ORA-14450
ORA-14450: attempt to access a transactional temp table already in use
在ORACLE数据中修改会话级临时表时,有可能会遇到ORA-14550错误,那么为什么会话级全局临时表会报ORA-14450错误呢,如下所示,我们先从一个小小案例入手:
案例1:
SQL> CREATE GLOBAL TEMPORARY TABLE TEMP_TEST
2 (
3 NAME VARCHAR2(12)
4 ) ON COMMIT PRESERVE ROWS;
Table created.
SQL> INSERT INTO TEMP_TEST VALUES('kerry');
1 row created.
SQL> COMMIT;
Commit complete.
SQL> ALTER TABLE TEMP_TEST ADD SEX NUMBER(1) ;
ALTER TABLE TEMP_TEST ADD SEX NUMBER(1)
*
ERROR at line 1:
ORA-14450: attempt to access a transactional temp
table already in use
如上所示,修改会话级临时表时遇到了ORA-14450错误,那么有哪些解决方法呢?
这时需要断开会话或执行TRUNCATE语句:
SQL> TRUNCATE TABLE TEMP_TEST;
Table truncated.
SQL> ALTER
TABLE TEMP_TEST ADD SEX NUMBER(1) ;
Table altered.
SQL>
如下所示,我们模拟一个会话在操作临时表TEMP_TEST,
另外一个会话准备修改它,如下所示(实际场景可能更复杂,可能涉及多个会话而不是仅仅两个会话)
SQL> SET SQLPROMPT "SQLSESSION 1 >"
SQLSESSION 1 >CREATE GLOBAL TEMPORARY TABLE
TEMP_TEST
2 (
3 NAME VARCHAR2(12)
4 ) ON COMMIT PRESERVE ROWS;
Table created.
SQLSESSION 1 >INSERT INTO TEMP_TEST
VALUES('kerry');
1 row created.
SQLSESSION 1 >COMMIT;
Commit complete.
SQLSESSION 1 >
SQL> SET SQLPROMPT "SESSION 2 >"
SESSION 2 >ALTER TABLE TEMP_TEST ADD SEX NUMBER(1)
;
ALTER TABLE TEMP_TEST ADD SEX NUMBER(1)
*
ERROR at line 1:
ORA-14450: attempt to access a transactional temp
table already in use
SESSION 2 >
那么此时,会话1是其它用户登录的。比如应用程序等,你不可能要求所有会话都去执行TRUNCATE操作,这个时候该怎么处理呢?
此时你可以使用下面步骤解决这个问题。
Step 1、以sys或system登录数据库,先从DBA_OBJECTS中查询到该表的OBJECT_ID:
SELECT
OWNER, OBJECT_ID,OBJECT_TYPE
FROM
DBA_OBJECTS
WHERE
OBJECT_NAME=&OBJECT_NAME AND
OBJECT_TYPE ='TABLE';
Step 2、根据查到的OBJECT_ID知道使用该表的SESSION:
SELECT ADDR,
KADDR, SID,LMODE FROM V$LOCK WHERE ID1=&OBJECT_ID;
Step 3、通过下面SQL找到对应的会话并生成KILL SESSION的执行语句
SET
COL kill_session FOR
A80;
select
a.sid, a.serial#,a.status,
a.paddr, 'alter
system kill session '''
|| a.sid || ','
|| a.serial#
|| '''
immediate;' AS
kill_session
FROM
v$session a
WHERE
a.sid in
(select
sid from
v$enqueue_lock t where
t.type='TO')
and
a.sid=&sid;
Step 4、查看会话状态,并执行ALTER SYSTEM KILL
SESSION语句杀掉这些进程:
具体操作步骤,如下截图所示:
该贴被潇湘隐者编辑于2014-10-26 10:59:15该贴由hui.chen转至本版2014-11-5 16:24:10