plsql for循环里赋值出错PLS00363:，应该改成while循环

create or replace procedure deleteBigData as
2 date_length number;
3 temp NUMBER(19, 0);
4 Begin
5 temp :=0;
6 select count(*) into date_length from tbl_log;
7 for temp in 1..date_length
8 loop
9 delete from tbl_log where rownum=temp;
10 if temp=10000 then
11 temp:=0;
12 commit;
13 end if;
14 end loop;
15 end;
16 /

Warning: Procedure created with compilation errors.

LINE/COL ERROR
-------- -----------------------------------------------------------------
11/2 PL/SQL: Statement ignored
11/2 PLS-00363: expression 'TEMP' cannot be used as an assignment
target

改正为while循环

create or replace procedure deleteBigData is
date_length number;
temp NUMBER(19, 0);
Begin
temp:=1;
select count(*) into date_length from tbl_log;
while temp<date_length
loop
delete from tbl_log where rownum=temp;
if temp=10000 then
temp:=0;
commit;
end if;
end loop;
end;
/