Question

I’m just wondering why this piece of code is not working. I don’t have any supplier id=1 in my table.

DECLARE
    VAR SUPP_NM VARCHAR(100);
    VAR_SUPP_ID  NUMBER := 1;
    WHILE_VAR CHAR := 'Y';
BEGIN
    SELECT SUPP_NM
    INTO VAR_SUPP_NM
    FROM TEST.SUPPLIER
    WHERE SUPP_ID = VAR_SUPP_ID;
        
    IF SQL%NOTFOUND THEN
        DBMS_OUTPUT.PUT_LINE('SQL DATA NOT FOUND');
    ELSIF SQL%FOUND THEN
        DBMS_OUTPUT.PUT_LINE('DATA FOUND');
    END IF;    
END;

I get a 01403 error in Toad but not handled as sql%notfound.

Why isn’t the sql%notfound working?

Answer 1

To catch the NO_DATA_FOUND exception rewrite your code as follows by adding exception section:

DECLARE
    VAR_SUPP_NM VARCHAR2(100);
    VAR_SUPP_ID  NUMBER := 1;
    WHILE_VAR CHAR := 'Y';
BEGIN
  SELECT SUPP_NM
    INTO VAR_SUPP_NM
    FROM TEST.SUPPLIER
   WHERE SUPP_ID = VAR_SUPP_ID;

 DBMS_OUTPUT.PUT_LINE('DATA FOUND');

exception
  when no_data_found 
  then DBMS_OUTPUT.PUT_LINE('SQL DATA NOT FOUND');

END;

Checking SQL%FOUND or SQL%NOTFOUND have no meaning in the case of select into statement, because if the select statement returns no rows it will always raise no_data_found exception, except, if that select statement invokes aggregate function, it will always return data or null if no rows has been selected.

Do not use varchar datatype, use varchar2 datatype instead.