oracle表不能DDL和存储过程不能创建处理方法

    在做数据迁移的过程中，我们会面临两种常见的hang住场景：

    1.表不能修改加字段，不能增大长度。

    2.存储过程不能覆盖。

场景1：为表添加字段hang住的处理

session1:

create table test as select * from dba_objects;

select * from test where object_id = 20 for update;
session2:

alter table test add  aa number;--hang住
session3:

SELECT bs.username "Blocking User",

       bs.username "DB User",

       bs.SID "SID",

       bs.serial# "Serial#",

       bs.sql_address "address",

       bs.sql_hash_value "Sql hash",

       bs.program "Blocking App",  

       bs.machine "Blocking Machine",

       bs.osuser "Blocking OS User",

       bs.serial# "Serial#",                      

       ws.username "Waiting User",

       ws.SID "WSID",

       ws.program "Waiting App",

       ws.machine "Waiting Machine",

       ws.osuser "Waiting OS User",

       ws.serial# "WSerial#",

       wk.TYPE lock_type,

       hk.lmode mode_held,

       wk.request mode_requested,

       TO_CHAR(hk.id1) lock_id1,

       TO_CHAR(hk.id2) lock_id2,

       hk.BLOCK blocking_others

  FROM v$lock hk, v$session bs, v$lock wk, v$session ws

 WHERE hk.BLOCK = 1

   AND hk.lmode != 0

   AND hk.lmode != 1

   AND wk.request != 0

   AND wk.TYPE(+) = hk.TYPE

   AND wk.id1(+) = hk.id1

   AND wk.id2(+) = hk.id2

   AND hk.SID = bs.SID(+)

   AND wk.SID = ws.SID(+)

   AND (bs.username IS NOT NULL)

   AND (bs.username <> 'SYSTEM')

   AND (bs.username <> 'SYS')

 ORDER BY 1;

 

Blocking User TEST

DB User TEST
SID 8     --锁持有者sid

Serial# 16603 --锁持有者serial#

address 00

Sql hash 0

Blocking App PlSqlDev.exe

Blocking Machine COMTOP\HLPNT2X

Blocking OS User Administrator

Serial# 16603

Waiting User TEST

WSID 11

Waiting App PlSqlDev.exe

Waiting Machine COMTOP\HLPNT2X

Waiting OS User Administrator

WSerial# 14858

LOCK_TYPE TX

MODE_HELD 6

MODE_REQUESTED 4

LOCK_ID1 589845

LOCK_ID2 5272

BLOCKING_OTHERS 1

alter system kill session '8,16603';--干掉session,注意的是如果是RAC，视图都要加上G,如v$lock，是GV$lock。



场景2：存储过程不能覆盖

session1 新建并执行:

create or replace procedure p_test_pin 

as

begin

 dbms_lock.sleep(3000);

end;

call p_test_pin();

session2 覆盖:

create or replace procedure p_test_pin()

begin

 dbms_lock.sleep(1000);

end;

方法1，找到所在会话和进程id,如果是RAC则都要查GV：

x$kglpn  library cache pin信息

x$kglob  library cache object信息


SQL> SELECT s.sid,s.SERIAL#, kglpnmod "Mode", kglpnreq "Req", SPID "OS Process"

     FROM v$session_wait w, sys.x$kglpn p, v$session s, v$process o

    WHERE p.kglpnuse = s.saddr

      AND kglpnhdl = w.p1raw

      and w.event like '%library cache pin%'

      and s.paddr = o.addr;

       SID    SERIAL#       Mode        Req OS Process

---------- ---------- ---------- ---------- -------------------

         8      17376          2          0 22118

       133       4430          0          3 22120
如果有library cache lock这样的等待事件也是一样的处理方式，把w.event like '%library cache pin%'换成w.event like '%library cache lock%'即可，上次遇到不能删除同义词，也是按照这种方法处理的。
先杀掉会话：alter system kill session '8,17376';

如果会话杀不掉，则只有从操作系统层面杀进程：kill -9 22118

       

方法2，找到持有者：       

SQL>  SELECT sid Holder_sid,

           SERIAL# hold_SERIAL,

          KGLPNUSE Sesion,

          KGLPNMOD Held,

          KGLPNREQ Req

     FROM sys.x$kglpn, v$session

    WHERE KGLPNHDL IN (SELECT p1raw

                         FROM v$session_wait

                        WHERE event LIKE 'library cache pin%')

          AND KGLPNMOD <> 0

          AND v$session.saddr = x$kglpn.kglpnuse;

HOLDER_SID HOLD_SERIAL SESION                 HELD        REQ

---------- ----------- ---------------- ---------- ----------

         8       17376 0000000127618FA8          2          0

找到持有者在执行什么SQL         

SQL>  SELECT sid, sql_text

      FROM v$session, v$sqlarea

     WHERE v$session.sql_address = v$sqlarea.address AND sid =8;

    SID        SQL_TEXT

   ------     -----------

     8        call p_test_pin()