protected function getContentDbFieldsStmt(array $fields)
    {
        $query = $this->databaseHandler->createSelectQuery();
        $query->select($fields)
            ->from($this->databaseHandler->quoteTable(self::CONTENTOBJECT_TABLE))
            ->where($query->expr->eq('status', ContentInfo::STATUS_PUBLISHED));
        $stmt = $query->prepare();
        $stmt->execute();

        return $stmt;
    }