对于执行DDL前的操作无法挖掘，但是不报错。只显示DDL语句及DDL之后的DML操作。
更多logmnr挖掘DML操作，详见： 使用logmnr使用logmnr对其它用户的操作执行日志挖掘的四个对比实验
BYS@ bys3>select dbms_flashback.get_system_change_number from dual;
GET_SYSTEM_CHANGE_NUMBER
------------------------
                 3517212
BYS@ bys3>select * from test;
OBJECT_NAME  STATUS
------------ -------
11           22
10           15
10           15
BYS@ bys3 >delete test where status=22;
1 row deleted.
BYS@ bys3>commit;
Commit complete.
BYS@ bys3> truncate table test;
Table truncated.
BYS@ bys3> insert into test values(9,888);
1 row created.
BYS@ bys3>commit;
Commit complete.
BYS@ bys3>select * from test;
OBJECT_NAME  STATUS
------------ -------
9            888
BYS@ bys3>select dbms_flashback.get_system_change_number from dual;
GET_SYSTEM_CHANGE_NUMBER
------------------------
                 3517265
############# LOGMNR进行挖掘：--只看到DDL语句及之后的DML。
BYS@ bys3>col member for a30
BYS@ bys3>select a.group#,a.member,b.status from v$logfile a,v$log b where a.group#=b.group#;
    GROUP# MEMBER                         STATUS
---------- ------------------------------ ----------------
         1 /u01/oradata/bys3/redo01.log   INACTIVE
         2 /u01/oradata/bys3/redo02.log   CURRENT
         3 /u01/oradata/bys3/redo03.log   INACTIVE
BYS@ bys3>execute dbms_logmnr.add_logfile(LogFileName => '/u01/oradata/bys3/redo02.log',Options => dbms_logmnr.new);
PL/SQL procedure successfully completed.
BYS@ bys3>execute dbms_logmnr.start_logmnr(options =>dbms_logmnr.dict_from_online_catalog,startscn =>3517212,endscn =>3517265);
PL/SQL procedure successfully completed.

BYS@ bys3>col sql_undo for a60
BYS@ bys3>col sql_redo for a60
BYS@ bys3>set linesize 200
BYS@ bys3>col operation for a15
BYS@ bys3>select operation,sql_redo,sql_undo from v$logmnr_contents where table_name='TEST';
OPERATION       SQL_REDO                                                     SQL_UNDO
--------------- ------------------------------------------------------------ ------------------------------------------------------------
DDL             truncate table test;
INSERT          insert into "BYS"."TEST"("OBJECT_NAME","STATUS") values ('9' delete from "BYS"."TEST" where "OBJECT_NAME" = '9' and "STAT
                ,'888');                                                     US" = '888' and ROWID = 'AAAFdlAAEAAAAD1AAA';