org.eigenbase.sql.validate
Class UnnestNamespace

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

All Implemented Interfaces:

SqlValidatorNamespace

 class UnnestNamespace
extends AbstractNamespace

Namespace for UNNEST.

Since:

Mar 25, 2003

Version:

$Id: //open/dev/farrago/src/org/eigenbase/sql/validate/UnnestNamespace.java#11 $

Author:

wael

Field Summary

private SqlValidatorScope	scope
private SqlCall	unnest

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

enclosingNode, rowType, validator

Constructor Summary

UnnestNamespace(SqlValidatorImpl validator, SqlCall unnest, SqlValidatorScope scope, SqlNode enclosingNode)

Method Summary

SqlNode	getNode() Returns the parse tree node at the root of this namespace.
private RelDataType	inferReturnType() Returns the type of the argument to UNNEST.
protected 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, getRowType, 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

unnest

private final SqlCall unnest

scope

private final SqlValidatorScope scope

Constructor Detail

UnnestNamespace

UnnestNamespace(SqlValidatorImpl validator,
                SqlCall unnest,
                SqlValidatorScope scope,
                SqlNode enclosingNode)

Method Detail

validateImpl

protected 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

inferReturnType

private RelDataType inferReturnType()

Returns the type of the argument to UNNEST.

getNode

public SqlNode getNode()

Description copied from interface: SqlValidatorNamespace

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

Returns:

parse tree node