Limit to how much characters we can concatenate?

Question

HI is there a limit to how much characters we can concatenate using concatenation operator in Pl/SQL?
i have following piece of code
FETCH mm_comp_cursor INTO mm_comp_rec;
                    WHILE(mm_comp_cursor%FOUND)
                    LOOP 
                    lv_count:=length(lv_sql1);
                             lv_sql1:=lv_sql1||' UNION ';                        
                            lv_sql1:=lv_sql1||' SELECT company_id FROM company WHERE active_status_id=''A'' CONNECT BY PRIOR company_id=parent_company_id START WITH company_id='
                                     ||mm_comp_rec.tc_id;
                    FETCH mm_comp_cursor INTO mm_comp_rec;
                   END LOOP;               the variablelv_sql becomes undeclared after lv_count crosses 1000 .
is there a way to overcome this?
please help.
Thanks
Glen.

Answer 1

please post your code..
SQL> ed
Wrote file afiedt.buf
  1  declare
  2   str varchar2(32000);
  3  begin
  4   loop
  5    str := str||'x';
  6    if length(str) >= 31999 then
  7     dbms_output.put_line(length(str));
  8     exit;
  9    end if;
10   end loop;
11* end;
SQL> /
31999
PL/SQL procedure successfully completed.