Statement ignored

Question

I am getting following error when i call function thru SQL.
SELECT F1(100) FROM DUAL
ERROR at line 1:
ORA-06552: PL/SQL: Statement ignored
ORA-06553: PLS-382: expression is of wrong type
My function is
CREATE OR REPLACE FUNCTION F1(N NUMBER) RETURN BOOLEAN
IS
BEGIN
IF N > 100 THEN
RETURN TRUE;
ELSE
RETURN FALSE;
END IF;
END;
/

Answer 1

In addition to the explanation of ushitaki
Oracle says
PLS-00382: expression is of wrong type
Cause: An expression has the wrong datatype for the context in which it was found.
Action: Change the datatype of the expression. You might want to use datatype conversion functions.
I think there is datatype issue. I started researching on this and found that, boolean value cannot be printed in pl/sql as well.
1 create or replace procedure ss
2 as
3 b boolean;
4 begin
5 b:=true;
6 dbms_output.put_line(b);
7* end;
SQL> /
Warning: Procedure created with compilation errors.
SQL> show err
Errors for PROCEDURE SS:
LINE/COL ERROR
6/1 PLS-00306: wrong number or types of arguments in call to
'PUT_LINE'
6/1 PL/SQL: Statement ignored
SQL> ed
Wrote file afiedt.buf
1 create or replace procedure ss
2 as
3 b boolean;
4 begin
5 b:=true;
6 if (b=true) then
7 dbms_output.put_line('true');
8 end if;
9* end;
10 /
Procedure created.
SQL> execute ss;
true
PL/SQL procedure successfully completed.
SQL>
Hope this helps.