org.eigenbase.sql.validate
Class ParameterNamespace

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

All Implemented Interfaces:

SqlValidatorNamespace

 class ParameterNamespace
extends AbstractNamespace

Namespace representing the type of a dynamic parameter.

Since:

Mar 25, 2003

Version:

$Id: //open/dev/farrago/src/org/eigenbase/sql/validate/ParameterNamespace.java#8 $

Author:

jhyde

See Also:

ParameterScope

Field Summary

private RelDataType

type

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

enclosingNode, rowType, validator

Constructor Summary

ParameterNamespace(SqlValidatorImpl validator, RelDataType type)

Method Summary

SqlNode	getNode() Returns the parse tree node at the root of this namespace.
RelDataType	getRowType() Returns the row type of this namespace, which comprises a list of names and types of the output columns.
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, getMonotonicExprs, getMonotonicity, getRowTypeSansSystemColumns, getTable, 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

type

private final RelDataType type

Constructor Detail

ParameterNamespace

public ParameterNamespace(SqlValidatorImpl validator,
                          RelDataType type)

Method Detail

getNode

public SqlNode getNode()

Description copied from interface: SqlValidatorNamespace

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

Returns:

parse tree node

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

getRowType

public RelDataType getRowType()

Description copied from interface: SqlValidatorNamespace

Returns the row type of this namespace, which comprises a list of names and types of the output columns. If the scope's type has not yet been derived, derives it. Never returns null.

Specified by:

getRowType in interface SqlValidatorNamespace

Overrides:

getRowType in class AbstractNamespace