No data found despite data in the table

Question

hello All,
I have a problen with a function. I get "no data found" exception despite the rows in the table exist. the code is pasted below
create or replace
FUNCTION GET_POT_NAME
RELATED_TYPE IN VARCHAR2,
PARENTID IN NUMBER
RETURN VARCHAR2 IS
POTNAME VARCHAR2(100);
sqlst VARCHAR2(100);
BEGIN
IF PARENTID > 0 then
SELECT POTENTIALNAME INTO POTNAME FROM CRM_POTENTIAL WHERE potentialid = PARENTID;
Else
POTNAME:='';
END IF;
RETURN POTNAME;
I have verified that the data exists in the table for a paretid 322. However I get the exception when the function is called with 322. I fire a select statement in the SQL developer query window and get the row displayed. This is happening with few of the tables and the function work ok on some other tables.
Please help.

Answer 1

908776 wrote:
please note that same code works on some table and not on some.Any chance tables where it doesn't work have column PARENTID? If so, column name is SQL statement always takes precedence over variable name and condition:
potentialid = PARENTIDwill compare column potentialid to column PARENTID. It is always a good idea to prefix PL/SQL variable. E.G. P_PARENTID (P for parameter, since it is SP parameter) or v_POTNAME (V for variable).
SY.