org.eigenbase.sql.validate
Class IdentifierNamespace

java.lang.Object
  org.eigenbase.sql.validate.AbstractNamespace
      org.eigenbase.sql.validate.IdentifierNamespace

All Implemented Interfaces:

SqlValidatorNamespace

Direct Known Subclasses:

SqlValidatorImpl.DmlNamespace

public class IdentifierNamespace
extends AbstractNamespace

Namespace whose contents are defined by the type of an identifier.

Since:

Mar 25, 2003

Version:

$Id: //open/dev/farrago/src/org/eigenbase/sql/validate/IdentifierNamespace.java#17 $

Author:

jhyde

Field Summary

private SqlIdentifier	id
private List<Pair<SqlNode,SqlMonotonicity>>	monotonicExprs List of monotonic expressions.
private SqlValidatorTable	table The underlying table.

Fields inherited from class org.eigenbase.sql.validate.AbstractNamespace

enclosingNode, rowType, validator

Constructor Summary

IdentifierNamespace(SqlValidatorImpl validator, SqlIdentifier id, SqlNode enclosingNode)
Creates an IdentifierNamespace.

Method Summary

SqlIdentifier	getId()
List<Pair<SqlNode,SqlMonotonicity>>	getMonotonicExprs() Returns a list of expressions which are monotonic in this namespace.
SqlMonotonicity	getMonotonicity(String columnName) Returns whether and how a given column is sorted.
SqlNode	getNode() Returns the parse tree node at the root of this namespace.
SqlValidatorTable	getTable() Returns the underlying table, or null if there is none.
SqlValidatorNamespace	resolve(String name, SqlValidatorScope[] ancestorOut, int[] offsetOut)
RelDataType	validateImpl() Validates this scope and returns the type of the records it returns.

Methods inherited from class org.eigenbase.sql.validate.AbstractNamespace

fieldExists, getEnclosingNode, getRowType, getRowTypeSansSystemColumns, getValidator, isWrapperFor, lookupChild, makeNullable, setRowType, translate, unwrap, validate

Methods inherited from class java.lang.Object

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

Field Detail

id

private final SqlIdentifier id

table

private SqlValidatorTable table

The underlying table. Set on validate.

monotonicExprs

private List<Pair<SqlNode,SqlMonotonicity>> monotonicExprs

List of monotonic expressions. Set on validate.

Constructor Detail

IdentifierNamespace

IdentifierNamespace(SqlValidatorImpl validator,
                    SqlIdentifier id,
                    SqlNode enclosingNode)

Creates an IdentifierNamespace.

Parameters:

validator - Validator

id - Identifier node

enclosingNode - Enclosing node

Method Detail

validateImpl

public RelDataType validateImpl()

Description copied from class: AbstractNamespace

Validates this scope and returns the type of the records it returns. External users should call AbstractNamespace.validate(), which uses the AbstractNamespace.status field to protect against cycles.

Specified by:

validateImpl in class AbstractNamespace

Returns:

record data type, never null

getId

public SqlIdentifier getId()

getNode

public SqlNode getNode()

Description copied from interface: SqlValidatorNamespace

Returns the parse tree node at the root of this namespace.

Returns:

parse tree node

getTable

public SqlValidatorTable getTable()

Description copied from interface: SqlValidatorNamespace

Returns the underlying table, or null if there is none.

Specified by:

getTable in interface SqlValidatorNamespace

Overrides:

getTable in class AbstractNamespace

resolve

public SqlValidatorNamespace resolve(String name,
                                     SqlValidatorScope[] ancestorOut,
                                     int[] offsetOut)

getMonotonicExprs

public List<Pair<SqlNode,SqlMonotonicity>> getMonotonicExprs()

Description copied from interface: SqlValidatorNamespace

Returns a list of expressions which are monotonic in this namespace. For example, if the namespace represents a relation ordered by a column called "TIMESTAMP", then the list would contain a SqlIdentifier called "TIMESTAMP".

Specified by:

getMonotonicExprs in interface SqlValidatorNamespace

Overrides:

getMonotonicExprs in class AbstractNamespace

getMonotonicity

public SqlMonotonicity getMonotonicity(String columnName)

Description copied from interface: SqlValidatorNamespace

Returns whether and how a given column is sorted.

Specified by:

getMonotonicity in interface SqlValidatorNamespace

Overrides:

getMonotonicity in class AbstractNamespace