使用触发器来监控表的使用情况

   
     

    
      
    
      监控表的使用有那么几种方式

    
      1
    
      . 审计,10g的颗粒度已经很细了,磁盘空间是个问题.

    
      2
    
      . 还有就是查看 FLASHBACK_TRANSACTION_QUERY,但是这个与undo_retention以及undo大小有关系,表大的话,查这个很费劲.

    
      3
    
      . 再来就是触发器,高并发的情况下要谨慎使用.

闲话不多说,做个用触发器监控数据表使用的例子.
先建立测试表.


    
      create
    
       
    
      table
    
       TGLOG
(
 USERCODE 
    
      VARCHAR2
    
      (
    
      25
    
      ) 
    
      not
    
       
    
      null
    
      ,
 TIME DATE 
    
      not
    
       
    
      null
    
      ,
 TYPE 
    
      VARCHAR2
    
      (
    
      25
    
      ) 
    
      not
    
       
    
      null
    
      ,
 IP 
    
      VARCHAR2
    
      (
    
      25
    
      ) 
    
      not
    
       
    
      null
    
      ,
 RAMARK1 
    
      VARCHAR2
    
      (
    
      25
    
      ) 
    
      not
    
       
    
      null
    
      ,
 REMARK2 
    
      VARCHAR2
    
      (
    
      225
    
      )
);


    
      create
    
       
    
      table
    
       TGTEST
(
 USERCODE 
    
      VARCHAR2
    
      (
    
      10
    
      ) 
    
      not
    
       
    
      null
    
      ,
 LMAGENTID 
    
      VARCHAR2
    
      (
    
      25
    
      ) 
    
      not
    
       
    
      null
    
      ,
 REMARK 
    
      VARCHAR2
    
      (
    
      225
    
      ),
 VALIDSTATUS 
    
      VARCHAR2
    
      (
    
      1
    
      ) 
    
      not
    
       
    
      null
    
      ,
 FLAG 
    
      VARCHAR2
    
      (
    
      1
    
      )
);

目标:对TGTEST的inser,
    
      update
    
      ,
    
      delete
    
       都记录下相应信息
(操作类型,username,
    
      timestamp
    
      ,ip,machine,module),并且只跟踪usercode
    
      =
    
      '
    
      0000000000
    
      '
    
      的数据.


    
      CREATE
    
       
    
      OR
    
       
    
      REPLACE
    
       
    
      TRIGGER
    
       tg_trace_tab_tgtest
AFTER 
    
      UPDATE
    
       
    
      or
    
       
    
      delete
    
       
    
      or
    
       
    
      insert
    
       
    
      ON
    
       TGTEST 
REFERENCING NEW 
    
      AS
    
       New OLD 
    
      AS
    
       Old

    
      FOR
    
       EACH ROW

    
      DECLARE
    
       
v_type 
    
      VARCHAR2
    
      (
    
      500
    
      );
old_value 
    
      int
    
      ;
new_value 
    
      int
    
      ;

    
      BEGIN
    
      
 v_type:
    
      =
    
      ''
    
      ;
 
 old_value:
    
      =
    
      :old.usercode; 
 new_value:
    
      =
    
      :new.usercode;
 
 
    
      if
    
      (old_value
    
      =
    
      '
    
      0000000000
    
      '
    
       
    
      or
    
       new_value
    
      =
    
      '
    
      0000000000
    
      '
    
      ) 
    
      then
    
       
 
 
    
      IF
    
       inserting 
    
      THEN
    
      
 v_type:
    
      =
    
      '
    
      INSERT
    
      '
    
      ;
 ELSIF updating 
    
      THEN
    
      
 v_type:
    
      =
    
      '
    
      UPDATE
    
      '
    
      ;
 ELSIF deleting 
    
      THEN
    
      
 v_type:
    
      =
    
      '
    
      DELETE
    
      '
    
      ;
 
    
      END
    
       
    
      IF
    
      ;
 
    
      INSERT
    
       
    
      INTO
    
       tglog
 
    
      select
    
       username,sysdate,v_type,SYS_CONTEXT(
    
      '
    
      USERENV
    
      '
    
      ,
    
      '
    
      IP_ADDRESS
    
      '
    
      ),machine,program
 
    
      from
    
       v$session 
    
      where
    
       AUDSID 
    
      =
    
       USERENV(
    
      '
    
      SESSIONID
    
      '
    
      );
 
    
      end
    
       
    
      if
    
      ;


    
      END
    
      ;

    
      /
    
      

OK,可以开始测试了.


    
      INSERT
    
       
    
      INTO
    
       tgtest 
    
      SELECT
    
       
    
      '
    
      0000000000
    
      '
    
      ,
    
      '
    
      22
    
      '
    
      ,
    
      '
    
      333
    
      '
    
      ,
    
      '
    
      1
    
      '
    
      ,
    
      '
    
      1
    
      '
    
       
    
      FROM
    
       dual ; 

    
      COMMIT
    
       ;

    
      UPDATE
    
       tgtest 
    
      SET
    
       flag
    
      =
    
      0
    
       
    
      WHERE
    
       usercode
    
      =
    
      '
    
      0000000000
    
      '
    
      ;

    
      COMMIT
    
       ;

    
      DELETE
    
       
    
      FROM
    
       tgtest 
    
      WHERE
    
       usercode
    
      =
    
      '
    
      0000000000
    
      '
    
      ;

    
      COMMIT
    
      ;


    
      SELECT
    
       
    
      *
    
       
    
      FROM
    
       tglog 
    
      ORDER
    
       
    
      BY
    
       TIME 
    
      ASC
    
       ;

USERCODE TIME TYPE IP RAMARK1 REMARK2

    
      --
    
      -------- ------------------- ---------- ------------------------- ------------------------- --------------------
    
      

    
      FUDB 
    
      2010
    
      -
    
      07
    
      -
    
      22
    
       
    
      17
    
      :
    
      20
    
      :
    
      20
    
       
    
      111
    
       
    
      192.168
    
      .
    
      3.188
    
       MSHOME\TPADGERRARD plsqldev.exe
FUDB 
    
      2010
    
      -
    
      07
    
      -
    
      22
    
       
    
      17
    
      :
    
      38
    
      :
    
      34
    
       
    
      INSERT
    
       
    
      192.168
    
      .
    
      3.188
    
       MSHOME\TPADGERRARD plsqldev.exe
FUDB 
    
      2010
    
      -
    
      07
    
      -
    
      22
    
       
    
      17
    
      :
    
      38
    
      :
    
      59
    
       
    
      INSERT
    
       
    
      192.168
    
      .
    
      3.188
    
       MSHOME\TPADGERRARD plsqldev.exe
FUDB 
    
      2010
    
      -
    
      07
    
      -
    
      22
    
       
    
      17
    
      :
    
      39
    
      :
    
      34
    
       
    
      INSERT
    
       
    
      192.168
    
      .
    
      3.188
    
       MSHOME\TPADGERRARD plsqldev.exe
FUDB 
    
      2010
    
      -
    
      07
    
      -
    
      22
    
       
    
      17
    
      :
    
      41
    
      :
    
      03
    
       
    
      UPDATE
    
       
    
      192.168
    
      .
    
      3.188
    
       MSHOME\TPADGERRARD plsqldev.exe
FUDB 
    
      2010
    
      -
    
      07
    
      -
    
      22
    
       
    
      21
    
      :
    
      15
    
      :
    
      20
    
       
    
      DELETE
    
       
    
      192.168
    
      .
    
      3.188
    
       MSHOME\TPADGERRARD plsqldev.exe
FUDB 
    
      2010
    
      -
    
      07
    
      -
    
      22
    
       
    
      21
    
      :
    
      15
    
      :
    
      56
    
       
    
      INSERT
    
       
    
      192.168
    
      .
    
      3.188
    
       MSHOME\TPADGERRARD plsqldev.exe
FUDB 
    
      2010
    
      -
    
      07
    
      -
    
      22
    
       
    
      21
    
      :
    
      16
    
      :
    
      40
    
       
    
      DELETE
    
       
    
      192.168
    
      .
    
      3.188
    
       MSHOME\TPADGERRARD plsqldev.exe
FUDB 
    
      2010
    
      -
    
      07
    
      -
    
      22
    
       
    
      21
    
      :
    
      32
    
      :
    
      20
    
       
    
      INSERT
    
       
    
      192.168
    
      .
    
      3.49
    
       WORKGROUP\MESORACLE sqlplus.exe