org.apache.calcite.schema.impl

Class AbstractTable

java.lang.Object

org.apache.calcite.schema.impl.AbstractTable

All Implemented Interfaces:

Table, Wrapper

Direct Known Subclasses:

AbstractQueryableTable, StarTable

public abstract class AbstractTable
extends Object
implements Table, Wrapper

Abstract base class for implementing Table.

Sub-classes should override isRolledUp(java.lang.String) and Table.rolledUpColumnValidInsideAgg(String, SqlCall, SqlNode, CalciteConnectionConfig) if their table can potentially contain rolled up values. This information is used by the validator to check for illegal uses of these columns.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractTable()

Method Summary

Modifier and Type	Method and Description
Schema.TableType	getJdbcTableType() Type of table.
Statistic	getStatistic() Returns a provider of statistics about this table.
boolean	isRolledUp(String column) Determines whether the given column has been rolled up.
boolean	rolledUpColumnValidInsideAgg(String column, SqlCall call, @Nullable SqlNode parent, @Nullable CalciteConnectionConfig config) Determines whether the given rolled up column can be used inside the given aggregate function.
<C> C	unwrap(Class<C> aClass) Finds an instance of an interface implemented by this object, or returns null if this object does not support that interface.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.calcite.schema.Table

getRowType

Methods inherited from interface org.apache.calcite.schema.Wrapper

maybeUnwrap, unwrapOrThrow

Constructor Detail

AbstractTable

protected AbstractTable()

Method Detail

getStatistic

public Statistic getStatistic()

Description copied from interface: Table

Returns a provider of statistics about this table.

Specified by:

getStatistic in interface Table

getJdbcTableType

public Schema.TableType getJdbcTableType()

Description copied from interface: Table

Type of table.

Specified by:

getJdbcTableType in interface Table

unwrap

public <C> C unwrap(Class<C> aClass)

Description copied from interface: Wrapper

Finds an instance of an interface implemented by this object, or returns null if this object does not support that interface.

Specified by:

unwrap in interface Wrapper

isRolledUp

public boolean isRolledUp(String column)

Description copied from interface: Table

Determines whether the given column has been rolled up.

Specified by:

isRolledUp in interface Table

rolledUpColumnValidInsideAgg

public boolean rolledUpColumnValidInsideAgg(String column,
                                            SqlCall call,
                                            @Nullable SqlNode parent,
                                            @Nullable CalciteConnectionConfig config)

Description copied from interface: Table

Determines whether the given rolled up column can be used inside the given aggregate function. You can assume that isRolledUp(column) is true.

Specified by:

rolledUpColumnValidInsideAgg in interface Table

Parameters:

column - The column name for which isRolledUp is true

call - The aggregate call

parent - Parent node of call in the SqlNode tree

config - Config settings. May be null

Returns:

true iff the given aggregate call is valid