diff --git a/framework/base/HttpException.php b/framework/base/HttpException.php
index d2de5bc..ca753b9 100644
--- a/framework/base/HttpException.php
+++ b/framework/base/HttpException.php
@@ -41,4 +41,73 @@ class HttpException extends Exception
 		$this->statusCode = $status;
 		parent::__construct($message, $code);
 	}
+
+	/**
+	 * @return string the user-friendly name of this exception
+	 */
+	public function getName()
+	{
+		static $httpCodes = array(
+			100 => 'Continue',
+			101 => 'Switching Protocols',
+			102 => 'Processing',
+			118 => 'Connection timed out',
+			200 => 'OK',
+			201 => 'Created',
+			202 => 'Accepted',
+			203 => 'Non-Authoritative',
+			204 => 'No Content',
+			205 => 'Reset Content',
+			206 => 'Partial Content',
+			207 => 'Multi-Status',
+			210 => 'Content Different',
+			300 => 'Multiple Choices',
+			301 => 'Moved Permanently',
+			302 => 'Found',
+			303 => 'See Other',
+			304 => 'Not Modified',
+			305 => 'Use Proxy',
+			307 => 'Temporary Redirect',
+			310 => 'Too many Redirect',
+			400 => 'Bad Request',
+			401 => 'Unauthorized',
+			402 => 'Payment Required',
+			403 => 'Forbidden',
+			404 => 'Not Found',
+			405 => 'Method Not Allowed',
+			406 => 'Not Acceptable',
+			407 => 'Proxy Authentication Required',
+			408 => 'Request Time-out',
+			409 => 'Conflict',
+			410 => 'Gone',
+			411 => 'Length Required',
+			412 => 'Precondition Failed',
+			413 => 'Request Entity Too Large',
+			414 => 'Request-URI Too Long',
+			415 => 'Unsupported Media Type',
+			416 => 'Requested range unsatisfiable',
+			417 => 'Expectation failed',
+			418 => 'I’m a teapot',
+			422 => 'Unprocessable entity',
+			423 => 'Locked',
+			424 => 'Method failure',
+			425 => 'Unordered Collection',
+			426 => 'Upgrade Required',
+			449 => 'Retry With',
+			450 => 'Blocked by Windows Parental Controls',
+			500 => 'Internal Server Error',
+			501 => 'Not Implemented',
+			502 => 'Bad Gateway ou Proxy Error',
+			503 => 'Service Unavailable',
+			504 => 'Gateway Time-out',
+			505 => 'HTTP Version not supported',
+			507 => 'Insufficient storage',
+			509 => 'Bandwidth Limit Exceeded',
+		);
+
+		if(isset($httpCodes[$this->statusCode]))
+			return $httpCodes[$this->statusCode];
+		else
+			return \Yii::t('yii', 'Error');
+	}
 }
diff --git a/framework/db/Command.php b/framework/db/Command.php
index 3531fa7..f893c8c 100644
--- a/framework/db/Command.php
+++ b/framework/db/Command.php
@@ -253,17 +253,13 @@ class Command extends \yii\base\Component
 	 * Executes the SQL statement.
 	 * This method should only be used for executing non-query SQL statement, such as `INSERT`, `DELETE`, `UPDATE` SQLs.
 	 * No result set will be returned.
-	 * @param array $params input parameters (name=>value) for the SQL execution. This is an alternative
-	 * to [[bindValues()]]. Note that if you pass parameters in this way, any previous call to [[bindParam()]]
-	 * or [[bindValue()]] will be ignored.
 	 * @return integer number of rows affected by the execution.
 	 * @throws Exception execution failed
 	 */
-	public function execute($params = array())
+	public function execute()
 	{
 		$sql = $this->getSql();
 
-		$this->_params = array_merge($this->_params, $params);
 		if ($this->_params === array()) {
 			$paramLog = '';
 		} else {
@@ -282,11 +278,7 @@ class Command extends \yii\base\Component
 			}
 
 			$this->prepare();
-			if ($params === array()) {
-				$this->pdoStatement->execute();
-			} else {
-				$this->pdoStatement->execute($params);
-			}
+			$this->pdoStatement->execute();
 			$n = $this->pdoStatement->rowCount();
 
 			if ($this->db->enableProfiling) {
@@ -309,63 +301,51 @@ class Command extends \yii\base\Component
 	/**
 	 * Executes the SQL statement and returns query result.
 	 * This method is for executing a SQL query that returns result set, such as `SELECT`.
-	 * @param array $params input parameters (name=>value) for the SQL execution. This is an alternative
-	 * to [[bindValues()]]. Note that if you pass parameters in this way, any previous call to [[bindParam()]]
-	 * or [[bindValue()]] will be ignored.
 	 * @return DataReader the reader object for fetching the query result
 	 * @throws Exception execution failed
 	 */
-	public function query($params = array())
+	public function query()
 	{
-		return $this->queryInternal('', $params);
+		return $this->queryInternal('');
 	}
 
 	/**
 	 * Executes the SQL statement and returns ALL rows at once.
-	 * @param array $params input parameters (name=>value) for the SQL execution. This is an alternative
-	 * to [[bindValues()]]. Note that if you pass parameters in this way, any previous call to [[bindParam()]]
-	 * or [[bindValue()]] will be ignored.
 	 * @param mixed $fetchMode the result fetch mode. Please refer to [PHP manual](http://www.php.net/manual/en/function.PDOStatement-setFetchMode.php)
 	 * for valid fetch modes. If this parameter is null, the value set in [[fetchMode]] will be used.
 	 * @return array all rows of the query result. Each array element is an array representing a row of data.
 	 * An empty array is returned if the query results in nothing.
 	 * @throws Exception execution failed
 	 */
-	public function queryAll($params = array(), $fetchMode = null)
+	public function queryAll($fetchMode = null)
 	{
-		return $this->queryInternal('fetchAll', $params, $fetchMode);
+		return $this->queryInternal('fetchAll', $fetchMode);
 	}
 
 	/**
 	 * Executes the SQL statement and returns the first row of the result.
 	 * This method is best used when only the first row of result is needed for a query.
-	 * @param array $params input parameters (name=>value) for the SQL execution. This is an alternative
-	 * to [[bindValues()]]. Note that if you pass parameters in this way, any previous call to [[bindParam()]]
-	 * or [[bindValue()]] will be ignored.
 	 * @param mixed $fetchMode the result fetch mode. Please refer to [PHP manual](http://www.php.net/manual/en/function.PDOStatement-setFetchMode.php)
 	 * for valid fetch modes. If this parameter is null, the value set in [[fetchMode]] will be used.
 	 * @return array|boolean the first row (in terms of an array) of the query result. False is returned if the query
 	 * results in nothing.
 	 * @throws Exception execution failed
 	 */
-	public function queryRow($params = array(), $fetchMode = null)
+	public function queryRow($fetchMode = null)
 	{
-		return $this->queryInternal('fetch', $params, $fetchMode);
+		return $this->queryInternal('fetch', $fetchMode);
 	}
 
 	/**
 	 * Executes the SQL statement and returns the value of the first column in the first row of data.
 	 * This method is best used when only a single value is needed for a query.
-	 * @param array $params input parameters (name=>value) for the SQL execution. This is an alternative
-	 * to [[bindValues()]]. Note that if you pass parameters in this way, any previous call to [[bindParam()]]
-	 * or [[bindValue()]] will be ignored.
 	 * @return string|boolean the value of the first column in the first row of the query result.
 	 * False is returned if there is no value.
 	 * @throws Exception execution failed
 	 */
-	public function queryScalar($params = array())
+	public function queryScalar()
 	{
-		$result = $this->queryInternal('fetchColumn', $params, 0);
+		$result = $this->queryInternal('fetchColumn', 0);
 		if (is_resource($result) && get_resource_type($result) === 'stream') {
 			return stream_get_contents($result);
 		} else {
@@ -377,33 +357,26 @@ class Command extends \yii\base\Component
 	 * Executes the SQL statement and returns the first column of the result.
 	 * This method is best used when only the first column of result (i.e. the first element in each row)
 	 * is needed for a query.
-	 * @param array $params input parameters (name=>value) for the SQL execution. This is an alternative
-	 * to [[bindValues()]]. Note that if you pass parameters in this way, any previous call to [[bindParam()]]
-	 * or [[bindValue()]] will be ignored.
 	 * @return array the first column of the query result. Empty array is returned if the query results in nothing.
 	 * @throws Exception execution failed
 	 */
-	public function queryColumn($params = array())
+	public function queryColumn()
 	{
-		return $this->queryInternal('fetchAll', $params, \PDO::FETCH_COLUMN);
+		return $this->queryInternal('fetchAll', \PDO::FETCH_COLUMN);
 	}
 
 	/**
 	 * Performs the actual DB query of a SQL statement.
 	 * @param string $method method of PDOStatement to be called
-	 * @param array $params input parameters (name=>value) for the SQL execution. This is an alternative
-	 * to [[bindValues()]]. Note that if you pass parameters in this way, any previous call to [[bindParam()]]
-	 * or [[bindValue()]] will be ignored.
 	 * @param mixed $fetchMode the result fetch mode. Please refer to [PHP manual](http://www.php.net/manual/en/function.PDOStatement-setFetchMode.php)
 	 * for valid fetch modes. If this parameter is null, the value set in [[fetchMode]] will be used.
 	 * @return mixed the method execution result
 	 * @throws Exception if the query causes any problem
 	 */
-	private function queryInternal($method, $params, $fetchMode = null)
+	private function queryInternal($method, $fetchMode = null)
 	{
 		$db = $this->db;
 		$sql = $this->getSql();
-		$this->_params = array_merge($this->_params, $params);
 		if ($this->_params === array()) {
 			$paramLog = '';
 		} else {
@@ -431,11 +404,7 @@ class Command extends \yii\base\Component
 			}
 
 			$this->prepare();
-			if ($params === array()) {
-				$this->pdoStatement->execute();
-			} else {
-				$this->pdoStatement->execute($params);
-			}
+			$this->pdoStatement->execute();
 
 			if ($method === '') {
 				$result = new DataReader($this);
diff --git a/framework/db/QueryBuilder.php b/framework/db/QueryBuilder.php
index 35bfcb3..ebca888 100644
--- a/framework/db/QueryBuilder.php
+++ b/framework/db/QueryBuilder.php
@@ -131,11 +131,10 @@ class QueryBuilder extends \yii\base\Object
 	 * @param string $table the table that new rows will be inserted into.
 	 * @param array $columns the column names
 	 * @param array $rows the rows to be batch inserted into the table
-	 * @param array $params the parameters to be bound to the command
 	 * @return string the batch INSERT SQL statement
 	 * @throws NotSupportedException if this is not supported by the underlying DBMS
 	 */
-	public function batchInsert($table, $columns, $rows, $params = array())
+	public function batchInsert($table, $columns, $rows)
 	{
 		throw new NotSupportedException($this->db->getDriverName() . ' does not support batch insert.');
 
diff --git a/tests/unit/framework/db/CommandTest.php b/tests/unit/framework/db/CommandTest.php
index 2a11fcb..d505f6d 100644
--- a/tests/unit/framework/db/CommandTest.php
+++ b/tests/unit/framework/db/CommandTest.php
@@ -189,14 +189,6 @@ class CommandTest extends \yiiunit\MysqlTestCase
 		$command = $db->createCommand($sql);
 		$command->bindValue(':name', 'user5');
 		$this->assertEquals('user5@example.com', $command->queryScalar());
-
-		// bind value via query or execute method
-		$sql = 'INSERT INTO tbl_customer(email, name, address) VALUES (:email, \'user6\', \'address6\')';
-		$command = $db->createCommand($sql);
-		$command->execute(array(':email' => 'user6@example.com'));
-		$sql = 'SELECT email FROM tbl_customer WHERE name=:name';
-		$command = $db->createCommand($sql);
-		$this->assertEquals('user5@example.com', $command->queryScalar(array(':name' => 'user5')));
 	}
 
 	function testFetchMode()