Warning message in 10g related to timestamp

Question

select * from v$version;
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bi
PL/SQL Release 10.2.0.1.0 - Production
create table jtime(jtime timestamp with time zone);
create or replace procedure jtimePro as
begin
insert into jtime values(systimestamp);
end jtimePro;
Assuming I compile it via SQL Developer I get a message of
Warning(3,28): PLW-07202: bind type would result in conversion away from column type
I did check the return type on systimestamp it is a timestamp with time zone.
I also different column type of just timestamp with the same warning message. Any ideas how to use a timestamp or timestamp with time zone datatype and not get a warning message?
Also how do I see the warning messages in sql+ there is no 'show warnings'
Thanks

Answer 1

SQL> alter session set PLSQL_WARNINGS = 'enable:ALL' ;
Session altered.
SQL> create table jtime(jtime timestamp with time zone);
Table created.
SQL> create or replace procedure jtimePro as
  2  begin
  3  insert into jtime values(systimestamp);
  4  end jtimePro;
  5  /
SP2-0804: Procedure created with compilation warnings
SQL> show errors
Errors for PROCEDURE JTIMEPRO:
LINE/COL ERROR
3/26     PLW-07202: bind type would result in conversion away from column
         type
SQL> create or replace procedure jtimePro as
  2      dt_tz timestamp with time zone ;
  3  begin
  4      dt_tz := systimestamp ;
  5  insert into jtime values(dt_tz);
  6  end jtimePro;
  7  /
Procedure created.
SQL> show errors
No errors.
SQL>