private function getAdditionalTableFields()
    {
        $type  = $this->eavConfig->getEntityType(\Magento\Catalog\Model\Product::ENTITY);
        $table = $type->getAdditionalAttributeTable();
        $fullTableName = $this->getResource()->getTable($table);
        $tableDesc = $this->getConnection()->describeTable($fullTableName);
        $tableFields = array_keys($tableDesc);

        return array_diff($tableFields, $this->overridenColumns);
    }