| /* |
| |
| Derby - Class org.apache.derby.impl.sql.compile.HasTableFunctionVisitor |
| |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to you under the Apache License, Version 2.0 |
| (the "License"); you may not use this file except in compliance with |
| the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| |
| */ |
| |
| package org.apache.derby.impl.sql.compile; |
| |
| import org.apache.derby.iapi.sql.compile.Visitable; |
| |
| /** |
| * Find out if we have a user-defined table function anywhere in the |
| * tree. Stop traversal as soon as we find one. |
| */ |
| class HasTableFunctionVisitor extends HasNodeVisitor |
| { |
| /////////////////////////////////////////////////////////////////////////////////// |
| // |
| // CONSTRUCTORS |
| // |
| /////////////////////////////////////////////////////////////////////////////////// |
| |
| public HasTableFunctionVisitor() |
| { |
| super( FromVTI.class ); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////// |
| // |
| // OVERRIDES |
| // |
| /////////////////////////////////////////////////////////////////////////////////// |
| |
| @Override |
| public Visitable visit(Visitable node) |
| { |
| if ( node instanceof FromVTI ) |
| { |
| FromVTI vti = (FromVTI) node; |
| |
| if ( vti.isDerbyStyleTableFunction() ) { hasNode = true; } |
| } |
| return node; |
| } |
| } |
| |