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Java > Open Source Codes > org > apache > derby > iapi > store > access > ColumnOrdering


1 /*
2
3    Derby - Class org.apache.derby.iapi.store.access.ColumnOrdering
4
5    Licensed to the Apache Software Foundation (ASF) under one or more
6    contributor license agreements. See the NOTICE file distributed with
7    this work for additional information regarding copyright ownership.
8    The ASF licenses this file to you under the Apache License, Version 2.0
9    (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.iapi.store.access;
23
24 import org.apache.derby.iapi.error.StandardException;
25
26
27 /**
28
29   The column ordering interface defines a column that is to be
30   ordered in a sort or index, and how it is to be ordered. Column
31   instances are compared by calling the compare(Orderable) method
32   of Orderable.
33
34 **/
35
36 public interface ColumnOrdering
37 {
38     int getColumnId();
39     boolean getIsAscending();
40 }
41
42
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