分类目录归档:Oracle 开发

触发器找出密码错误应用

经常会遇到修改oracle业务用户密码之后,由于部分应用密码没有被正确修改(忘记修改,或者修改错误了),导致数据库被hang或者用户被锁的情况,对于这样的情况,通过一个logon触发器可以快速找到

create or replace trigger logon_denied_to_alert
after servererror on database
declare
 message   varchar2(120);
 IP        varchar2(15);
 v_os_user varchar2(80);
 v_module  varchar2(50);
 v_action  varchar2(50);
 v_pid     varchar2(10);
 v_sid     number;
 v_username  varchar2(50);
 v_suser      varchar2(50);
begin
 IF (ora_is_servererror(1017)) THEN
   if sys_context('userenv', 'network_protocol') = 'tcp' then
     IP := sys_context('userenv', 'ip_address');
   else
     select distinct sid into v_sid from sys.v_$mystat;
     SELECT p.SPID
       into v_pid
       FROM V$PROCESS p, V$SESSION v
      WHERE p.ADDR = v.PADDR
        AND v.sid = v_sid;
   end if;
   v_os_user := sys_context('userenv', 'os_user');
   v_username := sys_context('userenv', 'CURRENT_USER');
   v_suser := SYS_CONTEXT('USERENV','SESSION_USER');
   dbms_application_info.READ_MODULE(v_module, v_action);
   message := to_char(sysdate, 'Dy Mon dd HH24:MI:SS YYYY') ||
              ' logon denied from '||v_username||' '||v_suser||' '|| nvl(IP, v_pid) || ' ' || v_os_user ||
              ' with ' || v_module || ' ' || v_action;
   sys.dbms_system.ksdwrt(2, message);
 end if;
end;
/

测试

SQL> create user test identified by oracle;

User created.

SQL> grant dba to test;

Grant succeeded.

直接本地登录

SQL> conn test/test
ERROR:
ORA-01017: invalid username/password; logon denied


Warning: You are no longer connected to ORACLE.

---alert日志记录
Wed Nov 01 23:15:04 2023 logon denied from SYS  12886 oracle with sqlplus@iZbp1hx0enix3hix1kvyrxZ (TNS V1-V3) 

通过tns登录

SQL> conn  test/oracl1@172.27.54.81:1522/orcl
ERROR:
ORA-01017: invalid username/password; logon denied


Warning: You are no longer connected to ORACLE.

---alert日志报错
Wed Nov 01 23:31:51 2023 logon denied from SYS  172.27.54.81 oracle with sqlplus@iZbp1hx0enix3hix1kvyrxZ (TNS V1-V3) 
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plsql 插入blob

plsql 插入blob

SQL> create bigfile tablespace t_xifenfei datafile 'e:/oradata/orcl/t_blob.dbf' size 128M autoextend on;

表空间已创建。


SQL> create table u0425.t_blob(a int, b varchar(10), c blob) tablespace t_xifenfei ;

表已创建。


SQL> create or replace directory expdp_dir as 'e:/';

目录已创建。


SQL> declare
  2  b_file bfile;
  3  b_lob blob;
  4  begin
  5  insert into u0425.t_blob(a,b,c) values(1,'xifenfei', empty_blob()) return c into b_lob;
  6  b_file:=bfilename('EXPDP_DIR','0430.DMP');
  7  dbms_lob.open(b_file,dbms_lob.file_readonly);
  8  dbms_lob.loadfromfile(b_lob,b_file,dbms_lob.getlength(b_file));
  9  dbms_lob.close(b_file);
 10  commit;
 11  end;
 12  /

PL/SQL 过程已成功完成。

SQL> select * from u0425.t_blob where rownum<2;

         A B
---------- ----------
C
--------------------------------------------------------------------------------
         1 xifenfei
0301914E3B98006780BC00019FC70146A1A3633DBC4B089DCF3DFCD951D559000000010000100003
6907E6041E0D3037000000020200000077D10000000000FA1A880022535953222E225359535F4558


SQL> select a,b,dbms_lob.getlength(c) from u0425.t_blob where rownum<2;

         A B          DBMS_LOB.GETLENGTH(C)
---------- ---------- ---------------------
         1 xifenfei               142024704

插入的blob字段和实际文件大小,内容一致,插入是成功的
20220502164359
20220502164727


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ORACEL坏查询对象批量脚本

查询坏块

SQL> set lines 120
SQL> select * from v$database_block_corruption;

     FILE#     BLOCK#     BLOCKS CORRUPTION_CHANGE# CORRUPTIO      
---------- ---------- ---------- ------------------ ---------      
         3      35418          1                  0 FRACTURED      
         3      61344          1                  0 FRACTURED      
         3      31065          1                  0 CORRUPT        
         3      36673          1                  0 CORRUPT        
         3      36721          1                  0 CORRUPT        
         3      42881          1                  0 CORRUPT        
         1      66738          1                  0 CORRUPT        
         3      36329          1                  0 CORRUPT        
         3      36617          1                  0 CORRUPT        
         3      32404          1                  0 FRACTURED      
         3      36281          1                  0 FRACTURED      

     FILE#     BLOCK#     BLOCKS CORRUPTION_CHANGE# CORRUPTIO      
---------- ---------- ---------- ------------------ ---------      
         3      36625          1                  0 FRACTURED      
         1      39041          1                  0 CORRUPT        
         3      36713          1                  0 CORRUPT        
        10      69927          1                  0 FRACTURED      
        26      94244          1                  0 CORRUPT        

已选择16行。

查询坏块对应对象

SQL> set pagesize 2000
SQL>          set linesize 250
SQL>      SELECT e.owner, e.segment_type, e.segment_name, e.partition_name, c.file#
  2       , greatest(e.block_id, c.block#) corr_start_block#
  3       , least(e.block_id+e.blocks-1, c.block#+c.blocks-1) corr_end_block#
  4       , least(e.block_id+e.blocks-1, c.block#+c.blocks-1)
  5         - greatest(e.block_id, c.block#) + 1 blocks_corrupted
  6       , null description
  7    FROM dba_extents e, v$database_block_corruption c
  8   WHERE e.file_id = c.file#
  9     AND e.block_id <= c.block# + c.blocks - 1
 10     AND e.block_id + e.blocks - 1 >= c.block#
 11  UNION
 12  SELECT s.owner, s.segment_type, s.segment_name, s.partition_name, c.file#
 13       , header_block corr_start_block#
 14       , header_block corr_end_block#
 15       , 1 blocks_corrupted
 16       , 'Segment Header' description
 17    FROM dba_segments s, v$database_block_corruption c
 18   WHERE s.header_file = c.file#
 19     AND s.header_block between c.block# and c.block# + c.blocks - 1
 20  UNION
 21  SELECT null owner, null segment_type, null segment_name, null partition_name, c.file#
 22       , greatest(f.block_id, c.block#) corr_start_block#
 23       , least(f.block_id+f.blocks-1, c.block#+c.blocks-1) corr_end_block#
 24       , least(f.block_id+f.blocks-1, c.block#+c.blocks-1)
 25         - greatest(f.block_id, c.block#) + 1 blocks_corrupted
 26       , 'Free Block' description
 27    FROM dba_free_space f, v$database_block_corruption c
 28   WHERE f.file_id = c.file#
 29     AND f.block_id <= c.block# + c.blocks - 1
 30     AND f.block_id + f.blocks - 1 >= c.block#
 31  order by file#, corr_start_block#;

OWNER            SEGMENT_TYPE       SEGMENT_NAME                 PARTITION_NAME                      FILE# CORR_START_BLOCK# CORR_END_BLOCK# BLOCKS_CORRUPTED DESCRIPTION
---------------- ----------------- ----------------------- ------------------------------- ------ ----------------- --------------- ---------------- --------------      
SYS              TABLE              OBJ$                                                        1             39041           39041                1                     
                                                                                                1             66738           66738                1 Free Block          
SYSMAN           INDEX              MGMT_METRICS_1HOUR_PK                                       3             31065           31065                1                     
SYS              TABLE              WRH$_SQL_BIND_METADATA                                      3             32404           32404                1                     
SYS              TABLE              WRH$_BG_EVENT_SUMMARY                                       3             35418           35418                1                     
SYS              INDEX PARTITION    WRH$_FILESTATXS_PK      WRH$_FILEST_1232289473_41482        3             36281           36281                1                     
SYS              TABLE PARTITION    WRH$_SYSTEM_EVENT       WRH$_SYSTEM_1232289473_41482        3             36329           36329                1                     
SYS              TABLE PARTITION    WRH$_SGASTAT            WRH$_SGASTA_1232289473_41482        3             36617           36617                1                     
SYS              INDEX PARTITION    WRH$_SGASTAT_U          WRH$_SGASTA_1232289473_41482        3             36625           36625                1                     
SYS              INDEX PARTITION    WRH$_PARAMETER_PK       WRH$_PARAME_1232289473_41482        3             36673           36673                1                     
SYS              TABLE PARTITION    WRH$_SERVICE_STAT       WRH$_SERVIC_1232289473_41482        3             36713           36713                1                     
SYS              INDEX PARTITION    WRH$_SERVICE_STAT_PK    WRH$_SERVIC_1232289473_41482        3             36721           36721                1                     
SYS              TABLE PARTITION    WRH$_LATCH              WRH$_LATCH_1232289473_41482         3             42881           42881                1                     
SYS              TABLE              WRI$_ADV_ACTIONS                                            3             61344           61344                1                     
EXAM             TABLE              EXAM_ITEMS_OLD                                             10             69927           69927                1                     
CPR              TABLE              NEED_MONITOR                                               26             94244           94244                1                     
                                                                                                                                                                         
已选择16行。                                                                                                                                                             
                                                                                                                                                                         
SQL>                                                                                                                                                                     
SQL> spool off
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