Debugging procedure or packages using sql*plus reg

Question

Dear all,
I am new to oracle, can any body provide me some information related to this below issues.
a) suppose i have created a procedure using sql*plus tool then next day i wanted to debug or modify my stored procedure.
Then what could approach using sql*plus
b) same case if we consider for packages then for any specific stored procedure or functions what would be the approach to debug or modify using sql*plus
yours cordination will be highly appreciate
Thanks n regards
Laxman

Answer 1

Using SQL*Plus you can debug your stored pl/sql code only adding some "prints" in your code:
SQL> create or replace procedure test is
  2  begin
  3  dbms_output.put_line('starting...');
  4  --do something here
  5  dbms_output.put_line('done step 1');
  6  --do something else here
  7  dbms_output.put_line('end procedure...');
  8  end;
  9  /
Procedura creata.
SQL> set serverout on
SQL> exec test
starting...
done step 1
end procedure...
Procedura PL/SQL completata correttamente.Or writing logs in a log table:
SQL> create table logtab(ts timestamp(9),mess varchar2(4000));
Tabella creata.
SQL> create or replace procedure test is
  2  begin
  3  insert into logtab values(systimestamp,'starting...');
  4  --do something here
  5  insert into logtab values(systimestamp,'done step 1');
  6  --do something else here
  7  insert into logtab values(systimestamp,'end procedure...');
  8  end;
  9  /
Procedura creata.
SQL> exec test
Procedura PL/SQL completata correttamente.
SQL> col ts for a40
SQL> col mess for a40
SQL> select * from logtab;
TS                                       MESS
25-DIC-09 15:33:13,656000000             starting...
25-DIC-09 15:33:13,656000000             done step 1
25-DIC-09 15:33:13,656000000             end procedure...Max
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