字符集問題的初步探討(七)-字符集更改的內部操作

alter database character set INTERNAL_CONVERT ZHS16GBK
Updating character set in controlfile to ZHS16GBK
 SYS.SNAP$ (REL_QUERY) - CLOB representation altered
 SYS.METASTYLESHEET (STYLESHEET) - CLOB representation altered
 SYS.EXTERNAL_TAB$ (PARAM_CLOB) - CLOB representation altered
 XDB.XDB$RESOURCE (SYS_NC00027$) - CLOB representation altered
 ODM.ODM_PMML_DTD (DTD) - CLOB representation altered
 OE.WAREHOUSES (SYS_NC00003$) - CLOB representation altered
 PM.ONLINE_MEDIA (SYS_NC00042$) - CLOB representation altered
 PM.ONLINE_MEDIA (SYS_NC00062$) - CLOB representation altered
 PM.ONLINE_MEDIA (PRODUCT_TEXT) - CLOB representation altered
 PM.ONLINE_MEDIA (SYS_NC00080$) - CLOB representation altered
 PM.PRINT_MEDIA (AD_SOURCETEXT) - CLOB representation altered
 PM.PRINT_MEDIA (AD_FINALTEXT) - CLOB representation altered
Completed: alter database character set INTERNAL_CONVERT ZHS1

SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount
ORACLE instance started.

Total System Global Area  135337420 bytes
Fixed Size                   452044 bytes
Variable Size             109051904 bytes
Database Buffers           25165824 bytes
Redo Buffers                 667648 bytes
Database mounted.

SQL> ALTER SYSTEM ENABLE RESTRICTED SESSION;

System altered.

SQL> ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0;

System altered.

SQL> ALTER SYSTEM SET AQ_TM_PROCESSES=0;

System altered.

SQL> ALTER DATABASE OPEN;

Database altered.

SQL> alter session set events '10046 trace name context forever,level 12';

Session altered.

SQL> alter database character set INTERNAL_USE ZHS16CGB231280

Database altered.

SQL>

alter session set events '10046 trace name context forever,level 12'


alter database character set INTERNAL_USE ZHS16CGB231280


call     count       cpu    elapsed       disk      query    current        rows
------- ------  -------- ---------- ---------- ---------- ----------  ----------
Parse        1      0.00       0.00          0          0          0           0
Execute      1      4.88       6.04        910      16825      18099           0
Fetch        0      0.00       0.00          0          0          0           0
------- ------  -------- ---------- ---------- ---------- ----------  ----------
total        2      4.88       6.04        910      16825      18099           0

Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: SYS

Elapsed times include waiting on following events:
  Event waited on                             Times   Max. Wait  Total Waited
  ----------------------------------------   Waited  ----------  ------------
  control file sequential read                    4        0.00          0.00
  control file parallel write                     2        0.05          0.08
  log file sync                                   2        0.08          0.08
  SQL*Net message to client                       1        0.00          0.00
  SQL*Net message from client                     1       18.06         18.06
********************************************************************************

....

update col$ set charsetid = :1 
where
 charsetform = :2

....

update argument$ set charsetid = :1 
where
 charsetform = :2

....

update collection$ set charsetid = :1 
where
 charsetform = :2

....

update attribute$ set charsetid = :1 
where
 charsetform = :2
....

update parameter$ set charsetid = :1 
where
 charsetform = :2
....

update result$ set charsetid = :1 
where
 charsetform = :2

....

update partcol$ set spare1 = :1 
where
 charsetform = :2

....

update subpartcol$ set spare1 = :1 
where
 charsetform = :2

....

update props$ set value$ = :1 
where
 name = :2

....

update "SYS"."KOTAD___FCKpd___4quot; set SYS_NC_ROWINFO$ = :1 
where
 SYS_NC_OID$ = :2
....

update seq$ set increment$=:2,minvalue=:3,maxvalue=:4,cycle#=:5,order$=:6,
  cache=:7,highwater=:8,audit$=:9,flags=:10 
where
 obj#=:1

....

update kopm$ set metadata = :1,  length 
  = :2 
where
 name='DB_FDO'

....

ALTER DATABASE CLOSE NORMAL