Joomla 3.4 Component with Postgres db connection

i'm developing a joomla component to read some data from a postgres database. Joomla is installed on mysql. In the model i have

protected function getListQuery()
{
    $option = array();                    //prevent problems
    $option['driver']   = 'postgresql';   // Database driver name
    $option['host']     = '192.168.1.0';  // Database host name:port number
    $option['port']     = '1111';
    $option['user']     = 'user';         // User for database authentication
    $option['password'] = 'password';     // Password for database authentication
    $option['database'] = 'PGDB';         // Database name
    $option['prefix']   = '';             // Database prefix (may be empty)

    $dbstock = JDatabaseDriver::getInstance( $option );

    $query = $dbstock->getQuery(true);  
    $query->select('*')->from($dbstock->quoteName('myTable'));

    return $query;
}

I get errors from the view becouse it seems that the dabase server doesn't like quotes in the table name:

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near "myTable" LIMIT 20' at line 2 SQL=SELECT * FROM "myTable" LIMIT 20

What can I do?

EDIT

why the hell this works??

<?php


// No direct access to this file
defined('_JEXEC') or die('Restricted access');

class SLCatalogModelProducts extends JModelList
{
public function __construct($config = array())
 {
    parent::__construct($config);

    $option = array(); //prevent problems

    $option['driver']   = 'postgresql';            // Database driver name
            $option['host']     = '192.168.1.1';    // Database host name:port number
            $option['user']     = 'user';       // User for database authentication
            $option['password'] = 'password';   // Password for database authentication
            $option['database'] = 'PGSQL';      // Database name
            $option['prefix']   = '';    

    $db = JDatabaseDriver::getInstance( $option );
    parent::setDbo($db);
 }
/**
 * Method to build an SQL query to load the list data.
 *
 * @return      string  An SQL query
 */
protected function getListQuery()
{

            $option = array();                       //prevent problems
            $option['driver']   = 'postgresql';      // Database driver name
            $option['host']     = '192.168.1.1';    // Database host name:port number
            $option['user']     = 'user';      // User for database authentication
            $option['password'] = 'password';      // Password for database authentication
            $option['database'] = 'PGSQL';        // Database name
            $option['prefix']   = '';                // Database prefix (may be empty)

            $dbstock = JDatabaseDriver::getInstance($option);
    $query = $dbstock->getQuery(true);  
            $query->select('*')
            ->from('myTable');
    return $query;  
}
}

Really don't like this code...but it works :-(