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Java > Open Source Codes > com > quadcap > sql > StmtCreateTable


1 package com.quadcap.sql;
2
3 /* Copyright 1999 - 2003 Quadcap Software. All rights reserved.
4  *
5  * This software is distributed under the Quadcap Free Software License.
6  * This software may be used or modified for any purpose, personal or
7  * commercial. Open Source redistributions are permitted. Commercial
8  * redistribution of larger works derived from, or works which bundle
9  * this software requires a "Commercial Redistribution License"; see
10  * http://www.quadcap.com/purchase.
11  *
12  * Redistributions qualify as "Open Source" under one of the following terms:
13  *
14  * Redistributions are made at no charge beyond the reasonable cost of
15  * materials and delivery.
16  *
17  * Redistributions are accompanied by a copy of the Source Code or by an
18  * irrevocable offer to provide a copy of the Source Code for up to three
19  * years at the cost of materials and delivery. Such redistributions
20  * must allow further use, modification, and redistribution of the Source
21  * Code under substantially the same terms as this license.
22  *
23  * Redistributions of source code must retain the copyright notices as they
24  * appear in each source code file, these license terms, and the
25  * disclaimer/limitation of liability set forth as paragraph 6 below.
26  *
27  * Redistributions in binary form must reproduce this Copyright Notice,
28  * these license terms, and the disclaimer/limitation of liability set
29  * forth as paragraph 6 below, in the documentation and/or other materials
30  * provided with the distribution.
31  *
32  * The Software is provided on an "AS IS" basis. No warranty is
33  * provided that the Software is free of defects, or fit for a
34  * particular purpose.
35  *
36  * Limitation of Liability. Quadcap Software shall not be liable
37  * for any damages suffered by the Licensee or any third party resulting
38  * from use of the Software.
39  */
40
41 import java.io.IOException JavaDoc;
42
43 import java.util.Vector JavaDoc;
44
45 import java.sql.SQLException JavaDoc;
46
47 import com.quadcap.util.Debug;
48
49 /**
50  * Implementation of the SQL <B>CREATE TABLE</B> statement.
51  *
52  * @author Stan Bailes
53  */
54
55  
56 public class StmtCreateTable implements Stmt {
57     Table table;
58     Vector JavaDoc constraints;
59     boolean index = false;
60
61     /**
62      * Default constructor
63      */
64     public StmtCreateTable() {}
65
66     /**
67      * Constructor from table and constraints
68      */
69     public StmtCreateTable(Table table, Vector JavaDoc constraints) {
70     this.table = table;
71     this.constraints = constraints;
72     }
73
74     /**
75      * Helper to perform the operations necessary to add the specified
76      * constraints
77      */
78     void addConstraints(Session session, Vector JavaDoc constraints)
79     throws IOException JavaDoc, SQLException JavaDoc
80     {
81     Database db = session.getDatabase();
82     for (int j = 0; j < constraints.size(); j++) {
83         Constraint con = (Constraint)constraints.elementAt(j);
84         if (con instanceof UniqueConstraint) {
85         index = true;
86         }
87         session.doStep(new AddConstraint(session, table, con));
88         }
89     }
90
91     /**
92      * Add the table and the constraints
93      */
94     public void execute(Session session) throws IOException JavaDoc, SQLException JavaDoc {
95         session.getTableWriteLock("#Schema");
96         table.setUnderConstruction(true);
97         try {
98             session.doStep(new AddTable(session, table));
99             for (int i = 1; i <= table.getColumnCount(); i++) {
100                 Vector JavaDoc v = table.getColumn(i).getConstraints();
101                 if (v != null) {
102                     addConstraints(session, v);
103                 }
104             }
105             addConstraints(session, constraints);
106             if (!index) {
107                 Vector JavaDoc v = new Vector JavaDoc();
108                 v.addElement(new DefaultTableConstraint());
109                 addConstraints(session, v);
110             }
111         } finally {
112             table.setUnderConstruction(false);
113         }
114     }
115 }
116
117
118
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