mysql中奇怪行为的存储过程

Question

该存储过程正在处理物料预留。基本的想法是，它检查这些材料已经被雇佣了多少，如果还有材料库存，我会插入一个新的订单。如果此预订ID已为此材料预留，我正在更新金额。

也许我做错了什么，但当我尝试添加一个新的预订它的作品。更新从不起作用，并且当已经有特定物料ID的预留时，它不可能与另一个预留ID一起租用。

我给你举个例子：

CALL aantal_besch_mat_van_tot('2007-03-13','2007-03-14',15,6,50,'procedure test lol'); 

好了，所以这个工作，但是当我再次执行金额50应该去50 +以前那么它应该是100次它从来没有更新。

此外，当你将雇佣与另一个预订ID相同的材料它不起作用。 示例：

CALL aantal_besch_mat_van_tot('2007-03-13','2007-03-14',15,7,50,'Im hiring this material'); 

这也行不通。

我已经打印出al值，并且在那里得到了正确的金额。

在这里，你可以找到我的存储过程的代码：

DELIMITER $$ 
CREATE DEFINER=`root`@`localhost` PROCEDURE `fabiola`.`aantal_besch_mat_van_tot`(IN `p_datum_van` date,IN `p_datum_tot` date,IN `p_mat_id` int, IN `p_res_id` int, IN `p_nodig` int, IN `p_mat_opmerking` VARCHAR(255)) 

BEGIN 
    DECLARE aantal INT DEFAULT 0; 
    DECLARE tot INT DEFAULT 0; 
    DECLARE upda INT DEFAULT 0; 
    DECLARE nieuwa INT DEFAULT 0; 
    DECLARE voriga INT DEFAULT 0; 
    DECLARE test INT DEFAULT 0; 
    DECLARE res_van datetime; 
    DECLARE res_tot datetime; 

    -- Overeenkomstige data selecteren 
    SELECT r.incheckdatum, r.uitcheckdatum FROM reservaties r 
    WHERE r.id = p_res_id 
    INTO res_van, res_tot; 

     SELECT mpr.aantal FROM materialen_per_reservatie mpr 
     WHERE mpr.materialen_id = p_mat_id AND 
      (
      (p_datum_van >= mpr.datum_van AND p_datum_tot <= mpr.datum_tot) -- overlap: binnen 
      OR (p_datum_van <= mpr.datum_van AND p_datum_tot >= mpr.datum_van) -- overlap: voor+in 
      OR (p_datum_van <= mpr.datum_tot AND p_datum_tot >= mpr.datum_tot) -- overlap: na+in 
      OR (p_datum_van <= mpr.datum_van AND p_datum_tot >= mpr.datum_tot) -- overlap:omsluitend 
      ) 
     INTO aantal; 

     -- The total amount of materials 
     SELECT m.aantal_beschikbaar FROM materialen m 
     WHERE m.id = p_mat_id 
     INTO tot; 
     -- The test variable is holding the amount of materials that's still available 
     SELECT tot-aantal INTO test; 
     -- Checking if im not ordering more then there is available 
     IF p_nodig < test THEN 
      -- Checking if this material is already hired from this reservation id 
      SELECT mpra.id, mpra.aantal FROM materialen_per_reservatie mpra 
      WHERE (mpra.reservaties_id = p_res_id 
      AND mpra.materialen_id = p_mat_id) INTO upda, voriga; 
      -- if voriga is bigger then zero it means that there is already an reservatie for this material for this reservation so im not inserting but updating 
      IF voriga > 0 THEN 
       -- Selecting the previous amount and add it with the p_nodig amount 
       SELECT voriga+p_nodig INTO nieuwa; 
       UPDATE materialen_per_reservatie SET materialen_per_reservatie.aantal = nieuwa WHERE reservaties_id = p_res_id AND materialen_id = p_mat_id; 
      ELSE 
       -- There is no reservation for this material with this reservation id so i my insert a new row 
       INSERT INTO materialen_per_reservatie(reservaties_id, materialen_id, aantal, effectief_gebruikt, opmerking, datum_van, datum_tot) VALUES (p_res_id, p_mat_id, p_nodig, p_nodig, p_mat_opmerking, p_datum_van, p_datum_tot); 
      END IF; 
     END IF; 
END$$ 

我测试了两个INSERT/UPDATE查询的独立和他们的工作。

Answer 1

你的日期值附近的引号在哪里？

试试这个：

call aantal_besch_mat_van_tot('2007-03-13', '2007-03-14', 15, 6, 50, 'Im hiring this material'); 

注日期是像'2007-03-13'，不2007-03-13，这实际上是数1991（即2007 - 3 - 13 = 1991）