Illuminate\Database\Connection::setFetchMode PHP Method

    public function setFetchMode($fetchMode, $fetchArgument = null, array $fetchConstructorArgument = [])
    {
        $this->fetchMode = $fetchMode;
        $this->fetchArgument = $fetchArgument;
        $this->fetchConstructorArgument = $fetchConstructorArgument;
    }

 /**
  * Prepare the database connection instance.
  *
  * @param  \Illuminate\Database\Connection  $connection
  * @return \Illuminate\Database\Connection
  */
 protected function prepare(Connection $connection)
 {
     $connection->setFetchMode($this->app['config']['database.fetch']);
     if ($this->app->bound('events')) {
         $connection->setEventDispatcher($this->app['events']);
     }
     // The database connection can also utilize a cache manager instance when cache
     // functionality is used on queries, which provides an expressive interface
     // to caching both fluent queries and Eloquent queries that are executed.
     $app = $this->app;
     $connection->setCacheManager(function () use($app) {
         return $app['cache'];
     });
     // We will setup a Closure to resolve the paginator instance on the connection
     // since the Paginator isn't used on every request and needs quite a few of
     // our dependencies. It'll be more efficient to lazily resolve instances.
     $connection->setPaginator(function () use($app) {
         return $app['paginator'];
     });
     // Here we'll set a reconnector callback. This reconnector can be any callable
     // so we will set a Closure to reconnect from this manager with the name of
     // the connection, which will allow us to reconnect from the connections.
     $connection->setReconnector(function ($connection) {
         $this->reconnect($connection->getName());
     });
     return $connection;
 }