ORA-01291: missing logfile 事务闪回缺失日志

实验遇到的问题： 1、刚开始做前面的实验的时候，resetlogs重置了联机日志，导致闪回的时候总是报miss logfile的错误。 这个时候需要用noretlogs的方式重建控制文件，然后重新启动数据库到open状态。 SQL SELECT distinct xid,commit_scn FROM flashback_tran

实验遇到的问题：
1、刚开始做前面的实验的时候，resetlogs重置了联机日志，导致闪回的时候总是报miss logfile的错误。
这个时候需要用noretlogs的方式重建控制文件，然后重新启动数据库到open状态。
SQL> SELECT distinct xid,commit_scn FROM flashback_transaction_query t
  2  where table_owner='HR'
  3  and   lower(t.table_name) = 'employees'
  4  and   t.commit_timestamp > systimestamp - interval '90' minute
  5  order by t.commit_scn ;
XID              COMMIT_SCN
---------------- ----------
100004005E010000    2948380
0E0019005E010000    2948386

SQL> declare
  2  xids sys.xid_array ;
  3  begin
  4    xids := sys.xid_array('100004005E010000');
  5    dbms_flashback.transaction_backout(1,xids,options => dbms_flashback.cascade);
  6  end ;
  7  /
declare
*
ERROR at line 1:
ORA-55507: Encountered mining error during Flashback Transaction Backout.
function:krvxpsr
ORA-01291: missing logfile
ORA-06512: at "SYS.DBMS_FLASHBACK", line 37
ORA-06512: at "SYS.DBMS_FLASHBACK", line 70
ORA-06512: at line 5
此问题是我之前启动数据库时候重置了日志文件，导致数据库不读日志。需要重建控制文件。

shutdown immediate
startup nomount
alter database backup controlfile to trace as 'J:appwufandiagrdbmsorclorcltracecontrol.trac';
CREATE CONTROLFILE REUSE DATABASE "ORCL" NORESETLOGS  ARCHIVELOG
    MAXLOGFILES 16
    MAXLOGMEMBERS 3
    MAXDATAFILES 100
    MAXINSTANCES 8
    MAXLOGHISTORY 292
LOGFILE
  GROUP 1 'J:APPWUFANORADATAORCLREDO01.LOG'  SIZE 50M BLOCKSIZE 512,
  GROUP 2 'J:APPWUFANORADATAORCLREDO02.LOG'  SIZE 50M BLOCKSIZE 512,
  GROUP 3 'J:APPWUFANORADATAORCLREDO03.LOG'  SIZE 50M BLOCKSIZE 512
-- STANDBY LOGFILE

DATAFILE
  'J:APPWUFANORADATAORCLSYSTEM01.DBF',
  'J:APPWUFANORADATAORCLSYSAUX01.DBF',
  'J:APPWUFANORADATAORCLUNDOTBS02.DBF',
  'J:APPWUFANORADATAORCLUSERS01.DBF',
  'J:APPWUFANORADATAORCLEXAMPLE01.DBF',
  'J:APPWUFANORADATAORCLUNDOTBS04.DBF',
  'J:APPWUFANORADATAORCLDATAFILEO1_MF_UNDOTBS4_CK602RTP_.DBF',
  'J:APPWUFANORADATAORCLDATAFILEO1_MF_TEST02_CK610HG8_.DBF',
  'J:APPWUFANORADATAORCLDATAFILEO1_MF_TEST02_CK611OKD_.DBF',
  'J:APPWUFANORADATAORCLDATA_TEST01.BDF',
  'J:APPWUFANORADATAORCLHEAT01.BDF'
CHARACTER SET ZHS16GBK
;
--这种情况其实不需要恢复，你执行了这条命令它会告诉你没有什么可恢复的。
RECOVER DATABASE;
--打开所有的补充日志文件，可以不做
ALTER DATABASE ADD SUPPLEMENTAL LOG DATA;
--打开系统归档，当前已经是归档状态，所以这条命令会报错，不用管
ALTER SYSTEM ARCHIVE LOG ALL;
--打开数据库
ALTER DATABASE OPEN;
至此，重建控制文件已经完成

重新进行试验
1、开两个事物
SQL> update hr.employees t
  2  set t.salary = t.salary * 2 ;
107 rows updated.
SQL> commit ;
Commit complete.
SQL> update hr.employees t
  2  set t.salary = t.salary * 1.1 ;
107 rows updated.
SQL> commit ;
Commit complete.
2、查询两个事物号
SQL> SELECT distinct xid,commit_scn FROM flashback_transaction_query t
  2  where table_owner='HR'
  3  and   lower(t.table_name) = 'employees'
  4  and   t.commit_timestamp > systimestamp - interval '15' minute
  5  order by t.commit_scn ;
XID              COMMIT_SCN
---------------- ----------
13001A0061010000    2983670
0F0021005D010000    2983677
3、执行事物闪回
SQL> declare
  2  xids sys.xid_array ;
  3  begin
  4    xids := sys.xid_array('13001A0061010000');
  5    dbms_flashback.transaction_backout(1,xids,options => dbms_flashback.nocascade);
  6  end ;
  7  /
declare
*
ERROR at line 1:
ORA-00600: internal error code, arguments: [ktgRunStmt_5], [25153], [ORA-25153:
Temporary Tablespace is Empty
ORA-00600: internal error code, arguments: [ktgRunStmt_5], [25153], [ORA-25153:
Temporary Tablespace is Empty
], [], [], [], [], [], [], [], [], []
], [], [], [], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [ktgRunStmt_5], [25153], [ORA-25153:
Temporary Tablespace is Empty
], [], [], [], [], [], [], [], [], []
ORA-06512: at "SYS.DBMS_FLASHBACK", line 37
ORA-06512: at "SYS.DBMS_FLASHBACK", line 70
ORA-06512: at line 5
看着报错多吓人！其实问题就在于
[ORA-25153:
Temporary Tablespace is Empty
临时表空间是空的。下面就来确认这个问题：
--当前用户默认临时表空间
SQL> select username,temporary_tablespace from dba_users where username='SYS';
USERNAME                       TEMPORARY_TABLESPACE
------------------------------ ------------------------------
SYS                            TEMP_01
--默认表空间逻辑上是联机的，没问题
SQL> select tablespace_name,status from dba_tablespaces where tablespace_name='TEMP_01';
TABLESPACE_NAME                STATUS
------------------------------ ---------
TEMP_01                        ONLINE
--物理上没有文件，问题就在这儿
SQL> select file_name,tablespace_name from dba_temp_files;
no rows selected
--确定临时文件是存在的，把该临时文件添加到表空间
SQL> alter tablespace temp add tempfile 'J:appwufanoradataorcltemp01.dbf';
Tablespace altered.
--上面那条语句把文件对应到temp表空间了，其实sys的默认临时表空间是temp_01。
SQL> select tablespace_name,file_name from dba_temp_files;
TABLESPACE_NAME
------------------------------
FILE_NAME
--------------------------------------------------------------------------------
TEMP
J:APPWUFANORADATAORCLTEMP01.DBF
--将错就错吧，就将sys默认表空间改成temp吧
SQL> alter user sys temporary tablespace temp;
User altered.
--查看是否改过来了
SQL> select username,temporary_tablespace from dba_users where username='SYS';
USERNAME                       TEMPORARY_TABLESPACE
------------------------------ ------------------------------
SYS                            TEMP
重新进行实验：
开启连个事务：
--这边报了个错，因为做了很多次实验，现在这个薪水的值已经很大了，超出了字段的长度
SQL> update hr.employees t
  2  set t.salary = t.salary * 2 ;
set t.salary = t.salary * 2
                        *
ERROR at line 2:
ORA-01438: value larger than specified precision allowed for this column

SQL> commit ;
Commit complete.
SQL> update hr.employees t
  2  set t.salary = t.salary * 1.1 ;
107 rows updated.
SQL> commit ;
Commit complete.
--因为失败了一个语句，所以查询就只有3个事务。
SQL> SELECT distinct xid,commit_scn FROM flashback_transaction_query t
  2  where table_owner='HR'
  3  and   lower(t.table_name) = 'employees'
  4  and   t.commit_timestamp > systimestamp - interval '15' minute
  5  order by t.commit_scn ;
XID              COMMIT_SCN
---------------- ----------
13001A0061010000    2983670
0F0021005D010000    2983677
0D00050064010000    2984032
--执行回退到倒数第二个事务，用nocascade
SQL> declare
  2  xids sys.xid_array ;
  3  begin
  4    xids := sys.xid_array('0F0021005D010000');
  5    dbms_flashback.transaction_backout(1,xids,options => dbms_flashback.nocascade);
  6  end ;
  7  /
declare
*
ERROR at line 1:
ORA-55504: Transaction conflicts in NOCASCADE mode
ORA-06512: at "SYS.DBMS_FLASHBACK", line 37
ORA-06512: at "SYS.DBMS_FLASHBACK", line 70
ORA-06512: at line 5
--失败了，因为倒数第二个事务依赖于倒数第一个事务
--重新用cascade选项，把倒数第二个事务依赖的第一个事务一起回退掉
SQL> declare
  2  xids sys.xid_array ;
  3  begin
  4    xids := sys.xid_array('0F0021005D010000');
  5    dbms_flashback.transaction_backout(1,xids,options => dbms_flashback.cascade);
  6  end ;
  7  /
PL/SQL procedure successfully completed.
--过程执行成功，但是别忘了commit，oracle在过程里面并没有提交，需要你手动提交才能生效
SQL> commit ;
Commit complete.
SQL>