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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 | * @copyright Copyright (c) 2008 - 2011, EllisLab, Inc. | |
9 | * @license http://codeigniter.com/user_guide/license.html | |
10 | * @author EllisLab Dev Team | |
11 | * @link http://codeigniter.com | |
12 | * @since Version 2.1.2 | |
13 | * @filesource | |
14 | */ | |
15 | ||
16 | // ------------------------------------------------------------------------ | |
17 | ||
18 | /** | |
19 | * PDO Forge Class | |
20 | * | |
21 | * @category Database | |
22 | * @author EllisLab Dev Team | |
23 | * @link http://codeigniter.com/database/ | |
24 | */ | |
25 | class CI_DB_pdo_forge extends CI_DB_forge { | |
26 | ||
27 | /** | |
28 | * Create database | |
29 | * | |
30 | * @access private | |
31 | * @param string the database name | |
32 | * @return bool | |
33 | */ | |
34 | function _create_database() | |
35 | { | |
36 | // PDO has no "create database" command since it's | |
37 | // designed to connect to an existing database | |
38 | if ($this->db->db_debug) | |
39 | { | |
40 | return $this->db->display_error('db_unsuported_feature'); | |
41 | } | |
42 | return FALSE; | |
43 | } | |
44 | ||
45 | // -------------------------------------------------------------------- | |
46 | ||
47 | /** | |
48 | * Drop database | |
49 | * | |
50 | * @access private | |
51 | * @param string the database name | |
52 | * @return bool | |
53 | */ | |
54 | function _drop_database($name) | |
55 | { | |
56 | // PDO has no "drop database" command since it's | |
57 | // designed to connect to an existing database | |
58 | if ($this->db->db_debug) | |
59 | { | |
60 | return $this->db->display_error('db_unsuported_feature'); | |
61 | } | |
62 | return FALSE; | |
63 | } | |
64 | ||
65 | // -------------------------------------------------------------------- | |
66 | ||
67 | /** | |
68 | * Create Table | |
69 | * | |
70 | * @access private | |
71 | * @param string the table name | |
72 | * @param array the fields | |
73 | * @param mixed primary key(s) | |
74 | * @param mixed key(s) | |
75 | * @param boolean should 'IF NOT EXISTS' be added to the SQL | |
76 | * @return bool | |
77 | */ | |
78 | function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists) | |
79 | { | |
80 | $sql = 'CREATE TABLE '; | |
81 | ||
82 | if ($if_not_exists === TRUE) | |
83 | { | |
84 | $sql .= 'IF NOT EXISTS '; | |
85 | } | |
86 | ||
87 | $sql .= $this->db->_escape_identifiers($table)." ("; | |
88 | $current_field_count = 0; | |
89 | ||
90 | foreach ($fields as $field=>$attributes) | |
91 | { | |
92 | // Numeric field names aren't allowed in databases, so if the key is | |
93 | // numeric, we know it was assigned by PHP and the developer manually | |
94 | // entered the field information, so we'll simply add it to the list | |
95 | if (is_numeric($field)) | |
96 | { | |
97 | $sql .= "\n\t$attributes"; | |
98 | } | |
99 | else | |
100 | { | |
101 | $attributes = array_change_key_case($attributes, CASE_UPPER); | |
102 | ||
103 | $sql .= "\n\t".$this->db->_protect_identifiers($field); | |
104 | ||
105 | $sql .= ' '.$attributes['TYPE']; | |
106 | ||
107 | if (array_key_exists('CONSTRAINT', $attributes)) | |
108 | { | |
109 | $sql .= '('.$attributes['CONSTRAINT'].')'; | |
110 | } | |
111 | ||
112 | if (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE) | |
113 | { | |
114 | $sql .= ' UNSIGNED'; | |
115 | } | |
116 | ||
117 | if (array_key_exists('DEFAULT', $attributes)) | |
118 | { | |
119 | $sql .= ' DEFAULT \''.$attributes['DEFAULT'].'\''; | |
120 | } | |
121 | ||
122 | if (array_key_exists('NULL', $attributes) && $attributes['NULL'] === TRUE) | |
123 | { | |
124 | $sql .= ' NULL'; | |
125 | } | |
126 | else | |
127 | { | |
128 | $sql .= ' NOT NULL'; | |
129 | } | |
130 | ||
131 | if (array_key_exists('AUTO_INCREMENT', $attributes) && $attributes['AUTO_INCREMENT'] === TRUE) | |
132 | { | |
133 | $sql .= ' AUTO_INCREMENT'; | |
134 | } | |
135 | } | |
136 | ||
137 | // don't add a comma on the end of the last field | |
138 | if (++$current_field_count < count($fields)) | |
139 | { | |
140 | $sql .= ','; | |
141 | } | |
142 | } | |
143 | ||
144 | if (count($primary_keys) > 0) | |
145 | { | |
146 | $primary_keys = $this->db->_protect_identifiers($primary_keys); | |
147 | $sql .= ",\n\tPRIMARY KEY (" . implode(', ', $primary_keys) . ")"; | |
148 | } | |
149 | ||
150 | if (is_array($keys) && count($keys) > 0) | |
151 | { | |
152 | foreach ($keys as $key) | |
153 | { | |
154 | if (is_array($key)) | |
155 | { | |
156 | $key = $this->db->_protect_identifiers($key); | |
157 | } | |
158 | else | |
159 | { | |
160 | $key = array($this->db->_protect_identifiers($key)); | |
161 | } | |
162 | ||
163 | $sql .= ",\n\tFOREIGN KEY (" . implode(', ', $key) . ")"; | |
164 | } | |
165 | } | |
166 | ||
167 | $sql .= "\n)"; | |
168 | ||
169 | return $sql; | |
170 | } | |
171 | ||
172 | // -------------------------------------------------------------------- | |
173 | ||
174 | /** | |
175 | * Drop Table | |
176 | * | |
177 | * @access private | |
178 | * @return bool | |
179 | */ | |
180 | function _drop_table($table) | |
181 | { | |
182 | // Not a supported PDO feature | |
183 | if ($this->db->db_debug) | |
184 | { | |
185 | return $this->db->display_error('db_unsuported_feature'); | |
186 | } | |
187 | return FALSE; | |
188 | } | |
189 | ||
190 | // -------------------------------------------------------------------- | |
191 | ||
192 | /** | |
193 | * Alter table query | |
194 | * | |
195 | * Generates a platform-specific query so that a table can be altered | |
196 | * Called by add_column(), drop_column(), and column_alter(), | |
197 | * | |
198 | * @access private | |
199 | * @param string the ALTER type (ADD, DROP, CHANGE) | |
200 | * @param string the column name | |
201 | * @param string the table name | |
202 | * @param string the column definition | |
203 | * @param string the default value | |
204 | * @param boolean should 'NOT NULL' be added | |
205 | * @param string the field after which we should add the new field | |
206 | * @return object | |
207 | */ | |
208 | function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '') | |
209 | { | |
210 | $sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table)." $alter_type ".$this->db->_protect_identifiers($column_name); | |
211 | ||
212 | // DROP has everything it needs now. | |
213 | if ($alter_type == 'DROP') | |
214 | { | |
215 | return $sql; | |
216 | } | |
217 | ||
218 | $sql .= " $column_definition"; | |
219 | ||
220 | if ($default_value != '') | |
221 | { | |
222 | $sql .= " DEFAULT \"$default_value\""; | |
223 | } | |
224 | ||
225 | if ($null === NULL) | |
226 | { | |
227 | $sql .= ' NULL'; | |
228 | } | |
229 | else | |
230 | { | |
231 | $sql .= ' NOT NULL'; | |
232 | } | |
233 | ||
234 | if ($after_field != '') | |
235 | { | |
236 | $sql .= ' AFTER ' . $this->db->_protect_identifiers($after_field); | |
237 | } | |
238 | ||
239 | return $sql; | |
240 | ||
241 | } | |
242 | ||
243 | ||
244 | // -------------------------------------------------------------------- | |
245 | ||
246 | /** | |
247 | * Rename a table | |
248 | * | |
249 | * Generates a platform-specific query so that a table can be renamed | |
250 | * | |
251 | * @access private | |
252 | * @param string the old table name | |
253 | * @param string the new table name | |
254 | * @return string | |
255 | */ | |
256 | function _rename_table($table_name, $new_table_name) | |
257 | { | |
258 | $sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table_name)." RENAME TO ".$this->db->_protect_identifiers($new_table_name); | |
259 | return $sql; | |
260 | } | |
261 | ||
262 | ||
263 | } | |
264 | ||
265 | /* End of file pdo_forge.php */ | |
266 | /* Location: ./system/database/drivers/pdo/pdo_forge.php */ |