许多情况下咱们需求别离删去数据表的一些记载，分批来提交以此来削减关于Undo的运用，下面咱们供给一个简略的存储进程来完成此逻辑。
SQL> create table test as select * from dba_objects;
Table created.
SQL> create or replace procedure deleteTab
2 /**
3 ** Usage: run the script to create the proc deleteTab
4 ** in SQL*PLUS, type exec deleteTab(‘Foo’,’ID>=1000000′,’3000′);
5 ** to delete the records in the table Foo, commit per 3000 records.
6 ** Condition with default value ‘1=1’ and default Commit batch is 10000.
7 **/
8 (
9 p_TableName in varchar2, — The TableName which you want to delete from
10 p_Condition in varchar2 default ‘1=1’, — Delete condition, such as id>=100000
11 p_Count in varchar2 default ‘10000’ — Commit after delete How many records
12 )
13 as
14 pragma autonomous_transaction;
15 n_delete number:=0;
16 begin
17 while 1=1 loop
18 EXECUTE IMMEDIATE
19 ‘delete from ‘||p_TableName||’ where ‘||p_Condition||’ and rownum = :rn’
20 USING p_Count;
21 if SQL%NOTFOUND then
22 exit;
23 else
24 n_delete:=n_delete + SQL%ROWCOUNT;
25 end if;
26 commit;
27 end loop;
28 commit;
29 DBMS_OUTPUT.PUT_LINE(‘Finished!’);
30 DBMS_OUTPUT.PUT_LINE(‘Totally ‘||to_char(n_delete)||’ records deleted!’);
31 end;
32 /
Procedure created.
SQL> insert into test select * from dba_objects;
6374 rows created.
SQL> /
6374 rows created.
SQL> /
6374 rows created.
SQL> commit;
Commit complete.
SQL> exec deleteTab(‘TEST’,’object_id >0′,’3000′)
Finished!
Totally 19107 records deleted!
PL/SQL procedure successfully completed.
注释：在此实例中批改了一下,增加了2个缺省值,以下是详细进程:
create or replace procedure deleteTab
(
p_TableName in varchar2,
— The TableName which you want to delete from
p_Condition in varchar2 default ‘1=1’,
— Delete condition, such as id>=100000
p_Count in varchar2 default ‘10000’
— Commit after delete How many records
)
as
pragma autonomous_transaction;
n_delete number:=0;
begin
while 1=1 loop
EXECUTE IMMEDIATE
‘delete from ‘||p_TableName||’
where ‘||p_Condition||’ and rownum = :rn’
USING p_Count;
if SQL%NOTFOUND then
exit;
else
n_delete:=n_delete + SQL%ROWCOUNT;
end if;
commit;
end loop;
commit;
DBMS_OUTPUT.PUT_LINE(‘Finished!’);
DBMS_OUTPUT.PUT_LINE(‘Totally ‘||to_char(n_delete)||’ records deleted!’);
