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Viewing changes to codeigniter/system/database/drivers/sqlite/sqlite_forge.php

  • Committer: galaxyAbstractor
  • Date: 2013-04-10 15:49:32 UTC
  • mto: (19.1.5 lenasys)
  • mto: This revision was merged to the branch mainline in revision 23.
  • Revision ID: galaxyabstractor@gmail.com-20130410154932-4vizlzk0ar5gykvi
* Added an simple admin panel to the codeviewer-cmssy stuff
* Redesigned a bit like the mockups - still stuff to come
* Implemented the codeviewer + admin panel again using the Framework CodeIgniter instead 

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codeigniter/system/database/drivers/sqlite/sqlite_forge.php
 
1
<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');
 
2
/**
 
3
 * CodeIgniter
 
4
 *
 
5
 * An open source application development framework for PHP 5.1.6 or newer
 
6
 *
 
7
 * @package             CodeIgniter
 
8
 * @author              ExpressionEngine Dev Team
 
9
 * @copyright   Copyright (c) 2008 - 2011, EllisLab, Inc.
 
10
 * @license             http://codeigniter.com/user_guide/license.html
 
11
 * @link                http://codeigniter.com
 
12
 * @since               Version 1.0
 
13
 * @filesource
 
14
 */
 
15
 
 
16
// ------------------------------------------------------------------------
 
17
 
 
18
/**
 
19
 * SQLite Forge Class
 
20
 *
 
21
 * @category    Database
 
22
 * @author              ExpressionEngine Dev Team
 
23
 * @link                http://codeigniter.com/user_guide/database/
 
24
 */
 
25
class CI_DB_sqlite_forge extends CI_DB_forge {
 
26
 
 
27
        /**
 
28
         * Create database
 
29
         *
 
30
         * @access      public
 
31
         * @param       string  the database name
 
32
         * @return      bool
 
33
         */
 
34
        function _create_database()
 
35
        {
 
36
                // In SQLite, a database is created when you connect to the database.
 
37
                // We'll return TRUE so that an error isn't generated
 
38
                return TRUE;
 
39
        }
 
40
 
 
41
        // --------------------------------------------------------------------
 
42
 
 
43
        /**
 
44
         * Drop database
 
45
         *
 
46
         * @access      private
 
47
         * @param       string  the database name
 
48
         * @return      bool
 
49
         */
 
50
        function _drop_database($name)
 
51
        {
 
52
                if ( ! @file_exists($this->db->database) OR ! @unlink($this->db->database))
 
53
                {
 
54
                        if ($this->db->db_debug)
 
55
                        {
 
56
                                return $this->db->display_error('db_unable_to_drop');
 
57
                        }
 
58
                        return FALSE;
 
59
                }
 
60
                return TRUE;
 
61
        }
 
62
        // --------------------------------------------------------------------
 
63
 
 
64
        /**
 
65
         * Create Table
 
66
         *
 
67
         * @access      private
 
68
         * @param       string  the table name
 
69
         * @param       array   the fields
 
70
         * @param       mixed   primary key(s)
 
71
         * @param       mixed   key(s)
 
72
         * @param       boolean should 'IF NOT EXISTS' be added to the SQL
 
73
         * @return      bool
 
74
         */
 
75
        function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists)
 
76
        {
 
77
                $sql = 'CREATE TABLE ';
 
78
 
 
79
                // IF NOT EXISTS added to SQLite in 3.3.0
 
80
                if ($if_not_exists === TRUE && version_compare($this->db->_version(), '3.3.0', '>=') === TRUE)
 
81
                {
 
82
                        $sql .= 'IF NOT EXISTS ';
 
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                }
 
84
 
 
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                $sql .= $this->db->_escape_identifiers($table)."(";
 
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                $current_field_count = 0;
 
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                foreach ($fields as $field=>$attributes)
 
89
                {
 
90
                        // Numeric field names aren't allowed in databases, so if the key is
 
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                        // numeric, we know it was assigned by PHP and the developer manually
 
92
                        // entered the field information, so we'll simply add it to the list
 
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                        if (is_numeric($field))
 
94
                        {
 
95
                                $sql .= "\n\t$attributes";
 
96
                        }
 
97
                        else
 
98
                        {
 
99
                                $attributes = array_change_key_case($attributes, CASE_UPPER);
 
100
 
 
101
                                $sql .= "\n\t".$this->db->_protect_identifiers($field);
 
102
 
 
103
                                $sql .=  ' '.$attributes['TYPE'];
 
104
 
 
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                                if (array_key_exists('CONSTRAINT', $attributes))
 
106
                                {
 
107
                                        $sql .= '('.$attributes['CONSTRAINT'].')';
 
108
                                }
 
109
 
 
110
                                if (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE)
 
111
                                {
 
112
                                        $sql .= ' UNSIGNED';
 
113
                                }
 
114
 
 
115
                                if (array_key_exists('DEFAULT', $attributes))
 
116
                                {
 
117
                                        $sql .= ' DEFAULT \''.$attributes['DEFAULT'].'\'';
 
118
                                }
 
119
 
 
120
                                if (array_key_exists('NULL', $attributes) && $attributes['NULL'] === TRUE)
 
121
                                {
 
122
                                        $sql .= ' NULL';
 
123
                                }
 
124
                                else
 
125
                                {
 
126
                                        $sql .= ' NOT NULL';
 
127
                                }
 
128
 
 
129
                                if (array_key_exists('AUTO_INCREMENT', $attributes) && $attributes['AUTO_INCREMENT'] === TRUE)
 
130
                                {
 
131
                                        $sql .= ' AUTO_INCREMENT';
 
132
                                }
 
133
                        }
 
134
 
 
135
                        // don't add a comma on the end of the last field
 
136
                        if (++$current_field_count < count($fields))
 
137
                        {
 
138
                                $sql .= ',';
 
139
                        }
 
140
                }
 
141
 
 
142
                if (count($primary_keys) > 0)
 
143
                {
 
144
                        $primary_keys = $this->db->_protect_identifiers($primary_keys);
 
145
                        $sql .= ",\n\tPRIMARY KEY (" . implode(', ', $primary_keys) . ")";
 
146
                }
 
147
 
 
148
                if (is_array($keys) && count($keys) > 0)
 
149
                {
 
150
                        foreach ($keys as $key)
 
151
                        {
 
152
                                if (is_array($key))
 
153
                                {
 
154
                                        $key = $this->db->_protect_identifiers($key);
 
155
                                }
 
156
                                else
 
157
                                {
 
158
                                        $key = array($this->db->_protect_identifiers($key));
 
159
                                }
 
160
 
 
161
                                $sql .= ",\n\tUNIQUE (" . implode(', ', $key) . ")";
 
162
                        }
 
163
                }
 
164
 
 
165
                $sql .= "\n)";
 
166
 
 
167
                return $sql;
 
168
        }
 
169
 
 
170
        // --------------------------------------------------------------------
 
171
 
 
172
        /**
 
173
         * Drop Table
 
174
         *
 
175
         *  Unsupported feature in SQLite
 
176
         *
 
177
         * @access      private
 
178
         * @return      bool
 
179
         */
 
180
        function _drop_table($table)
 
181
        {
 
182
                if ($this->db->db_debug)
 
183
                {
 
184
                        return $this->db->display_error('db_unsuported_feature');
 
185
                }
 
186
                return array();
 
187
        }
 
188
 
 
189
        // --------------------------------------------------------------------
 
190
 
 
191
        /**
 
192
         * Alter table query
 
193
         *
 
194
         * Generates a platform-specific query so that a table can be altered
 
195
         * Called by add_column(), drop_column(), and column_alter(),
 
196
         *
 
197
         * @access      private
 
198
         * @param       string  the ALTER type (ADD, DROP, CHANGE)
 
199
         * @param       string  the column name
 
200
         * @param       string  the table name
 
201
         * @param       string  the column definition
 
202
         * @param       string  the default value
 
203
         * @param       boolean should 'NOT NULL' be added
 
204
         * @param       string  the field after which we should add the new field
 
205
         * @return      object
 
206
         */
 
207
        function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '')
 
208
        {
 
209
                $sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table)." $alter_type ".$this->db->_protect_identifiers($column_name);
 
210
 
 
211
                // DROP has everything it needs now.
 
212
                if ($alter_type == 'DROP')
 
213
                {
 
214
                        // SQLite does not support dropping columns
 
215
                        // http://www.sqlite.org/omitted.html
 
216
                        // http://www.sqlite.org/faq.html#q11
 
217
                        return FALSE;
 
218
                }
 
219
 
 
220
                $sql .= " $column_definition";
 
221
 
 
222
                if ($default_value != '')
 
223
                {
 
224
                        $sql .= " DEFAULT \"$default_value\"";
 
225
                }
 
226
 
 
227
                if ($null === NULL)
 
228
                {
 
229
                        $sql .= ' NULL';
 
230
                }
 
231
                else
 
232
                {
 
233
                        $sql .= ' NOT NULL';
 
234
                }
 
235
 
 
236
                if ($after_field != '')
 
237
                {
 
238
                        $sql .= ' AFTER ' . $this->db->_protect_identifiers($after_field);
 
239
                }
 
240
 
 
241
                return $sql;
 
242
 
 
243
        }
 
244
 
 
245
        // --------------------------------------------------------------------
 
246
 
 
247
        /**
 
248
         * Rename a table
 
249
         *
 
250
         * Generates a platform-specific query so that a table can be renamed
 
251
         *
 
252
         * @access      private
 
253
         * @param       string  the old table name
 
254
         * @param       string  the new table name
 
255
         * @return      string
 
256
         */
 
257
        function _rename_table($table_name, $new_table_name)
 
258
        {
 
259
                $sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table_name)." RENAME TO ".$this->db->_protect_identifiers($new_table_name);
 
260
                return $sql;
 
261
        }
 
262
}
 
263
 
 
264
/* End of file sqlite_forge.php */
 
265
/* Location: ./system/database/drivers/sqlite/sqlite_forge.php */
 
 
b'\\ No newline at end of file'