| 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 | /** |
| AM | 32 | * Driver initialization |
| 33 | */ | |
| 0d94fd | 34 | protected function init() |
| AM | 35 | { |
| 36 | $this->options['identifier_start'] = '['; | |
| 37 | $this->options['identifier_end'] = ']'; | |
| 38 | } | |
| 39 | ||
| 8c2375 | 40 | /** |
| AM | 41 | * Database character set setting |
| 42 | */ | |
| 0d94fd | 43 | protected function set_charset($charset) |
| AM | 44 | { |
| 8c2375 | 45 | // UTF-8 is default |
| 0d94fd | 46 | } |
| AM | 47 | |
| 48 | /** | |
| 49 | * Return SQL function for current time and date | |
| 50 | * | |
| 51 | * @return string SQL function to use in query | |
| 52 | */ | |
| 53 | public function now() | |
| 54 | { | |
| 55 | return "getdate()"; | |
| 56 | } | |
| 57 | ||
| 58 | /** | |
| 59 | * Return SQL statement to convert a field value into a unix timestamp | |
| 60 | * | |
| 61 | * This method is deprecated and should not be used anymore due to limitations | |
| 62 | * of timestamp functions in Mysql (year 2038 problem) | |
| 63 | * | |
| 3d231c | 64 | * @param string $field Field name |
| 0d94fd | 65 | * |
| 3d231c | 66 | * @return string SQL statement to use in query |
| 0d94fd | 67 | * @deprecated |
| AM | 68 | */ |
| 69 | public function unixtimestamp($field) | |
| 70 | { | |
| 71 | return "DATEDIFF(second, '19700101', $field) + DATEDIFF(second, GETDATE(), GETUTCDATE())"; | |
| 72 | } | |
| 73 | ||
| 74 | /** | |
| 75 | * Abstract SQL statement for value concatenation | |
| 76 | * | |
| 77 | * @return string SQL statement to be used in query | |
| 78 | */ | |
| 79 | public function concat(/* col1, col2, ... */) | |
| 80 | { | |
| 81 | $args = func_get_args(); | |
| 82 | ||
| 83 | if (is_array($args[0])) { | |
| 84 | $args = $args[0]; | |
| 85 | } | |
| 86 | ||
| 87 | return '(' . join('+', $args) . ')'; | |
| 88 | } | |
| 89 | ||
| 90 | /** | |
| 91 | * Adds TOP (LIMIT,OFFSET) clause to the query | |
| 92 | * | |
| 3d231c | 93 | * @param string $query SQL query |
| AM | 94 | * @param int $limit Number of rows |
| 95 | * @param int $offset Offset | |
| 8c2375 | 96 | * |
| AM | 97 | * @return string SQL query |
| 0d94fd | 98 | */ |
| AM | 99 | protected function set_limit($query, $limit = 0, $offset = 0) |
| 100 | { | |
| 5354c5 | 101 | $limit = intval($limit); |
| AM | 102 | $offset = intval($offset); |
| ec6a77 | 103 | $end = $offset + $limit; |
| AM | 104 | |
| 105 | // query without OFFSET | |
| 106 | if (!$offset) { | |
| 107 | $query = preg_replace('/^SELECT\s/i', "SELECT TOP $limit ", $query); | |
| 108 | return $query; | |
| 109 | } | |
| 5354c5 | 110 | |
| AM | 111 | $orderby = stristr($query, 'ORDER BY'); |
| ec6a77 | 112 | $offset += 1; |
| AM | 113 | |
| 5354c5 | 114 | if ($orderby !== false) { |
| ec6a77 | 115 | $query = trim(substr($query, 0, -1 * strlen($orderby))); |
| AM | 116 | } |
| 117 | else { | |
| 118 | // it shouldn't happen, paging without sorting has not much sense | |
| 119 | // @FIXME: I don't know how to build paging query without ORDER BY | |
| 120 | $orderby = "ORDER BY 1"; | |
| 0d94fd | 121 | } |
| AM | 122 | |
| ec6a77 | 123 | $query = preg_replace('/^SELECT\s/i', '', $query); |
| AM | 124 | $query = "WITH paging AS (SELECT ROW_NUMBER() OVER ($orderby) AS [RowNumber], $query)" |
| 125 | . " SELECT * FROM paging WHERE [RowNumber] BETWEEN $offset AND $end ORDER BY [RowNumber]"; | |
| 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 | $result = 'sqlsrv:'; | |
| 137 | ||
| 138 | if ($dsn['hostspec']) { | |
| 139 | $host = $dsn['hostspec']; | |
| 140 | ||
| 141 | if ($dsn['port']) { | |
| 142 | $host .= ',' . $dsn['port']; | |
| 143 | } | |
| 144 | $params[] = 'Server=' . $host; | |
| 145 | } | |
| 146 | ||
| 147 | if ($dsn['database']) { | |
| 148 | $params[] = 'Database=' . $dsn['database']; | |
| 149 | } | |
| 150 | ||
| 151 | if (!empty($params)) { | |
| 152 | $result .= implode(';', $params); | |
| 153 | } | |
| 154 | ||
| 155 | return $result; | |
| 156 | } | |
| 157 | } | |
