mirror of
https://github.com/silverstripe/silverstripe-mssql
synced 2024-10-22 08:05:53 +02:00
114 lines
3.4 KiB
PHP
114 lines
3.4 KiB
PHP
<?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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*/
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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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