| commit | author | age | ||
| 0d94fd | 1 | <?php |
| AM | 2 | |
| 3d231c | 3 | /** |
| 0d94fd | 4 | +-----------------------------------------------------------------------+ |
| AM | 5 | | This file is part of the Roundcube Webmail client | |
| 6 | | Copyright (C) 2005-2012, The Roundcube Dev Team | | |
| 7 | | | | |
| 8 | | Licensed under the GNU General Public License version 3 or | | |
| 9 | | any later version with exceptions for skins & plugins. | | |
| 10 | | See the README file for a full license statement. | | |
| 11 | | | | |
| 12 | | PURPOSE: | | |
| 13 | | Database wrapper class that implements PHP PDO functions | | |
| 14 | | for MS SQL Server database | | |
| 15 | +-----------------------------------------------------------------------+ | |
| 16 | | Author: Aleksander Machniak <alec@alec.pl> | | |
| 17 | +-----------------------------------------------------------------------+ | |
| 18 | */ | |
| 19 | ||
| 20 | /** | |
| 21 | * Database independent query interface | |
| 22 | * This is a wrapper for the PHP PDO | |
| 23 | * | |
| 9ab346 | 24 | * @package Framework |
| AM | 25 | * @subpackage Database |
| 0d94fd | 26 | */ |
| AM | 27 | class rcube_db_sqlsrv extends rcube_db |
| 28 | { | |
| 88107d | 29 | public $db_provider = 'mssql'; |
| TB | 30 | |
| 8c2375 | 31 | /** |
| d18640 | 32 | * Object constructor |
| AM | 33 | * |
| 34 | * @param string $db_dsnw DSN for read/write operations | |
| 35 | * @param string $db_dsnr Optional DSN for read only operations | |
| 36 | * @param bool $pconn Enables persistent connections | |
| 8c2375 | 37 | */ |
| d18640 | 38 | public function __construct($db_dsnw, $db_dsnr = '', $pconn = false) |
| 0d94fd | 39 | { |
| d18640 | 40 | parent::__construct($db_dsnw, $db_dsnr, $pconn); |
| AM | 41 | |
| 0d94fd | 42 | $this->options['identifier_start'] = '['; |
| AM | 43 | $this->options['identifier_end'] = ']'; |
| 44 | } | |
| 45 | ||
| 46 | /** | |
| 66407a | 47 | * Driver-specific configuration of database connection |
| AM | 48 | * |
| 49 | * @param array $dsn DSN for DB connections | |
| 50 | * @param PDO $dbh Connection handler | |
| 51 | */ | |
| 52 | protected function conn_configure($dsn, $dbh) | |
| 53 | { | |
| 54 | // Set date format in case of non-default language (#1488918) | |
| 55 | $this->query("SET DATEFORMAT ymd"); | |
| 56 | } | |
| 57 | ||
| 58 | /** | |
| 0d94fd | 59 | * Return SQL function for current time and date |
| AM | 60 | * |
| aa44ce | 61 | * @param int $interval Optional interval (in seconds) to add/subtract |
| AM | 62 | * |
| 0d94fd | 63 | * @return string SQL function to use in query |
| AM | 64 | */ |
| aa44ce | 65 | public function now($interval = 0) |
| 0d94fd | 66 | { |
| aa44ce | 67 | if ($interval) { |
| AM | 68 | $interval = intval($interval); |
| 69 | return "dateadd(second, $interval, getdate())"; | |
| 70 | } | |
| 71 | ||
| 0d94fd | 72 | return "getdate()"; |
| AM | 73 | } |
| 74 | ||
| 75 | /** | |
| 76 | * Return SQL statement to convert a field value into a unix timestamp | |
| 77 | * | |
| 78 | * This method is deprecated and should not be used anymore due to limitations | |
| 79 | * of timestamp functions in Mysql (year 2038 problem) | |
| 80 | * | |
| 3d231c | 81 | * @param string $field Field name |
| 0d94fd | 82 | * |
| 3d231c | 83 | * @return string SQL statement to use in query |
| 0d94fd | 84 | * @deprecated |
| AM | 85 | */ |
| 86 | public function unixtimestamp($field) | |
| 87 | { | |
| 88 | return "DATEDIFF(second, '19700101', $field) + DATEDIFF(second, GETDATE(), GETUTCDATE())"; | |
| 89 | } | |
| 90 | ||
| 91 | /** | |
| 92 | * Abstract SQL statement for value concatenation | |
| 93 | * | |
| 94 | * @return string SQL statement to be used in query | |
| 95 | */ | |
| 96 | public function concat(/* col1, col2, ... */) | |
| 97 | { | |
| 98 | $args = func_get_args(); | |
| 99 | ||
| 100 | if (is_array($args[0])) { | |
| 101 | $args = $args[0]; | |
| 102 | } | |
| 103 | ||
| 104 | return '(' . join('+', $args) . ')'; | |
| 105 | } | |
| 106 | ||
| 107 | /** | |
| 108 | * Adds TOP (LIMIT,OFFSET) clause to the query | |
| 109 | * | |
| 3d231c | 110 | * @param string $query SQL query |
| AM | 111 | * @param int $limit Number of rows |
| 112 | * @param int $offset Offset | |
| 8c2375 | 113 | * |
| AM | 114 | * @return string SQL query |
| 0d94fd | 115 | */ |
| AM | 116 | protected function set_limit($query, $limit = 0, $offset = 0) |
| 117 | { | |
| 5354c5 | 118 | $limit = intval($limit); |
| AM | 119 | $offset = intval($offset); |
| ec6a77 | 120 | $end = $offset + $limit; |
| AM | 121 | |
| 122 | // query without OFFSET | |
| 123 | if (!$offset) { | |
| 124 | $query = preg_replace('/^SELECT\s/i', "SELECT TOP $limit ", $query); | |
| 125 | return $query; | |
| 126 | } | |
| 5354c5 | 127 | |
| AM | 128 | $orderby = stristr($query, 'ORDER BY'); |
| ec6a77 | 129 | $offset += 1; |
| AM | 130 | |
| 5354c5 | 131 | if ($orderby !== false) { |
| ec6a77 | 132 | $query = trim(substr($query, 0, -1 * strlen($orderby))); |
| AM | 133 | } |
| 134 | else { | |
| 135 | // it shouldn't happen, paging without sorting has not much sense | |
| 136 | // @FIXME: I don't know how to build paging query without ORDER BY | |
| 137 | $orderby = "ORDER BY 1"; | |
| 0d94fd | 138 | } |
| AM | 139 | |
| ec6a77 | 140 | $query = preg_replace('/^SELECT\s/i', '', $query); |
| AM | 141 | $query = "WITH paging AS (SELECT ROW_NUMBER() OVER ($orderby) AS [RowNumber], $query)" |
| 142 | . " SELECT * FROM paging WHERE [RowNumber] BETWEEN $offset AND $end ORDER BY [RowNumber]"; | |
| 0d94fd | 143 | |
| AM | 144 | return $query; |
| 145 | } | |
| 146 | ||
| 147 | /** | |
| 8c2375 | 148 | * Returns PDO DSN string from DSN array |
| 0d94fd | 149 | */ |
| AM | 150 | protected function dsn_string($dsn) |
| 151 | { | |
| 152 | $params = array(); | |
| 153 | $result = 'sqlsrv:'; | |
| 154 | ||
| 155 | if ($dsn['hostspec']) { | |
| 156 | $host = $dsn['hostspec']; | |
| 157 | ||
| 158 | if ($dsn['port']) { | |
| 159 | $host .= ',' . $dsn['port']; | |
| 160 | } | |
| 161 | $params[] = 'Server=' . $host; | |
| 162 | } | |
| 163 | ||
| 164 | if ($dsn['database']) { | |
| 165 | $params[] = 'Database=' . $dsn['database']; | |
| 166 | } | |
| 167 | ||
| 168 | if (!empty($params)) { | |
| 169 | $result .= implode(';', $params); | |
| 170 | } | |
| 171 | ||
| 172 | return $result; | |
| 173 | } | |
| 174 | } | |
