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<?php |
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/** |
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* Adds support for Microsoft SQLSRV databases |
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* |
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* PHP Version 5 |
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* |
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* @category Core |
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* @package Database |
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* @author Hans-Joachim Piepereit <[email protected]> |
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* @copyright 2013 cSphere Team |
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* @license http://opensource.org/licenses/bsd-license Simplified BSD License |
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* @link http://www.csphere.eu |
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**/ |
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namespace csphere\core\database; |
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/** |
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* Adds support for Microsoft SQLSRV databases |
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* |
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* @category Core |
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* @package Database |
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* @author Hans-Joachim Piepereit <[email protected]> |
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* @copyright 2013 cSphere Team |
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* @license http://opensource.org/licenses/bsd-license Simplified BSD License |
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* @link http://www.csphere.eu |
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**/ |
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class Driver_PDO_SQLSRV extends Base_PDO |
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{ |
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/** |
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* Creates the database handler object |
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* |
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* @param array $config Configuration details as an array |
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* |
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* @throws \Exception |
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* |
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* @return \csphere\core\database\Driver_PDO_SQLSRV |
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**/ |
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public function __construct(array $config) |
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{ |
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parent::__construct($config); |
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if (!extension_loaded('pdo_sqlsrv')) { |
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throw new \Exception('Extension "pdo_sqlsrv" not found'); |
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} |
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$dsn = empty($config['host']) ? '' : |
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'server=' . $config['host'] . '; '; |
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// This adds support for passing the db file thats used |
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if (!empty($config['file'])) { |
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$file = \csphere\core\init\path() |
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. 'csphere/database/' . $config['file']; |
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$dsn .= 'AttachDBFileName=' . $file . '; '; |
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} |
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$dsn .= 'Database=' . $config['schema']; |
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$options = []; |
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// Use try catch to hide connection details |
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try { |
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$this->con = new \PDO( |
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'sqlsrv:' . $dsn, $config['username'], |
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$config['password'], $options |
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); |
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$this->con->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION); |
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} |
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catch(\PDOException $pdo_error) { |
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$this->error('Connect', [], $pdo_error->getMessage(), false); |
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} |
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} |
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/** |
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* Builds the query string part for limit and offset |
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* |
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* @param integer $first Number of the first dataset to show |
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* @param integer $max Number of datasets to show from first on |
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* |
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* @return string |
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**/ |
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protected function limits($first, $max) |
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{ |
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// This works since Microsoft SQL Server 2012 |
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$string = 'OFFSET ' . (int)$first . ' ROWS ' |
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. 'FETCH NEXT ' . (int)$max . ' ROWS ONLY'; |
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// Fix for selecting one result row without using ORDER BY |
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if ($max == 1) { |
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$string = 'ORDER BY NEWID() ' . $string; |
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} |
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return $string; |
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} |
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/** |
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* Replaces driver specific query placeholders |
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* |
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* @param string $replace The string to use for replaces |
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* |
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* @return string |
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**/ |
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protected function replace($replace) |
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{ |
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$change_sqlsrv = ['{engine}' => '', |
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'{integer}' => 'int', |
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'{serial}' => 'int IDENTITY(1,1)', |
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'{text}' => 'text', |
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'{longtext}' => 'text', |
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'{varchar}' => 'varchar']; |
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foreach ($change_sqlsrv AS $key => $sqlsrv) { |
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$replace = str_replace($key, $sqlsrv, $replace); |
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} |
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// There is no support for manual table optimizations |
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$replace = preg_replace("={optimize}(.*?[;])=si", '', $replace); |
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// Workaround to have a check for existing tables |
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$pattern = "=^DROP TABLE IF EXISTS ([\S]*?)$=si"; |
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$rewrite = "IF (SELECT COUNT(*) FROM sysobjects WHERE type = 'U'" |
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. " AND name = '\\1') > 0 DROP TABLE \\1"; |
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$replace = preg_replace($pattern, $rewrite, $replace); |
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return $replace; |
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} |
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/** |
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* Returns a formatted array with statistics |
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* |
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* @return array |
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**/ |
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public function info() |
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{ |
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// Get general PDO information |
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$info = parent::info(); |
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// Client should be an array in this driver extension |
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if (is_array($info['client'])) { |
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$info['client'] = $info['client']['DriverVer'] . ' (ext ' |
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. $info['client']['ExtensionVer'] . ')'; |
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} |
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// Get encoding of database |
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$query = 'SELECT collation_name AS encoding FROM sys.databases ' |
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. 'WHERE database_id = DB_ID()'; |
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$encoding = $this->query($query, [], 0, 0); |
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$info['encoding'] = 'Collation ' . $encoding[0]['encoding']; |
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// Get size of database |
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$query = 'SELECT SUM(size) AS size FROM sys.master_files ' |
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. 'WHERE type = 0 AND database_id = DB_ID() GROUP BY database_id'; |
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$size = $this->query($query, [], 0, 0); |
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$info['size'] = $size[0]['size'] * 8192; |
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// Get amount of tables |
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$query = 'SELECT COUNT(*) AS tables FROM information_schema.tables ' |
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. 'WHERE table_type = \'base table\''; |
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$tables = $this->query($query, [], 0, 0); |
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$info['tables'] = $tables[0]['tables']; |
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return $info; |
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} |
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} |
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csphere-cms /
cSphere
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Adding a
@returnannotation to a constructor is not recommended, since a constructor does not have a meaningful return value.Please refer to the PHP core documentation on constructors.