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Java > Open Source Codes > com > daffodilwoods > daffodildb > server > sql99 > dql > plan > set > SetOperatorConstants


1 package com.daffodilwoods.daffodildb.server.sql99.dql.plan.set;
2
3 import com.daffodilwoods.daffodildb.server.sql99.dql.queryexpression.*;
4
5 /**
6  * It represents the constants for set operators.
7  * <p>Title: </p>
8  * <p>Description: </p>
9  * <p>Copyright: Copyright (c) 2003</p>
10  * <p>Company: </p>
11  * @author unascribed
12  * @version 1.0
13  */
14
15 public interface SetOperatorConstants {
16
17    /**
18     * Represents the Union set operator
19     */
20
21    public static final int UNION = 0;
22
23    /**
24     * Represents the Intersect set operator
25     */
26
27    public static final int INTERSECT = 1;
28
29    /**
30     * Represents the Except set operator
31     */
32
33    public static final int EXCEPT = 2;
34
35    /**
36     * Represents the DISTINCT option of set operators
37     */
38
39    public static final int DISTINCT = 3;
40
41    /**
42     * Represents the ALL option of set operators
43     */
44
45    public static final int ALL =4;
46 }
47
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