Passing Relational operator along with input

Question

Hi friends
I have a procedure
get_emp_list(p_sal in varchar2
p_out out sys_refcursor)
as
begin
open p_out
for
select * from emp
where sal (=,<,>) p_sal;
end;
Friends pls help me in writing the query,
The input will be like <1000 or >1000 or =1000.
Relational operator will be passed as a input in p_sal
I have to take the output based on the input values.
Pls give me any tips
Rajesh

Answer 1

or more accurately as per your requirements...
procedure get_emp_list(p_sal in varchar2, p_out out sys_refcursor) as
begin
  open p_out for
    select * from emp
    where (substr(p_sal,1,1) = '=' and sal = to_number(substr(p_sal,2)))
    or    (substr(p_sal,1,1) = '<' and sal < to_number(substr(p_sal,2)))
    or    (substr(p_sal,1,1) = '>' and sal > to_number(substr(p_sal,2)));
end;However this assumes the operator will only be a single character so you'll have to alter accordingly if you want to deal with <=, >= etc.