01: /*
02:
03: Derby - Class org.apache.derby.catalog.ReferencedColumns
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.catalog;
23:
24: /**
25: *
26: * Provides information about the columns that are referenced by a
27: * CHECK CONSTRAINT definition.
28: *
29: * It is used in the column SYS.SYSCHECKS.REFERENCEDCOLUMNSDESCRIPTOR.
30: */
31: public interface ReferencedColumns {
32: /**
33: * Returns an array of 1-based column positions in the table that the
34: * check constraint is on.
35: *
36: * @return An array of ints representing the 1-based column positions
37: * of the columns that are referenced in this check constraint.
38: */
39: public int[] getReferencedColumnPositions();
40: }
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