01: /*
02:
03: Derby - Class org.apache.derby.iapi.store.access.ColumnOrdering
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.iapi.store.access;
23:
24: import org.apache.derby.iapi.error.StandardException;
25:
26: /**
27:
28: The column ordering interface defines a column that is to be
29: ordered in a sort or index, and how it is to be ordered. Column
30: instances are compared by calling the compare(Orderable) method
31: of Orderable.
32:
33: **/
34:
35: public interface ColumnOrdering {
36: int getColumnId();
37:
38: boolean getIsAscending();
39: }
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