org.apache.calcite.prepare

Class RelOptTableImpl

java.lang.Object

org.apache.calcite.prepare.RelOptTableImpl

All Implemented Interfaces:

RelOptTable, Prepare.PreparingTable, SqlValidatorTable

public class RelOptTableImpl
extends Object
implements Prepare.PreparingTable

Implementation of RelOptTable.

Nested Class Summary

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

RelOptTable.ToRelContext, RelOptTable.ViewExpander

Method Summary

Methods

Modifier and Type	Method and Description
static RelOptTableImpl	create(RelOptSchema schema, RelDataType rowType, CalciteSchema.TableEntry tableEntry, Double rowCount)
static RelOptTableImpl	create(RelOptSchema schema, RelDataType rowType, List<String> names, Expression expression)
static RelOptTableImpl	create(RelOptSchema schema, RelDataType rowType, Table table)
RelOptTable	extend(List<RelDataTypeField> extendedFields) Returns a table with the given extra fields.
SqlAccessType	getAllowedAccess() Returns the access type of the table
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.
SqlMonotonicity	getMonotonicity(String columnName) Returns whether a given column is monotonic.
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.
boolean	supportsModality(SqlModality modality)
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

Method Detail

create

public static RelOptTableImpl create(RelOptSchema schema,
                     RelDataType rowType,
                     List<String> names,
                     Expression expression)

create

public static RelOptTableImpl create(RelOptSchema schema,
                     RelDataType rowType,
                     CalciteSchema.TableEntry tableEntry,
                     Double rowCount)

create

public static RelOptTableImpl create(RelOptSchema schema,
                     RelDataType rowType,
                     Table table)

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

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

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

getRelOptSchema

public RelOptSchema getRelOptSchema()

Description copied from interface: RelOptTable

Returns the RelOptSchema this table belongs to.

Specified by:

getRelOptSchema in interface RelOptTable

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

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)

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

getRowType

public RelDataType getRowType()

Description copied from interface: RelOptTable

Describes the type of rows returned by this table.

Specified by:

getRowType in interface RelOptTable

Specified by:

getRowType in interface SqlValidatorTable

supportsModality

public boolean supportsModality(SqlModality modality)

Specified by:

supportsModality in interface SqlValidatorTable

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

Specified by:

getQualifiedName in interface SqlValidatorTable

Returns:

qualified name

getMonotonicity

public SqlMonotonicity getMonotonicity(String columnName)

Description copied from interface: SqlValidatorTable

Returns whether a given column is monotonic.

Specified by:

getMonotonicity in interface SqlValidatorTable

getAllowedAccess

public SqlAccessType getAllowedAccess()

Description copied from interface: SqlValidatorTable

Returns the access type of the table

Specified by:

getAllowedAccess in interface SqlValidatorTable