topic_type change type on varchar about livestreet HOT 4 CLOSED

public function Activate() { 
    if (!$this->isTableExists('prefix_qa_question')) { 
        $this->addEnumType('prefix_comment','target_type','question');
        $this->addEnumType('prefix_comment_online','target_type','question');
        $this->addEnumType('prefix_vote','target_type','question');
        $this->addEnumType('prefix_favourite','target_type','question');
        $this->ExportSQL(dirname(__FILE__).'/install.sql'); // Если нам надо изменить БД, делаем это здесь.
    }
    return true;
}