Boolean value in function

Question

Dear All,
I have the function like as follows
Function Test_Bool (id number,name varchar2 ) return boolean as
begin
return true;
end;
for the above function i need to use as follows
select 'X' from dual where Test_Boo(1,'dddd') = 1 ;
but its show the error like invalid identifier
How to do this? just i want to check in where condition like as true
Thanks ...

Answer 1

Hi,
842086 wrote:
Dear All,
I have the function like as follows
Function Test_Bool (id number,name varchar2 ) return boolean as
begin
return true;
end;
for the above function i need to use as follows
select 'X' from dual where Test_Boo(1,'dddd') = 1 ;
but its show the error like invalid identifier
How to do this? just i want to check in where condition like as true
Thanks ...
If you want to say:
where Test_Boo(1,'dddd') = 1
then you want Test_Boo to return a NUMBER, not a BOOLEAN.
If you can't change Test_Boo so that it returns a NUMBER, you can write a wrapper function that does:
CREATE OR REPLACE FUNCTION  test_boo_num
(   in_id    IN  NUMBER
,   in_name  IN  VARCHAR2
RETURN NUMBER
IS
    return_val  NUMBER;
    test_boo_true BOOLEAN  := test_boo (in_id, in_name);
BEGIN
    IF  test_boo_true
    THEN
        return_val := 1;
    ELSIF NOT test_boo_true
    THEN
        return_val := 0;
    END IF;
    RETURN  return_val;
END  test_boo_num;
SHOW ERRORS
You can call the wrapper function from SQL statements like this:
where   Test_Boo_num (1, 'dddd')  = 1
I assume test_boo is actually more complicated than what you posted.  If test_boo never returns UNKNOWN, then the wrapper function can be simplified a little.