Oracle PLSQL function call into a second function

Question

How can I call the return value of the first function into the second function? Here is the first function to count the number of visits a customer makes to my shop:

CREATE OR REPLACE  FUNCTION CALCULATE ( NUM CUSTOMER.CUST_VISIT%TYPE)
RETURN NUMBER
IS
V_CUST_VISIT NUMBER(3);
V_COUNT INTEGER;
BEGIN
SELECT CUST_VISIT
INTO V_CUST_VISIT
FROM CUSTOMER, BOOKING
WHERE CUSTOMER.CUST_ID = BOOKING.CUST_ID;
SELECT MAX(COUNT(*)) 
INTO v_count
FROM BOOKING
GROUP BY CUST_ID
HAVING count(*)>=0;

CASE v_count
WHEN 3 THEN v_cust_visit:= v_count; 
DBMS_OUTPUT.PUT_LINE('10% DISCOUNT DUE');

WHEN 6 THEN v_cust_visit:= v_count;
DBMS_OUTPUT.PUT_LINE('20% DISCOUNT DUE');

WHEN 9 THEN v_cust_visit:= v_count;
DBMS_OUTPUT.PUT_LINE('30% DISCOUNT DUE');

ELSE v_cust_visit:= v_count;
DBMS_OUTPUT.PUT_LINE('OOPS NO DISCOUNT DUE YET! AFTER THREE BOOKINGS');
END CASE;
END;
/
Where in the second function:
CREATE OR REPLACE FUNCTION CALC_BILL
(BILL_NUM TREATMENT.TREAT_COST%TYPE)

RETURN NUMBER

IS

CUST_ID VARCHAR2(4);
TREAT_COST NUMBER(10,2);
v_TREAT_cost TREATMENT.TREAT_COST%TYPE; 
DISCOUNTED_BILL NUMBER(10,2);
NO_DISCOUNT EXCEPTION;

BEGIN

SELECT TREAT_COST 
INTO v_treat_cost 

FROM CUSTOMER C, TREATMENT T, TREAT_SESSION TS
WHERE C.CUST_ID = TS.CUST_ID 
AND T.TREAT_ID = TS.TREAT_ID;

IF CALCULATE() :=3 --this is how I tried and it hasnt work-- THEN DISCOUNTED_BILL:= v_treat_cost-(v_treat_cost*0.1);

ELSIF CALCULATE := 6 THEN DISCOUNTED_BILL := v_treat_cost-(v_treat_cost*0.2);

ELSIF CALCULATE := 9 THEN DISCOUNTED_BILL := v_treat_cost-(v_treat_cost*0.3); ELSE RAISE NO_DISCOUNT;

 END IF;
 END;
 /

Shouldn't you use CALL_BILL in your CALCULATE?

bonCodigo
– bonCodigo

2012-11-25 11:43:28 +00:00
Commented Nov 25, 2012 at 11:43 — bonCodigo
– bonCodigo, Commented Nov 25, 2012 at 11:43

Greg Smith · Accepted Answer · 2012-11-25 11:35:10Z

1

Assign the function call to a variable:

    some_number_result := calculate(some_input);

    if some_number_result = 1 then 
       -- do stuff
    end if;

etc...

answered Nov 25, 2012 at 11:35

Greg Smith

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1 Comment

Fatihulkhair Abdulsamad Over a year ago

thanks Greg, this is what I did for now it looks good v_CUST_VISIT := CALCULATE(DISCOUNTED_BILL); IF v_CUST_VISIT = 3 THEN DISCOUNTED_BILL:= v_treat_cost-(v_treat_cost*0.1); End IF;

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