01: /*
02:
03: Derby - Class org.apache.derby.impl.sql.execute.MiscResultSet
04:
05: Licensed to the Apache Software Foundation (ASF) under one or more
06: contributor license agreements. See the NOTICE file distributed with
07: this work for additional information regarding copyright ownership.
08: The ASF licenses this file to you under the Apache License, Version 2.0
09: (the "License"); you may not use this file except in compliance with
10: the License. You may obtain a copy of the License at
11:
12: http://www.apache.org/licenses/LICENSE-2.0
13:
14: Unless required by applicable law or agreed to in writing, software
15: distributed under the License is distributed on an "AS IS" BASIS,
16: WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17: See the License for the specific language governing permissions and
18: limitations under the License.
19:
20: */
21:
22: package org.apache.derby.impl.sql.execute;
23:
24: import org.apache.derby.iapi.error.StandardException;
25: import org.apache.derby.iapi.sql.execute.ConstantAction;
26: import org.apache.derby.iapi.sql.Activation;
27:
28: /**
29: * This is a wrapper class which invokes the Execution-time logic for
30: * Misc statements. The real Execution-time logic lives inside the
31: * executeConstantAction() method of the Execution constant.
32: *
33: * @author jamie
34: */
35:
36: class MiscResultSet extends NoRowsResultSetImpl {
37: private final ConstantAction constantAction;
38:
39: /**
40: * Construct a MiscResultSet
41: *
42: * @param activation Describes run-time environment.
43: *
44: * @exception StandardException Standard Cloudscape error policy.
45: */
46: MiscResultSet(Activation activation) throws StandardException {
47: super (activation);
48: constantAction = activation.getConstantAction();
49: }
50:
51: public void open() throws StandardException {
52: constantAction.executeConstantAction(activation);
53: super .close();
54: }
55:
56: /**
57: * @see org.apache.derby.iapi.sql.ResultSet#cleanUp
58: */
59: public void cleanUp() {
60: }
61: }
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