| 1 | <?php |
| 2 | /* |
| 3 | * $Id: Mssql.php 4050 2008-03-19 16:05:34Z romanb $ |
| 4 | * |
| 5 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 6 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 7 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 8 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 9 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 10 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 11 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 12 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 13 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 14 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 15 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 16 | * |
| 17 | * This software consists of voluntary contributions made by many individuals |
| 18 | * and is licensed under the LGPL. For more information, see |
| 19 | * <http://www.phpdoctrine.org>. |
| 20 | */ |
| 21 | Doctrine::autoload('Doctrine_Connection'); |
| 22 | /** |
| 23 | * Doctrine_Connection_Mssql |
| 24 | * |
| 25 | * @package Doctrine |
| 26 | * @subpackage Connection |
| 27 | * @license http://www.opensource.org/licenses/lgpl-license.php LGPL |
| 28 | * @author Konsta Vesterinen <kvesteri@cc.hut.fi> |
| 29 | * @author Lukas Smith <smith@pooteeweet.org> (PEAR MDB2 library) |
| 30 | * @version $Revision: 4050 $ |
| 31 | * @link www.phpdoctrine.org |
| 32 | * @since 1.0 |
| 33 | */ |
| 34 | class Doctrine_Connection_Mssql extends Doctrine_Connection |
| 35 | { |
| 36 | /** |
| 37 | * @var string $driverName the name of this connection driver |
| 38 | */ |
| 39 | protected $driverName = 'Mssql'; |
| 40 | |
| 41 | /** |
| 42 | * the constructor |
| 43 | * |
| 44 | * @param Doctrine_Manager $manager |
| 45 | * @param PDO $pdo database handle |
| 46 | */ |
| 47 | public function __construct(Doctrine_Manager $manager, $adapter) |
| 48 | { |
| 49 | // initialize all driver options |
| 50 | $this->supported = array( |
| 51 | 'sequences' => 'emulated', |
| 52 | 'indexes' => true, |
| 53 | 'affected_rows' => true, |
| 54 | 'transactions' => true, |
| 55 | 'summary_functions' => true, |
| 56 | 'order_by_text' => true, |
| 57 | 'current_id' => 'emulated', |
| 58 | 'limit_queries' => 'emulated', |
| 59 | 'LOBs' => true, |
| 60 | 'replace' => 'emulated', |
| 61 | 'sub_selects' => true, |
| 62 | 'auto_increment' => true, |
| 63 | 'primary_key' => true, |
| 64 | 'result_introspection' => true, |
| 65 | 'prepared_statements' => 'emulated', |
| 66 | ); |
| 67 | |
| 68 | parent::__construct($manager, $adapter); |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * quoteIdentifier |
| 73 | * Quote a string so it can be safely used as a table / column name |
| 74 | * |
| 75 | * Quoting style depends on which database driver is being used. |
| 76 | * |
| 77 | * @param string $identifier identifier name to be quoted |
| 78 | * @param bool $checkOption check the 'quote_identifier' option |
| 79 | * |
| 80 | * @return string quoted identifier string |
| 81 | */ |
| 82 | public function quoteIdentifier($identifier, $checkOption = false) |
| 83 | { |
| 84 | if ($checkOption && ! $this->getAttribute(Doctrine::ATTR_QUOTE_IDENTIFIER)) { |
| 85 | return $identifier; |
| 86 | } |
| 87 | |
| 88 | if (strpos($identifier, '.') !== false) { |
| 89 | $parts = explode('.', $identifier); |
| 90 | $quotedParts = array(); |
| 91 | foreach ($parts as $p) { |
| 92 | $quotedParts[] = $this->quoteIdentifier($p); |
| 93 | } |
| 94 | |
| 95 | return implode('.', $quotedParts); |
| 96 | } |
| 97 | |
| 98 | return '[' . str_replace(']', ']]', $identifier) . ']'; |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * Adds an adapter-specific LIMIT clause to the SELECT statement. |
| 103 | * [ borrowed from Zend Framework ] |
| 104 | * |
| 105 | * @param string $query |
| 106 | * @param mixed $limit |
| 107 | * @param mixed $offset |
| 108 | * @link http://lists.bestpractical.com/pipermail/rt-devel/2005-June/007339.html |
| 109 | * @return string |
| 110 | */ |
| 111 | public function modifyLimitQuery($query, $limit = false, $offset = false, $isManip = false) |
| 112 | { |
| 113 | if ($limit > 0) { |
| 114 | $count = intval($limit); |
| 115 | |
| 116 | $offset = intval($offset); |
| 117 | if ($offset < 0) { |
| 118 | throw new Doctrine_Connection_Exception("LIMIT argument offset=$offset is not valid"); |
| 119 | } |
| 120 | |
| 121 | $orderby = stristr($query, 'ORDER BY'); |
| 122 | if ($orderby !== false) { |
| 123 | $sort = (stripos($orderby, 'desc') !== false) ? 'desc' : 'asc'; |
| 124 | $order = str_ireplace('ORDER BY', '', $orderby); |
| 125 | $order = trim(preg_replace('/ASC|DESC/i', '', $order)); |
| 126 | } |
| 127 | |
| 128 | $query = preg_replace('/^SELECT\s/i', 'SELECT TOP ' . ($count+$offset) . ' ', $query); |
| 129 | |
| 130 | $query = 'SELECT * FROM (SELECT TOP ' . $count . ' * FROM (' . $query . ') AS inner_tbl'; |
| 131 | if ($orderby !== false) { |
| 132 | $query .= ' ORDER BY ' . $order . ' '; |
| 133 | $query .= (stripos($sort, 'asc') !== false) ? 'DESC' : 'ASC'; |
| 134 | } |
| 135 | $query .= ') AS outer_tbl'; |
| 136 | if ($orderby !== false) { |
| 137 | $query .= ' ORDER BY ' . $order . ' ' . $sort; |
| 138 | } |
| 139 | |
| 140 | return $query; |
| 141 | |
| 142 | } |
| 143 | |
| 144 | return $query; |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * return version information about the server |
| 149 | * |
| 150 | * @param bool $native determines if the raw version string should be returned |
| 151 | * @return mixed array/string with version information or MDB2 error object |
| 152 | */ |
| 153 | public function getServerVersion($native = false) |
| 154 | { |
| 155 | if ($this->serverInfo) { |
| 156 | $serverInfo = $this->serverInfo; |
| 157 | } else { |
| 158 | $query = 'SELECT @@VERSION'; |
| 159 | $serverInfo = $this->fetchOne($query); |
| 160 | } |
| 161 | // cache server_info |
| 162 | $this->serverInfo = $serverInfo; |
| 163 | if ( ! $native) { |
| 164 | if (preg_match('/([0-9]+)\.([0-9]+)\.([0-9]+)/', $serverInfo, $tmp)) { |
| 165 | $serverInfo = array( |
| 166 | 'major' => $tmp[1], |
| 167 | 'minor' => $tmp[2], |
| 168 | 'patch' => $tmp[3], |
| 169 | 'extra' => null, |
| 170 | 'native' => $serverInfo, |
| 171 | ); |
| 172 | } else { |
| 173 | $serverInfo = array( |
| 174 | 'major' => null, |
| 175 | 'minor' => null, |
| 176 | 'patch' => null, |
| 177 | 'extra' => null, |
| 178 | 'native' => $serverInfo, |
| 179 | ); |
| 180 | } |
| 181 | } |
| 182 | return $serverInfo; |
| 183 | } |
| 184 | |
| 185 | /** |
| 186 | * Checks if there's a sequence that exists. |
| 187 | * |
| 188 | * @param string $seq_name The sequence name to verify. |
| 189 | * @return boolean The value if the table exists or not |
| 190 | */ |
| 191 | public function checkSequence($seqName) |
| 192 | { |
| 193 | $query = 'SELECT * FROM ' . $seqName; |
| 194 | try { |
| 195 | $this->exec($query); |
| 196 | } catch(Doctrine_Connection_Exception $e) { |
| 197 | if ($e->getPortableCode() == Doctrine::ERR_NOSUCHTABLE) { |
| 198 | return false; |
| 199 | } |
| 200 | |
| 201 | throw $e; |
| 202 | } |
| 203 | return true; |
| 204 | } |
| 205 | } |