LOGMNR包挖掘在线日志(5)

SQL> select scn,timestamp,log_id,seg_owner,seg_type,table_space,data_blk#,data_obj#,data_objd#,session#,serial#,username,session_info,sql_redo,sql_undo 
2  from v$logmnr_contents t
3  where t.sql_redo like 'create%';
from v$logmnr_contents t
    *
ERROR at line 2:
ORA-01306: dbms_logmnr.start_logmnr() must be invoked before selecting from v$logmnr_contents

并且要重新指定挖掘的日志对象，否则依然报错：

SQL> exec dbms_logmnr.start_logmnr(options=>dbms_logmnr.dict_from_online_catalog);
BEGIN dbms_logmnr.start_logmnr(options=>dbms_logmnr.dict_from_online_catalog); END;

*
ERROR at line 1:
ORA-01292: no log file has been specified for the current LogMiner session
ORA-06512: at "SYS.DBMS_LOGMNR", line 58
ORA-06512: at line 1