oracle database -----日誌挖掘

DML日誌挖掘：

1、添加database補充日誌
SQL>ALTER DATABASE ADD SUPPLEMENTAL LOG DATA; 
            
2、確定要分析的日誌範圍，添加日誌，分析
SQL>execute dbms_logmnr.add_logfile(logfilename=>'/redo1/redo05_1.log',options=>dbms_logmnr.new);

SQL>execute dbms_logmnr.add_logfile(logfilename=>'/archlog/arch_1.arc',options=>dbms_logmnr.addfile);

3、執行logmnr 分析
SQL>execute dbms_logmnr.start_logmnr(options=>dbms_logmnr.dict_from_online_catalog);

4、查詢分析結果，可以設置時間格式，也可以在顯示方式裏再確定格式.        
SQL>select username,scn,timestamp,sql_redo from v$logmnr_contents where seg_name='表名';

5、關閉日誌分析
SQL>execute dbms_logmnr.end_logmnr;

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DDL日誌挖掘：

添加database補充日誌
SQL>ALTER DATABASE ADD SUPPLEMENTAL LOG DATA; 

1、新建目錄
$ mkdir /home/oracle/logmnr
SQL> alter system set utl_file_dir='/home/oracle/logmnr' scope=spfile; 

SQL> execute dbms_logmnr_d.build('dict01.ora','/home/oracle/logmnr',dbms_logmnr_d.store_in_flat_file);


2、添加日誌分析

SQL> execute dbms_logmnr.add_logfile(logfilename=>'歸檔文件',options=>dbms_logmnr.new); 

SQL> execute dbms_logmnr.add_logfile(logfilename=>'歸檔文件',options=>dbms_logmnr.addfile);      

3、執行分析

SQL> execute dbms_logmnr.start_logmnr(dictfilename=>'/home/oracle/logmnr/dict01.ora',options=>dbms_logmnr.ddl_dict_tracking);
    
4、查看分析結果                                                      
SQL>select username,scn,timestamp,sql_redo from v$logmnr_contents where seg_name='表名';
                                                              
5、關閉日誌分析
SQL> execute dbms_logmnr.end_logmnr;