RelOptTable

Generates code for this table.

Specified by:

getExpression in interface RelOptTable

Parameters:

clazz - The desired collection class; for example Queryable.

extend

public RelOptTable extend(List<RelDataTypeField> extendedFields)

Description copied from interface: RelOptTable

Returns a table with the given extra fields.

Specified by:

extend in interface RelOptTable