User-defined function with IN VARCHAR parameter in PL/SQL Oracle [closed] - sql

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Closed 9 years ago.
I need some help. It is the first time when I am asking for help here, so please excuse me for my bad english. I am so mad, because I can not figure out how to fix this error. I work in Oracle 10g. The output is:
Function created.
No errors.
Function created.
Enter value for v_numes: 'SECTIA1' --SECTIA1 is the name of section(department) from sectii table
Sectia exista in baza de date SECTIA1
Numele sectiei este: SECTIA1 --the name of the department(v_numes)
DECLARE
*
ERROR at line 1:
ORA-06502: PL/SQL: numeric or value error: character to number conversion error
ORA-06512: at "SYSTEM.FUNCTION0", line18
ORA-01403: no data found
ORA-06512: at line 17
Here it is my code:
set serveroutput on
set verify off
CREATE OR REPLACE FUNCTION function0(p_section_name VARCHAR) RETURN NUMBER IS
v_procent1 CONSTANT REAL:=0.01;
v_cods sectii.cods%TYPE;--the table is named sectii, which means sections
v_ok1 NUMBER:=1;
BEGIN
DBMS_OUTPUT.PUT_LINE('Numele sectiei este: '||p_section_name);
SELECT cods
INTO v_cods
FROM sectii
WHERE den=UPPER(p_section_name);
DBMS_OUTPUT.PUT_LINE('Codul sectiei pentru '||p_section_name||' este '||v_cods);
RETURN (v_ok1);
EXCEPTION
WHEN TOO_MANY_ROWS THEN
RETURN 'Prea multe sectii cu acest nume.';
WHEN NO_DATA_FOUND THEN
RETURN 'Nici o sectie cu acest nume.';
WHEN OTHERS THEN
RAISE_APPLICATION_ERROR(-20011,'Unknown Exception in function0');
END function0;
/
show errors;
/
DECLARE
v_numes VARCHAR2(255);
v_numesu VARCHAR2(255);
v_numesl VARCHAR2(255);
v_boool NUMBER:=1;
e_invalid_section EXCEPTION;
BEGIN
v_numes:=&v_numes;
IF SQL%NOTFOUND THEN
RAISE e_invalid_section;
ELSE
DBMS_OUTPUT.PUT_LINE('Sectia exista in baza de date '|| v_numes);
END IF;
v_numesu:=UPPER(v_numes);
v_numesl:=LOWER(v_numes);
IF v_numes=v_numesl OR v_numes=v_numesu THEN
DBMS_OUTPUT.PUT_LINE('FUNCTION0 '||function0(v_numes));
END IF;
--v_numes:=TO_CHAR(v_numes);
--DBMS_OUTPUT.PUT_LINE('RETURN FUNCTIE0: '||v_boool);
EXCEPTION
WHEN e_invalid_section THEN --exceptie definita de utilizator
DBMS_OUTPUT.PUT_LINE('Nu exista aceasta sectie in tabelul sectii.');
END;
/

Answer 1

The declaration of FUNCTION0, states that the function returns a number:
CREATE OR REPLACE FUNCTION function0(p_section_name VARCHAR) RETURN NUMBER IS
The return statements in your exception blocks return characters...
EXCEPTION
WHEN TOO_MANY_ROWS THEN
RETURN 'Prea multe sectii cu acest nume.';
WHEN NO_DATA_FOUND THEN
RETURN 'Nici o sectie cu acest nume.';
One thing to note, your error was extremely specific:
ERROR at line 1:
ORA-06502: PL/SQL: numeric or value error: character to number conversion error
ORA-06512: at "SYSTEM.FUNCTION0", line18
ORA-01403: no data found
ORA-06512: at line 17
This means you're converting a character to a number at line 18 and a NO_DATA_FOUND exception was raised at line 17...
To answer all of your comments in one place, you're getting a NO_DATA_FOUND exception because of the WHERE clause, as I've already said.
WHERE den = UPPER(p_section_name)
Run this SELECT statement:
select * from cods where den = upper(den)
It will not return any rows because it is not true. If you're uppercasing the parameter p_section_name you also need to uppercase the column den. You need to search case-insensitively, see Case insensitive searching in Oracle for more details.