Pass Boolean into a Function

Question

Currently, My function is :
FUNCTION BooleanToVarChar2(p_Boolean_i Boolean)
RETURN VARCHAR2 IS
BEGIN
IF p_Boolean_i THEN
RETURN 'TRUE';
ELSE
RETURN 'FALSE';
END IF;
END;
But I face an error whenever I try to call this function. The error message is
The following error has occurred:
ORA-06550: line 5, column 36:
PLS-00382: expression is of wrong type
ORA-06550: line 5, column 18:
PLS-00306: wrong number or types of arguments in call to 'BOOLEANTOVARCHAR2'
declare
temp boolean;
begin
temp := true;
select BooleanToVarChar2(Temp) from dual;
end;
Any Suggestion? Help!
Message was edited by:
iMe

Answer 1

SQL does not support booleans, so you cannot use them in straight SQL. you can use them in pl/sql. so:
declare
answer varchar2(100);
begin
answer := BooleanToVarChar2( TRUE );
end;
also, using a select without an INTO clause in pl/sql seems rather pointless. so if the above example doesn't meet your requirements, try to give a more meaningful example