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<?php |
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namespace SilverStripe\MSSQL; |
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/** |
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* Specific support for SQL Azure databases running on Windows Azure. |
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* Currently only supports the SQLSRV driver from Microsoft. |
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* |
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* Some important things about SQL Azure: |
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* |
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* Selecting a database is not supported. |
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* In order to change the database currently in use, you need to connect to |
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* the database using the "Database" parameter with sqlsrv_connect() |
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* |
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* Multiple active result sets are not supported. This means you can't |
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* have two query results open at once. |
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* |
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* Fulltext indexes are not supported. |
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* |
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* @author Sean Harvey <sean at silverstripe dot com> |
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* @package mssql |
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*/ |
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class MSSQLAzureDatabase extends MSSQLDatabase |
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{ |
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/** |
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* List of parameters used to create new Azure connections between databases |
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* |
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* @var array |
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*/ |
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protected $parameters = array(); |
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public function fullTextEnabled() |
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{ |
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return false; |
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} |
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public function __construct($parameters) |
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{ |
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$this->connectDatabase($parameters); |
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} |
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/** |
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* Connect to a SQL Azure database with the given parameters. |
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* @param array $parameters Connection parameters set by environment |
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* - server: The server, eg, localhost |
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* - username: The username to log on with |
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* - password: The password to log on with |
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* - database: The database to connect to |
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* - windowsauthentication: Not supported for Azure |
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*/ |
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public function connect($parameters) |
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{ |
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$this->parameters = $parameters; |
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$this->connectDatabase($parameters['database']); |
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} |
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/** |
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* Connect to a database using the provided parameters |
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* |
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* @param string $database |
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*/ |
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protected function connectDatabase($database) |
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{ |
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$parameters = $this->parameters; |
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$parameters['database'] = $database; |
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$parameters['multipleactiveresultsets'] = 0; |
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// Ensure that driver is available (required by PDO) |
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if (empty($parameters['driver'])) { |
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$parameters['driver'] = $this->getDatabaseServer(); |
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} |
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// Notify connector of parameters, instructing the connector |
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// to connect immediately to the Azure database |
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$this->connector->connect($parameters, true); |
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// Configure the connection |
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$this->query('SET QUOTED_IDENTIFIER ON'); |
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$this->query('SET TEXTSIZE 2147483647'); |
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} |
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/** |
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* Switches to the given database. |
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* |
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* IMPORTANT: SQL Azure doesn't support "USE", so we need |
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* to reinitialize the database connection with the requested |
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* database name. |
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* @see http://msdn.microsoft.com/en-us/library/windowsazure/ee336288.aspx |
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* |
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* @param string $name The database name to switch to |
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* @param bool $create |
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* @param bool|int $errorLevel |
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* @return bool |
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*/ |
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public function selectDatabase($name, $create = false, $errorLevel = E_USER_ERROR) |
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{ |
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$this->fullTextEnabled = null; |
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if (!$this->schemaManager->databaseExists($name)) { |
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// Check DB creation permisson |
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if (!$create) { |
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if ($errorLevel !== false) { |
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user_error("Attempted to connect to non-existing database \"$name\"", $errorLevel); |
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} |
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// Unselect database |
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$this->connector->unloadDatabase(); |
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return false; |
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} |
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$this->schemaManager->createDatabase($name); |
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} |
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$this->connectDatabase($name); |
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return true; |
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} |
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} |
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silverstripe /
silverstripe-mssql
