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