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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 | * @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 | * MySQLi Forge Class | |
20 | * | |
21 | * @category Database | |
22 | * @author ExpressionEngine Dev Team | |
23 | * @link http://codeigniter.com/user_guide/database/ | |
24 | */ | |
25 | class CI_DB_mysqli_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($name) | |
35 | { | |
36 | return "CREATE DATABASE ".$name; | |
37 | } | |
38 | ||
39 | // -------------------------------------------------------------------- | |
40 | ||
41 | /** | |
42 | * Drop database | |
43 | * | |
44 | * @access private | |
45 | * @param string the database name | |
46 | * @return bool | |
47 | */ | |
48 | function _drop_database($name) | |
49 | { | |
50 | return "DROP DATABASE ".$name; | |
51 | } | |
52 | ||
53 | // -------------------------------------------------------------------- | |
54 | ||
55 | /** | |
56 | * Process Fields | |
57 | * | |
58 | * @access private | |
59 | * @param mixed the fields | |
60 | * @return string | |
61 | */ | |
62 | function _process_fields($fields) | |
63 | { | |
64 | $current_field_count = 0; | |
65 | $sql = ''; | |
66 | ||
67 | foreach ($fields as $field=>$attributes) | |
68 | { | |
69 | // Numeric field names aren't allowed in databases, so if the key is | |
70 | // numeric, we know it was assigned by PHP and the developer manually | |
71 | // entered the field information, so we'll simply add it to the list | |
72 | if (is_numeric($field)) | |
73 | { | |
74 | $sql .= "\n\t$attributes"; | |
75 | } | |
76 | else | |
77 | { | |
78 | $attributes = array_change_key_case($attributes, CASE_UPPER); | |
79 | ||
80 | $sql .= "\n\t".$this->db->_protect_identifiers($field); | |
81 | ||
82 | if (array_key_exists('NAME', $attributes)) | |
83 | { | |
84 | $sql .= ' '.$this->db->_protect_identifiers($attributes['NAME']).' '; | |
85 | } | |
86 | ||
87 | if (array_key_exists('TYPE', $attributes)) | |
88 | { | |
89 | $sql .= ' '.$attributes['TYPE']; | |
90 | } | |
91 | ||
92 | if (array_key_exists('CONSTRAINT', $attributes)) | |
93 | { | |
94 | $sql .= '('.$attributes['CONSTRAINT'].')'; | |
95 | } | |
96 | ||
97 | if (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE) | |
98 | { | |
99 | $sql .= ' UNSIGNED'; | |
100 | } | |
101 | ||
102 | if (array_key_exists('DEFAULT', $attributes)) | |
103 | { | |
104 | $sql .= ' DEFAULT \''.$attributes['DEFAULT'].'\''; | |
105 | } | |
106 | ||
107 | if (array_key_exists('NULL', $attributes) && $attributes['NULL'] === TRUE) | |
108 | { | |
109 | $sql .= ' NULL'; | |
110 | } | |
111 | else | |
112 | { | |
113 | $sql .= ' NOT NULL'; | |
114 | } | |
115 | ||
116 | if (array_key_exists('AUTO_INCREMENT', $attributes) && $attributes['AUTO_INCREMENT'] === TRUE) | |
117 | { | |
118 | $sql .= ' AUTO_INCREMENT'; | |
119 | } | |
120 | } | |
121 | ||
122 | // don't add a comma on the end of the last field | |
123 | if (++$current_field_count < count($fields)) | |
124 | { | |
125 | $sql .= ','; | |
126 | } | |
127 | } | |
128 | ||
129 | return $sql; | |
130 | } | |
131 | ||
132 | // -------------------------------------------------------------------- | |
133 | ||
134 | /** | |
135 | * Create Table | |
136 | * | |
137 | * @access private | |
138 | * @param string the table name | |
139 | * @param mixed the fields | |
140 | * @param mixed primary key(s) | |
141 | * @param mixed key(s) | |
142 | * @param boolean should 'IF NOT EXISTS' be added to the SQL | |
143 | * @return bool | |
144 | */ | |
145 | function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists) | |
146 | { | |
147 | $sql = 'CREATE TABLE '; | |
148 | ||
149 | if ($if_not_exists === TRUE) | |
150 | { | |
151 | $sql .= 'IF NOT EXISTS '; | |
152 | } | |
153 | ||
154 | $sql .= $this->db->_escape_identifiers($table)." ("; | |
155 | ||
156 | $sql .= $this->_process_fields($fields); | |
157 | ||
158 | if (count($primary_keys) > 0) | |
159 | { | |
160 | $key_name = $this->db->_protect_identifiers(implode('_', $primary_keys)); | |
161 | $primary_keys = $this->db->_protect_identifiers($primary_keys); | |
162 | $sql .= ",\n\tPRIMARY KEY ".$key_name." (" . implode(', ', $primary_keys) . ")"; | |
163 | } | |
164 | ||
165 | if (is_array($keys) && count($keys) > 0) | |
166 | { | |
167 | foreach ($keys as $key) | |
168 | { | |
169 | if (is_array($key)) | |
170 | { | |
171 | $key_name = $this->db->_protect_identifiers(implode('_', $key)); | |
172 | $key = $this->db->_protect_identifiers($key); | |
173 | } | |
174 | else | |
175 | { | |
176 | $key_name = $this->db->_protect_identifiers($key); | |
177 | $key = array($key_name); | |
178 | } | |
179 | ||
180 | $sql .= ",\n\tKEY {$key_name} (" . implode(', ', $key) . ")"; | |
181 | } | |
182 | } | |
183 | ||
184 | $sql .= "\n) DEFAULT CHARACTER SET {$this->db->char_set} COLLATE {$this->db->dbcollat};"; | |
185 | ||
186 | return $sql; | |
187 | } | |
188 | ||
189 | // -------------------------------------------------------------------- | |
190 | ||
191 | /** | |
192 | * Drop Table | |
193 | * | |
194 | * @access private | |
195 | * @return string | |
196 | */ | |
197 | function _drop_table($table) | |
198 | { | |
199 | return "DROP TABLE IF EXISTS ".$this->db->_escape_identifiers($table); | |
200 | } | |
201 | ||
202 | // -------------------------------------------------------------------- | |
203 | ||
204 | /** | |
205 | * Alter table query | |
206 | * | |
207 | * Generates a platform-specific query so that a table can be altered | |
208 | * Called by add_column(), drop_column(), and column_alter(), | |
209 | * | |
210 | * @access private | |
211 | * @param string the ALTER type (ADD, DROP, CHANGE) | |
212 | * @param string the column name | |
213 | * @param array fields | |
214 | * @param string the field after which we should add the new field | |
215 | * @return object | |
216 | */ | |
217 | function _alter_table($alter_type, $table, $fields, $after_field = '') | |
218 | { | |
219 | $sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table)." $alter_type "; | |
220 | ||
221 | // DROP has everything it needs now. | |
222 | if ($alter_type == 'DROP') | |
223 | { | |
224 | return $sql.$this->db->_protect_identifiers($fields); | |
225 | } | |
226 | ||
227 | $sql .= $this->_process_fields($fields); | |
228 | ||
229 | if ($after_field != '') | |
230 | { | |
231 | $sql .= ' AFTER ' . $this->db->_protect_identifiers($after_field); | |
232 | } | |
233 | ||
234 | return $sql; | |
235 | } | |
236 | ||
237 | // -------------------------------------------------------------------- | |
238 | ||
239 | /** | |
240 | * Rename a table | |
241 | * | |
242 | * Generates a platform-specific query so that a table can be renamed | |
243 | * | |
244 | * @access private | |
245 | * @param string the old table name | |
246 | * @param string the new table name | |
247 | * @return string | |
248 | */ | |
249 | function _rename_table($table_name, $new_table_name) | |
250 | { | |
251 | $sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table_name)." RENAME TO ".$this->db->_protect_identifiers($new_table_name); | |
252 | return $sql; | |
253 | } | |
254 | ||
255 | } | |
256 | ||
257 | /* End of file mysqli_forge.php */ | |
258 | /* Location: ./system/database/drivers/mysqli/mysqli_forge.php */ |