Question

这是我的功能比较：

DROP FUNCTION IF EXISTS compra(customers.customerid%TYPE, prods integer ARRAY,orderlines.quantity%TYPE) CASCADE;
CREATE OR REPLACE FUNCTION compra(c_id customers.customerid%TYPE,prods integer ARRAY, quant integer ARRAY)
    RETURNS void AS $$

    DECLARE
        t_price products.price%TYPE:= 0;
        p_price products.price%TYPE;
        tax_c CONSTANT numeric:=0.23;

        ord_id orders.orderid%TYPE;
        ord_date orders.orderdate%TYPE:= current_date;
        counter INT:= array_length(prods, 1);
        init INT:= 1;
    BEGIN

        SELECT MAX(ord.orderid) INTO ord_id
        FROM orders AS ord;

        ord_id:= ord_id + 1;

        INSERT INTO orders(orderid,orderdate,customerid, netamount, tax, totalamount) values(ord_id, ord_date, c_id, 0, tax_c, 0);


        WHILE init <= counter 
        LOOP

            INSERT INTO orderlines(orderlineid, orderid, prod_id, quantity, orderdate) 
            VALUES(init,ord_id, prods[init], quant[init], ord_date);

            INSERT INTO cust_hist(customerid, orderid, prod_id) 
            VALUES(c_id, ord_id, prods[init]);


            SELECT price INTO p_price
            FROM products 
            WHERE prod_id=prods[init];

            t_price:=p_price*quant[init];

            UPDATE orders SET 
            netamount=netamount + t_price,
            totalamount =totalamount + t_price+(t_price * tax_c)
            WHERE orderid = ord_id;

            UPDATE inventory SET 
            quan_in_stock = quan_in_stock - quant[init], 
            sales = sales + quant[init]
            WHERE prod_id =prods[init];



            if (quant[init] > 0) then

                PERFORM top_5();


            end if;
            init:=init+1;                          


        END LOOP;


    END;
$$ LANGUAGE plpgsql;

我的函数top_5：

DROP FUNCTION IF EXISTS top_5(customers.customerid%TYPE, products.prod_id%TYPE, orderlines.quantity%TYPE) CASCADE;
CREATE OR REPLACE FUNCTION top_5(c_id customers.customerid%TYPE, p_id products.prod_id%TYPE, quant orderlines.quantity%TYPE)
RETURNS void AS $$

DECLARE

ord_id orders.orderid%TYPE;
ord_date orders.orderdate%TYPE:= current_date;
ordln_id orderlines.orderlineid%TYPE:=1;
top_prod_id products.prod_id%TYPE;

top_prod CURSOR IS 

    SELECT inv.prod_id *
    FROM inventory AS inv, products AS prod 
    WHERE inv.prod_id=prod.prod_id
    ORDER BY inv.quan_in_stock desc, inv.sales
    limit 5;

BEGIN

    SELECT nova_orderid() INTO ord_id;

    INSERT INTO orders(orderid, orderdate,customerid,netamount,tax,totalamount) VALUES(ord_id,ord_date,c_id,0,0.23,0);

    PERFORM compra(c_id, p_id, quant, ord_id, ordln_id, ord_date);

OPEN top_prod;

    LOOP

        FETCH top_prod INTO top_prod_id;

        IF (p_id = top_prod_id) THEN 

          UPDATE orders 
          SET netamount = netamount-(netamount*0.2)
          WHERE ord_id = (SELECT MAX(ord_id) FROM orders);


          UPDATE orders 
          SET totalamount = netamount+(netamount*tax)
          WHERE ord_id = (SELECT MAX(ord_id) FROM orders);
          ELSE EXIT;

        END IF;

    END LOOP;

CLOSE top_prod;

END;
$$ LANGUAGE plpgsql;

错误：

错误：函数top_5（）不存在第1行：SELECT top_5（） ^ 提示：没有函数匹配给定的名称和参数类型。您可能需要添加显式类型转换。

我想在我买东西时对最库存的前5种产品打折

我有一个函数top_5，但是当我尝试在函数compra中执行它时，只会给我这个错误

0 个答案: