11.2.0.1:
SUNDOG315>select * from v$version;

BANNER
--------------------------------------------------------------------------------

Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
PL/SQL Release 11.2.0.1.0 - Production
CORE 11.2.0.1.0 Production
TNS for 32-bit Windows: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production

SUNDOG315>create table t as select * from dba_objects;

表已创建。

SUNDOG315>alter system flush shared_pool;

系统已更改。

SUNDOG315>select count(*) from v$sql t where t.SQL_TEXT like 'select count(*)
from t%';

COUNT(*)
----------
0

SUNDOG315>declare
2 type numTab is table of pls_integer index by binary_integer;
3
4 i pls_integer;
5 nCount pls_integer;
6 fld_object_id numTab;
7 begin
8 execute immediate 'alter session set cursor_sharing=force';
9 select object_id bulk collect into fld_object_id from t where rownum<=100
0;
10
11 for i in 1..fld_object_id.count loop
12 execute immediate
13 'select count(*)
14 from t
15 where object_id = '||fld_object_id(i) into nCount;
16 end loop;
17 end;
18 /

PL/SQL 过程已成功完成。

SUNDOG315>select count(*) from v$sql t where t.SQL_TEXT like 'select count(*)
from t%';

COUNT(*)
----------
995

10.2.0.4:
SQL> select * from v$version;

BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Prod
PL/SQL Release 10.2.0.4.0 - Production
CORE 10.2.0.4.0 Production
TNS for Linux: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production

SQL> create table t as select * from dba_objects;

表已创建。

SQL> alter system flush shared_pool;

系统已更改。

SQL> select count(*) from v$sql t where t.SQL_TEXT like 'select count(*)
2 from t%';

COUNT(*)
----------
0

SQL> declare
2 type numTab is table of pls_integer index by binary_integer;
3
4 i pls_integer;
5 nCount pls_integer;
6 fld_object_id numTab;
7 begin
8 execute immediate 'alter session set cursor_sharing=force';
9 select object_id bulk collect into fld_object_id from t where rownum<=100
0;
10
11 for i in 1..fld_object_id.count loop
12 execute immediate
13 'select count(*)
14 from t
15 where object_id = '||fld_object_id(i) into nCount;
16 end loop;
17 end;
18 /

PL/SQL 过程已成功完成。

SQL> select count(*) from v$sql t where t.SQL_TEXT like 'select count(*)
from t%';

COUNT(*)
----------
1

SQL> select sql_text from v$sql t where t.SQL_TEXT like 'select count(*)
from t%';

SQL_TEXT
--------------------------------------------------------------------------------

select count(*) from t where object_id = :"SYS_B_0"

10G运行的好好的，在11Gcursor_sharing=force就不起作用了。郁闷[@more@]

ITPub博客

cursor_sharing=force不好用了

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