Question

我已经在这个存储过程中被打了2天了。这是代码

BEGIN

DECLARE in_township_id INT DEFAULT 2;
DECLARE in_billing_month INT DEFAULT 1;
DECLARE in_billing_month_string VARCHAR(15) DEFAULT 'January';
DECLARE in_billing_year INT DEFAULT 2016;
DECLARE in_account_id INT DEFAULT 1;
DECLARE out_status INT DEFAULT 0;
DECLARE in_invoice_date DATETIME DEFAULT CURRENT_DATE();

DECLARE _no_flats INT;
DECLARE _current_month_data_exists INT;

DECLARE _flat_id INT;
DECLARE _current_billing_month, _current_billing_year INT;
DECLARE _next_billing_month, _next_billing_year INT;
DECLARE _current_balance, _new_balance FLOAT DEFAULT 0;
DECLARE _maintenance, _power_backup, _service_tax, _penalty FLOAT DEFAULT 0;
DECLARE _maintenance_price, _power_backup_price, _service_tax_price, _balance_price, _penalty_price FLOAT DEFAULT 0;
DECLARE _consumed_units INT;
DECLARE _penal_interest_remark, _maintenance_bill_remark, _power_backup_remark, _service_tax_remark, _maintenance_account_remark  VARCHAR(100);
DECLARE _total_penalty, _total_maintenance, _total_power_backup, _total_service_tax FLOAT DEFAULT 0;

DECLARE _all_flats_cursor CURSOR FOR SELECT id FROM flat_resident_v WHERE township_id=2;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET _no_flats=1;

DECLARE EXIT HANDLER FOR SQLEXCEPTION
BEGIN
    ROLLBACK;
    SET out_status=2;
    SELECT 'An error has occurred, operation rollbacked and the stored procedure was terminated';
END;

START TRANSACTION;

SET _current_billing_month=in_billing_month;
SET _current_billing_year=in_billing_year;
SET _next_billing_month=in_billing_month;
SET _next_billing_year=in_billing_year;
IF in_billing_month=1 THEN
    SET _current_billing_month=12;
    SET _current_billing_year=in_billing_year-1;
END IF;
IF in_billing_month=12 THEN
    SET _next_billing_month=1;
    SET _next_billing_year=in_billing_year+1;
ELSE
    SET _next_billing_month = in_billing_month+1;
END IF;
SELECT CONCAT('On account of billing month ', in_billing_month_string) INTO _maintenance_account_remark;
SELECT penalty, rate_maintenance, rate_power_backup, service_tax_rate 
    INTO _penalty, _maintenance, _power_backup, _service_tax FROM account_master WHERE id=in_account_id;
SELECT CONCAT('Charged @ ', _penalty*1200, '%') INTO _penal_interest_remark;
SELECT CONCAT('Charged @ Rs. ', _maintenance, '/sq. feet') INTO _maintenance_bill_remark;
SELECT CONCAT('Charged @ Rs. ', _power_backup, '/unit') INTO _power_backup_remark;
SELECT CONCAT('Charged @ ', _service_tax_price*100, '%') INTO _service_tax_remark;
SET out_status = 0;
INSERT INTO temp(value1, value2) VALUES('SUCCESS', 'Initialization Completed');

OPEN _all_flats_cursor;
SET _no_flats=0;
ALL_FLATS_LOOP: LOOP
    FETCH _all_flats_cursor INTO _flat_id;
    IF _no_flats=1 THEN
        INSERT INTO temp(value1, value2) VALUES('LOOP BREAK', _no_flats);
        LEAVE ALL_FLATS_LOOP;
    END IF;
    IF _no_flats=0 THEN
        INSERT INTO temp(value1, value2) VALUES('INSIDE LOOP', _no_flats);
        INSERT INTO temp(value1, value2) VALUES('FLAT_ID', _flat_id);
        SELECT count(FLATS.id) INTO _current_month_data_exists FROM account_flat_ledger as FLATS 
            WHERE FLATS.flat_id=_flat_id AND FLATS.debit_month=in_billing_month 
                AND FLATS.debit_year=in_billing_year FOR UPDATE;
        IF _current_month_data_exists=0 THEN
            SET out_status = 1;
            INSERT INTO temp(value1, value2) VALUES('_current_month_data_exists', 'FAILED: Data not exists for billing year');
            LEAVE ALL_FLATS_LOOP;
        END IF;

        SELECT consumed_units INTO _consumed_units FROM account_power_backup_usage 
            WHERE flat_id=_flat_id AND month=in_billing_month AND year=in_billing_year;

        INSERT INTO temp(value1, value2) VALUES('SUCCESS', 'Power Ok'); 
        SELECT balance INTO _current_balance FROM account_flat_ledger as FLATS 
            WHERE FLATS.flat_id=_flat_id AND FLATS.debit_month=_current_billing_month AND FLATS.debit_year=_current_billing_year FOR UPDATE;
        IF _current_balance>0 THEN
            SET _penalty_price = _penalty*_current_balance;
        END IF;
        SET _maintenance_price = _maintenance*1000;
        SET _power_backup_price = _power_backup*_consumed_units;
        SET _service_tax_price = _service_tax * (_maintenance+_power_backup);
        SET _new_balance = _current_balance + _penalty + _maintenance + _power_backup + _service_tax;

        INSERT INTO temp(value1, value2) VALUES('SUCCESS', 'All Values Set');

        UPDATE account_flat_ledger SET penal_interest=_penalty_price, maintenance_bill=_maintenance_price, service_tax=_service_tax_price,
            power_backup=_power_backup_price, opening_balance=_current_balance,received_amount=0, balance=_new_balance,
            debit_date=CURDATE(), penal_interest_remark=_penal_interest_remark, maintenance_bill_remark=_maintenance_bill_remark,
            power_backup_remark=_power_backup_remark, service_tax_remark=_service_tax_remark 
            WHERE flat_id=_flat_id AND debit_month=in_billing_month AND debit_year=in_billing_year;

        INSERT INTO account_flat_ledger(flat_id, debit_month, debit_year) 
            VALUES(_flat_id, _next_billing_month, _next_billing_year);

        INSERT INTO temp(value1, value2) VALUES('SUCCESS', 'Insertion of new Flats OK');

        SET _total_maintenance = _total_maintenance + (_maintenance_price 
            + _power_backup_price + _service_tax_price + _penalty_price);
        SET _total_penalty = _total_penalty + _penalty_price;
        SET _total_power_backup = _total_power_backup + _power_backup_price;
        SET _total_service_tax = _total_service_tax + _service_tax_price;

        INSERT INTO temp(value1, value2) VALUES('SUCCESS', 'Flat over');
    END IF;
END LOOP ;
CLOSE _all_flats_cursor;

IF out_status != 0 THEN 
    ROLLBACK;
END IF;

SELECT @out_status;
END IF;


COMMIT;
END

以前我使用Java代码（使用ResultSets和PreparedStatements）完成了这一切。但是有人告诉我为了这个目的使用存储过程来使事情变得方便和有效。

问题：循环，即Cursor只执行一次，但表中有3条记录。我使用登录临时表来追踪错误，但无法找到。

mysql存储过程中的游标只执行1次迭代

0 个答案: