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  • [Oracle整理]Trigger失效

    说明:本内容是工作用到的知识点整理,来自工作中和网络。
    代码于Oracle9上测试。

    Trigger失效

    经常发现系统里的Trigger失效(all_objects.status='INVALID'并且all_triggers.status='ENABLED'

    失效原因

    涉及的一些表或者其它对象被删除或者其它操作(DDL),这时你需要重新编译或重建。所以,严密周到还是配有相应文档。举一个例子,Test1表(NUM, CREATEDATE),有一个insert触发器,alter table Test1 add(a);那触发器变为失效,要重新创建。clip_image002

    同样,删除字段也会失效。

    同样,修改字段的类型(Type)也会失效。

    查看Trigger状态

    -- 有是否有效的状态(INVALID/VALID)

    select * from all_objects o

    where o.object_type='TRIGGER'

    AND o.object_name in ('WRITE_BACK_RCL_DETAIL_F137','WRITE_BACK_RCL_DETAIL_F138')

    -- 有是否启用的状态(DISABLED/ENABLED)

    select * from all_triggers t

    where t.trigger_name in ('WRITE_BACK_RCL_DETAIL_F137','WRITE_BACK_RCL_DETAIL_F138')

    -- 启用,但是失效了

    select o.owner,o.object_name,o.status as is_VALID,t.trigger_type,t.table_name,t.column_name,t.status as is_ENABLED

     from all_objects o,all_triggers t

    where o.object_name=t.trigger_name

    and o.status='INVALID'

    and t.status='ENABLED'

    clip_image004

    重新编译Trigger

    1手动编译

    ALTER   TRIGGER Test1_trg   COMPILE

    2自动编译

    1dbms_utility.compile_schema(‘user’,false);调用这个过程就会编译所有失效的过程、函数、触发器、包。dbms_utility.compile_schema参数:

    clip_image006

    2)自动失效的对象,一般会在下次调用的时候,被重新编译通过,所以不需要人工干预

    3定时编译

    --创建自动编译失效过程事务记录表

    declare

      tabcnt integer := 0;

    begin

      select count(*) into tabcnt from dba_tables where table_name='RECOMPILE_LOG';

      if tabcnt = 0 then

        execute immediate 'create table recompile_log(rdate date,errmsg varchar2(200))';

      end if;

    end;

    /

    --创建编译失效对象的存储过程

    create or replace procedure recompile_invalid_objects 

    as

      str_sql varchar2(200);  --中间用到的sql语句

      p_owner varchar2(20);   --所有者名称,即SCHEMA

      errm varchar2(200);     --中间错误信息

    begin

      /*****************************************************/

      p_owner := 'owner';/***用户名*************************/

      /*****************************************************/

      insert into recompile_log(rdate, errmsg) values(sysdate,'time to recompile invalid objects');

     

      --编译失效存储过程

      for invalid_procedures in (select object_name from all_objects

        where status = 'INVALID' and object_type = 'PROCEDURE' and owner=upper(p_owner))

      loop

        str_sql := 'alter procedure ' ||invalid_procedures.object_name || ' compile';

        begin

          execute immediate str_sql;

        exception

          When Others Then

          begin

            errm := 'error by obj:'||invalid_procedures.object_name||' '||sqlerrm;

            insert into recompile_log(rdate, errmsg) values(sysdate,errm);

          end;

        end;

      end loop;

     

      --编译失效函数

      for invalid_functions in (select object_name from all_objects

        where status = 'INVALID' and object_type = 'FUNCTION' and owner=upper(p_owner))

      loop

        str_sql := 'alter function ' ||invalid_functions.object_name || ' compile';

        begin

          execute immediate str_sql;

        exception

          When Others Then

          begin

            errm := 'error by obj:'||invalid_functions.object_name||' '||sqlerrm;

            insert into recompile_log(rdate, errmsg) values(sysdate,errm);

          end;

        end;

      end loop;

      --编译失效包

      for invalid_packages in (select object_name from all_objects

        where status = 'INVALID' and object_type = 'PACKAGE' and owner=upper(p_owner))

      loop

        str_sql := 'alter package ' ||invalid_packages.object_name || ' compile';

        begin

          execute immediate str_sql;

        exception

          When Others Then

          begin

            errm := 'error by obj:'||invalid_packages.object_name||' '||sqlerrm;

            insert into recompile_log(rdate, errmsg) values(sysdate,errm);

          end;

        end;

      end loop;

     

      --编译失效类型

      for invalid_types in (select object_name from all_objects

        where status = 'INVALID' and object_type = 'TYPE' and owner=upper(p_owner))

      loop

        str_sql := 'alter type ' ||invalid_types.object_name || ' compile';

        begin

          execute immediate str_sql;

        exception

          When Others Then

          begin

            errm := 'error by obj:'||invalid_types.object_name||' '||sqlerrm;

            insert into recompile_log(rdate, errmsg) values(sysdate,errm);

          end;

        end;

      end loop;

      --编译失效索引

      for invalid_indexs in (select object_name from all_objects

        where status = 'INVALID' and object_type = 'INDEX' and owner=upper(p_owner))

      loop

        str_sql := 'alter index ' ||invalid_indexs.object_name || ' rebuild';

        begin

          execute immediate str_sql;

        exception

          When Others Then

          begin

            errm := 'error by obj:'||invalid_indexs.object_name||' '||sqlerrm;

            insert into recompile_log(rdate, errmsg) values(sysdate,errm);

          end;

        end;

      end loop;

      --编译失效触发器

      for invalid_triggers in (select object_name from all_objects

        where status = 'INVALID' and object_type = 'TRIGGER' and owner=upper(p_owner))

      loop

        str_sql := 'alter trigger ' ||invalid_triggers.object_name || ' compile';

        begin

          execute immediate str_sql;

        exception

          When Others Then

          begin

            errm := 'error by obj:'||invalid_triggers.object_name||' '||sqlerrm;

            insert into recompile_log(rdate, errmsg) values(sysdate,errm);

          end;

        end;

      end loop;

     

    end;

    /

    --创建任务计划,每天早上8点整执行该任务,且保证此任务有且只有一个

    declare

      jobcnt integer :=0;

      job_recompile number := 0;

      str_sql varchar2(200);

    begin

      select count(*) into jobcnt from all_jobs where what = 'recompile_invalid_objects;' and broken = 'N';

      if jobcnt > 0 then

        for jobs in (select job from all_jobs where what = 'recompile_invalid_objects;' and broken = 'N')

        loop

          str_sql := 'begin dbms_job.remove('||jobs.job||'); end;';

          begin

            execute immediate str_sql;

          exception

            When Others Then null;

          end;

        end loop;

      end if;

      --创建任务计划

      dbms_job.submit(job_recompile,'recompile_invalid_objects;',sysdate,'TRUNC(SYSDATE + 1) + 8/24');

      --启动任务计划

      dbms_job.run(job_recompile);

    end;

    /

    网友对上面PROCEDURE的评论:
    楼主的想法是好的,但过程太过复杂,
    1oracle提供了自动编译的接口
    dbms_utility.compile_schema(user,false);
    调用这个过程就会编译所有失效的过程、函数、触发器、包。
    2)自动失效的对象,一般会在下次调用的时候,被重新编译通过,所以不需要人工干预。
    3自动编译所有的过程还可以,但我觉得重建索引……

    调试触发器

    平时用PL/SQL调试PROCEDURE,右键点击PROCEDURETest选项。而Trigger没有,可以建立一个测试存储过程,执行到可以触发触发器的SQL时,断点跟入Step Into便可进入触发器。

    学习数据

    1)  http://topic.csdn.net/u/20110111/10/7b9a9e0c-5708-4146-b210-4f0d1e2f0fcd.html

    2)  http://zhouwf0726.itpub.net/post/9689/194221

    3)  http://www.cnblogs.com/kerrycode/archive/2009/10/15/1582807.html

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  • 原文地址:https://www.cnblogs.com/htht66/p/2330977.html
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