namespace cleanup.

yii/db/Connection.php

@@ -7,6 +7,8 @@
 
 namespace yii\db;
 
+use PDO;
+use Yii;
 use yii\base\Component;
 use yii\base\InvalidConfigException;
 use yii\base\NotSupportedException;
@@ -128,7 +130,7 @@ class Connection extends Component
 	 */
 	public $attributes;
 	/**
-	 * @var \PDO the PHP PDO instance associated with this DB connection.
+	 * @var PDO the PHP PDO instance associated with this DB connection.
 	 * This property is mainly managed by [[open()]] and [[close()]] methods.
 	 * When a DB connection is active, this property will represent a PDO instance;
 	 * otherwise, it will be null.
@@ -229,7 +231,7 @@ class Connection extends Component
 	/**
 	 * @var array mapping between PDO driver names and [[Schema]] classes.
 	 * The keys of the array are PDO driver names while the values the corresponding
-	 * schema class name or configuration. Please refer to [[\Yii::createObject()]] for
+	 * schema class name or configuration. Please refer to [[Yii::createObject()]] for
 	 * details on how to specify a configuration.
 	 *
 	 * This property is mainly used by [[getSchema()]] when fetching the database schema information.
@@ -313,12 +315,12 @@ class Connection extends Component
 				throw new InvalidConfigException('Connection::dsn cannot be empty.');
 			}
 			try {
-				\Yii::trace('Opening DB connection: ' . $this->dsn, __METHOD__);
+				Yii::trace('Opening DB connection: ' . $this->dsn, __METHOD__);
 				$this->pdo = $this->createPdoInstance();
 				$this->initConnection();
 			}
 			catch (\PDOException $e) {
-				\Yii::error("Failed to open DB connection ({$this->dsn}): " . $e->getMessage(), __METHOD__);
+				Yii::error("Failed to open DB connection ({$this->dsn}): " . $e->getMessage(), __METHOD__);
 				$message = YII_DEBUG ? 'Failed to open DB connection: ' . $e->getMessage() : 'Failed to open DB connection.';
 				throw new Exception($message, $e->errorInfo, (int)$e->getCode());
 			}
@@ -332,7 +334,7 @@ class Connection extends Component
 	public function close()
 	{
 		if ($this->pdo !== null) {
-			\Yii::trace('Closing DB connection: ' . $this->dsn, __METHOD__);
+			Yii::trace('Closing DB connection: ' . $this->dsn, __METHOD__);
 			$this->pdo = null;
 			$this->_schema = null;
 			$this->_transaction = null;
@@ -344,11 +346,11 @@ class Connection extends Component
 	 * This method is called by [[open]] to establish a DB connection.
 	 * The default implementation will create a PHP PDO instance.
 	 * You may override this method if the default PDO needs to be adapted for certain DBMS.
-	 * @return \PDO the pdo instance
+	 * @return PDO the pdo instance
 	 */
 	protected function createPdoInstance()
 	{
-		$pdoClass = '\PDO';
+		$pdoClass = 'PDO';
 		if (($pos = strpos($this->dsn, ':')) !== false) {
 			$driver = strtolower(substr($this->dsn, 0, $pos));
 			if ($driver === 'mssql' || $driver === 'dblib' || $driver === 'sqlsrv') {
@@ -367,9 +369,9 @@ class Connection extends Component
 	 */
 	protected function initConnection()
 	{
-		$this->pdo->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
-		if ($this->emulatePrepare !== null && constant('\PDO::ATTR_EMULATE_PREPARES')) {
-			$this->pdo->setAttribute(\PDO::ATTR_EMULATE_PREPARES, $this->emulatePrepare);
+		$this->pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+		if ($this->emulatePrepare !== null && constant('PDO::ATTR_EMULATE_PREPARES')) {
+			$this->pdo->setAttribute(PDO::ATTR_EMULATE_PREPARES, $this->emulatePrepare);
 		}
 		if ($this->charset !== null && in_array($this->getDriverName(), array('pgsql', 'mysql', 'mysqli'))) {
 			$this->pdo->exec('SET NAMES ' . $this->pdo->quote($this->charset));
@@ -428,7 +430,7 @@ class Connection extends Component
 		} else {
 			$driver = $this->getDriverName();
 			if (isset($this->schemaMap[$driver])) {
-				$this->_schema = \Yii::createObject($this->schemaMap[$driver]);
+				$this->_schema = Yii::createObject($this->schemaMap[$driver]);
 				$this->_schema->db = $this;
 				return $this->_schema;
 			} else {
@@ -536,7 +538,7 @@ class Connection extends Component
 		if (($pos = strpos($this->dsn, ':')) !== false) {
 			return strtolower(substr($this->dsn, 0, $pos));
 		} else {
-			return strtolower($this->pdo->getAttribute(\PDO::ATTR_DRIVER_NAME));
+			return strtolower($this->pdo->getAttribute(PDO::ATTR_DRIVER_NAME));
 		}
 	}
 
@@ -551,7 +553,7 @@ class Connection extends Component
 	 */
 	public function getQuerySummary()
 	{
-		$logger = \Yii::getLogger();
+		$logger = Yii::getLogger();
 		$timings = $logger->getProfiling(array('yii\db\Command::query', 'yii\db\Command::execute'));
 		$count = count($timings);
 		$time = 0;