function initQuery($params)
{
$tables = Extension_Manager::getTables();
$excolumns = $tables['marketplace_ext_data']['columns'];
//$this->addSelectTable('marketplace_ext_data');
$this->addSelectField($excolumns['id']);
$this->addSelectField($excolumns['display_name']);
$this->addSelectField($excolumns['name']);
$this->addSelectField($excolumns['desc']);
$this->addSelectField($excolumns['link']);
$this->addSelectField($excolumns['price']);
$this->addSelectField($excolumns['image']);
$this->addSelectField($excolumns['category']);
$this->addSelectField($excolumns['type']);
$this->addSelectField($excolumns['latestversion']);
$this->addSelectField($excolumns['latestcompatibleversion']);
$this->addSelectField($excolumns['file']);
}
function uninstall()
{
$query = new DB_Table_Delete(Extension_Manager::getTables());
global $application;
$application->db->getDB_Result($query);
}