Ora-6512 error in string appending , plz guide to soleve this.

Question

declare
x varchar2(4000);
y varchar2(10000);
cursor c is select ename||'----'||to_char(empno) from emp; /*( to_char or no to_char it did not matter)*/
begin
open c;
loop
fetch c into y ;
exit when(sql%notfound);
--if c%rowcount = 1 then
-- x:=y;
-- else
x:=x||y; -- end if;
end loop;
close c;
dbms_output.put(x);
--exception
-- when others then
-- dbms_output.put_line(sqlerrm);
-- dbms_output.put_line(sqlcode);
end;
above code gives error as
ERROR at line 1:
ORA-06502: PL/SQL: numeric or value error
ORA-06512: at line 13
it seems string appending has problem. pls suggest a work around.
regards

Answer 1

thanks,
yes it should have been. c%notfound
declare
x varchar2(4000);
y varchar2(100);
cursor c is select ename||'----'||empno||chr(10) from emp;
begin
open c;
loop
fetch c into y ;
exit when c%notfound;
if c%rowcount = 1 then
x:=y;
else
x:=x||y;
end if;
end loop;
close c;
dbms_output.put_line(x);
--exception
-- when others then
-- dbms_output.put_line(sqlerrm);
-- dbms_output.put_line(sqlcode);
end;
Now the error i find is
ERROR at line 1:
ORA-20000: ORU-10028: line length overflow, limit of 255 chars per line
ORA-06512: at "SYS.DBMS_OUTPUT", line 35
ORA-06512: at "SYS.DBMS_OUTPUT", line 133
ORA-06512: at line 17
what i am trying is :- to store multiple records in single variable as multiline not single line. that's why i am using chr(10) (new line). Now i am facing the above error.
regards ravi