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DELIMITER //

CREATE PROCEDURE books_issue_register()
BEGIN
    DECLARE v_issueid INTEGER;
    DECLARE v_doi DATE;
    DECLARE v_exp_dor DATE;
    DECLARE v_memberid INTEGER;
    DECLARE flag INTEGER DEFAULT 0;

    -- Declare the cursor to select the required data from the book_issue table
    DECLARE cur CURSOR FOR 
        SELECT issue_id, date_of_issue, expected_date_of_return, mem_id 
        FROM book_issue;

    -- Declare the handler for when no more rows are found
    DECLARE CONTINUE HANDLER FOR NOT FOUND 
        SET flag = 1;

    -- Open the cursor
    OPEN cur;

    -- Loop to fetch data from the cursor
    get_list: LOOP
        FETCH cur INTO v_issueid, v_doi, v_exp_dor, v_memberid;
        
        -- Exit the loop when no more rows are available
        IF flag = 1 THEN 
            LEAVE get_list;
        END IF;

        -- Display the fetched data as a formatted string
        SELECT CONCAT(v_issueid, ':', v_doi, ':', v_exp_dor, ':', v_memberid) AS register;
    END LOOP get_list;

    -- Close the cursor after the loop
    CLOSE cur;
END //

DELIMITER ;