| commit | author | age | ||
| 0d94fd | 1 | <?php |
| AM | 2 | |
| 3d231c | 3 | /** |
| 0d94fd | 4 | +-----------------------------------------------------------------------+ |
| AM | 5 | | program/include/rcube_db_mssql.php | |
| 6 | | | | |
| 7 | | This file is part of the Roundcube Webmail client | | |
| 8 | | Copyright (C) 2005-2012, The Roundcube Dev Team | | |
| 9 | | | | |
| 10 | | Licensed under the GNU General Public License version 3 or | | |
| 11 | | any later version with exceptions for skins & plugins. | | |
| 12 | | See the README file for a full license statement. | | |
| 13 | | | | |
| 14 | | PURPOSE: | | |
| 15 | | Database wrapper class that implements PHP PDO functions | | |
| 16 | | for MS SQL Server database | | |
| 17 | | | | |
| 18 | +-----------------------------------------------------------------------+ | |
| 19 | | Author: Aleksander Machniak <alec@alec.pl> | | |
| 20 | +-----------------------------------------------------------------------+ | |
| 21 | */ | |
| 22 | ||
| 23 | ||
| 24 | /** | |
| 25 | * Database independent query interface | |
| 26 | * This is a wrapper for the PHP PDO | |
| 27 | * | |
| 9ab346 | 28 | * @package Framework |
| AM | 29 | * @subpackage Database |
| 0d94fd | 30 | */ |
| AM | 31 | class rcube_db_mssql extends rcube_db |
| 32 | { | |
| 88107d | 33 | public $db_provider = 'mssql'; |
| TB | 34 | |
| 8c2375 | 35 | /** |
| AM | 36 | * Driver initialization |
| 37 | */ | |
| 0d94fd | 38 | protected function init() |
| AM | 39 | { |
| 40 | $this->options['identifier_start'] = '['; | |
| 41 | $this->options['identifier_end'] = ']'; | |
| 42 | } | |
| 43 | ||
| 8c2375 | 44 | /** |
| AM | 45 | * Character setting |
| 46 | */ | |
| 0d94fd | 47 | protected function set_charset($charset) |
| AM | 48 | { |
| 8c2375 | 49 | // UTF-8 is default |
| 0d94fd | 50 | } |
| AM | 51 | |
| 52 | /** | |
| 53 | * Return SQL function for current time and date | |
| 54 | * | |
| 55 | * @return string SQL function to use in query | |
| 56 | */ | |
| 57 | public function now() | |
| 58 | { | |
| 59 | return "getdate()"; | |
| 60 | } | |
| 61 | ||
| 62 | /** | |
| 63 | * Return SQL statement to convert a field value into a unix timestamp | |
| 64 | * | |
| 65 | * This method is deprecated and should not be used anymore due to limitations | |
| 66 | * of timestamp functions in Mysql (year 2038 problem) | |
| 67 | * | |
| 3d231c | 68 | * @param string $field Field name |
| 0d94fd | 69 | * |
| 3d231c | 70 | * @return string SQL statement to use in query |
| 0d94fd | 71 | * @deprecated |
| AM | 72 | */ |
| 73 | public function unixtimestamp($field) | |
| 74 | { | |
| 75 | return "DATEDIFF(second, '19700101', $field) + DATEDIFF(second, GETDATE(), GETUTCDATE())"; | |
| 76 | } | |
| 77 | ||
| 78 | /** | |
| 79 | * Abstract SQL statement for value concatenation | |
| 80 | * | |
| 81 | * @return string SQL statement to be used in query | |
| 82 | */ | |
| 83 | public function concat(/* col1, col2, ... */) | |
| 84 | { | |
| 85 | $args = func_get_args(); | |
| 86 | ||
| 87 | if (is_array($args[0])) { | |
| 88 | $args = $args[0]; | |
| 89 | } | |
| 90 | ||
| 91 | return '(' . join('+', $args) . ')'; | |
| 92 | } | |
| 93 | ||
| 94 | /** | |
| 95 | * Adds TOP (LIMIT,OFFSET) clause to the query | |
| 96 | * | |
| 3d231c | 97 | * @param string $query SQL query |
| AM | 98 | * @param int $limit Number of rows |
| 99 | * @param int $offset Offset | |
| 8c2375 | 100 | * |
| AM | 101 | * @return string SQL query |
| 0d94fd | 102 | */ |
| AM | 103 | protected function set_limit($query, $limit = 0, $offset = 0) |
| 104 | { | |
| 8c2375 | 105 | $limit = intval($limit); |
| AM | 106 | $offset = intval($offset); |
| 107 | ||
| 108 | $orderby = stristr($query, 'ORDER BY'); | |
| 109 | if ($orderby !== false) { | |
| 110 | $sort = (stripos($orderby, ' desc') !== false) ? 'desc' : 'asc'; | |
| 111 | $order = str_ireplace('ORDER BY', '', $orderby); | |
| 112 | $order = trim(preg_replace('/\bASC\b|\bDESC\b/i', '', $order)); | |
| 0d94fd | 113 | } |
| AM | 114 | |
| 8c2375 | 115 | $query = preg_replace('/^SELECT\s/i', 'SELECT TOP ' . ($limit + $offset) . ' ', $query); |
| AM | 116 | |
| 117 | $query = 'SELECT * FROM (SELECT TOP ' . $limit . ' * FROM (' . $query . ') AS inner_tbl'; | |
| 118 | if ($orderby !== false) { | |
| 119 | $query .= ' ORDER BY ' . $order . ' '; | |
| 120 | $query .= (stripos($sort, 'asc') !== false) ? 'DESC' : 'ASC'; | |
| 121 | } | |
| 122 | $query .= ') AS outer_tbl'; | |
| 123 | if ($orderby !== false) { | |
| 124 | $query .= ' ORDER BY ' . $order . ' ' . $sort; | |
| 125 | } | |
| 0d94fd | 126 | |
| AM | 127 | return $query; |
| 128 | } | |
| 129 | ||
| 130 | /** | |
| 8c2375 | 131 | * Returns PDO DSN string from DSN array |
| 0d94fd | 132 | */ |
| AM | 133 | protected function dsn_string($dsn) |
| 134 | { | |
| 135 | $params = array(); | |
| 136 | $result = $dsn['phptype'] . ':'; | |
| 137 | ||
| 138 | if ($dsn['hostspec']) { | |
| 139 | $host = $dsn['hostspec']; | |
| 140 | if ($dsn['port']) { | |
| 141 | $host .= ',' . $dsn['port']; | |
| 142 | } | |
| 143 | $params[] = 'host=' . $host; | |
| 144 | } | |
| 145 | ||
| 146 | if ($dsn['database']) { | |
| 147 | $params[] = 'dbname=' . $dsn['database']; | |
| 148 | } | |
| 149 | ||
| 150 | if (!empty($params)) { | |
| 151 | $result .= implode(';', $params); | |
| 152 | } | |
| 153 | ||
| 154 | return $result; | |
| 155 | } | |
| 156 | } | |
