protected function getStatements()
    {

        // return the array with the SQL statements that has to be prepared
        return array(
            SqlStatementKeys::DELETE_CATEGORY_PRODUCT        => $this->loadStatement(SqlStatementKeys::DELETE_CATEGORY_PRODUCT),
            SqlStatementKeys::DELETE_CATEGORY_PRODUCT_BY_SKU => $this->loadStatement(SqlStatementKeys::DELETE_CATEGORY_PRODUCT_BY_SKU)
        );
    }