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  • oracle11g rename user导致物化视图失效的处理

    在上一篇文章中,已经点到了数据库改名时,引起该schema下物化视图会失效的问题。从表面上看,该物化视图是删也删不掉,那当然就无法重建了。以下是实验过程:

    Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production

     SQL> conn yyf123/yyf123
     SQL> select s.owner,s.object_name,s.object_type,status from dba_objects  s  where object_name='EMP' ;
    OWNER       OBJECT_NAME     OBJECT_TYPE STATUS
    ------------------------------ -----------------------------------------------------------
    SCOTT EMP  TABLE VALID
    SCOTT       EMP     MATERIALIZED VIEW   VALID
    YYF123 EMP  TABLE VALID
    YYF123       EMP     MATERIALIZED VIEW   INVALID

    SQL> drop table emp purge;
    ERROR at line 1:
    ORA-12083: must use DROP MATERIALIZED VIEW to drop "YYF123"."EMP"

    SQL> drop materialized view emp;
    Materialized view dropped.

    既然提示已经删除了物化视图,那尝试着重建一下看看

    SQL>CREATE MATERIALIZED VIEW  emp
    ON PREBUILT TABLE
    REFRESH FORCE ON DEMAND
    START WITH sysdate  NEXT SYSDATE + 10/1442 
    as
    SELECT * FROM emp@link_to_scott;
    *
    ERROR at line 1:
    ORA-00955: name is already used by an existing object

    虽然上面删除物化视图的命令已经成功执行,但是请看dba_objects里面还有记录,也就是说并没有真正的删除。

    select s.owner,s.object_name,s.object_type,status from dba_objects  s  where object_name='EMP' ;
    OWNER       OBJECT_NAME     OBJECT_TYPE STATUS
    ------------------------------ ------------------------------ ------------------- ----------
    YYF123       EMP     TABLE VALID
    YYF123       EMP     MATERIALIZED VIEW   INVALID

    问题来了,就是因为存在对该物化视图的summary信息

    SQL> select t.owner,t.summary_name,t.container_owner,t.container_name from dba_summaries t where owner='YYF123' ;
    OWNER       SUMMARY_NAME     CONTAINER_OWNER    CONTAINER_NAME
    ------------------------------ ------------------------------ ------------------------------ ------------------------------
    YYF123       EMP     YYF123    EMP
    SQL> conn / as sysdba
    SQL> drop summary yyf123.emp;    <------------这就是解决问题的关键

    接下来验证下是否已经清楚

    SQL> select t.owner,t.summary_name,t.container_owner,t.container_name from dba_summaries t where owner='YYF123' ;
    no rows selected

    SQL>CREATE MATERIALIZED VIEW  emp
    ON PREBUILT TABLE
    REFRESH FORCE ON DEMAND
    START WITH sysdate  NEXT SYSDATE + 10/1442 
    as
    SELECT * FROM emp@link_to_scott;

    Materialized view created.
    SQL> select count(*) from emp;

      COUNT(*)
    ----------
    14

     SQL> exec dbms_mview.refresh('emp','c

    PL/SQL procedure successfully completed.

    到此为止,已经顺利解决。

    reference:

    http://dba.stackexchange.com/questions/4235/why-in-oracle-11gr2-i-cant-drop-the-materialized-view-with-the-same-user-that-c

    DBA_SUMMARIES is 'Description of the summaries accessible to dba';
    DBA_SUMMARIES.OWNER is 'Owner of the summary';
    DBA_SUMMARIES.SUMMARY_NAME is 'Name of the summary';
    DBA_SUMMARIES.CONTAINER_OWNER is 'Owner of the container table';
    DBA_SUMMARIES.CONTAINER_NAME is 'Name of the container table for this summary';
    DBA_SUMMARIES.LAST_REFRESH_SCN is 'The SCN of the last transaction to refresh the summary';
    DBA_SUMMARIES.LAST_REFRESH_DATE is 'The date of the last refresh of the summary';
    DBA_SUMMARIES.REFRESH_METHOD is 'User declared method of refresh for the summary';
    DBA_SUMMARIES.SUMMARY is 'Indicates the presence of either aggregation or a GROUP BY';
    DBA_SUMMARIES.FULLREFRESHTIM is 'The time that it took to fully refresh the summary';
    DBA_SUMMARIES.INCREFRESHTIM is 'The time that it took to incrementally refresh the summary';
    DBA_SUMMARIES.CONTAINS_VIEWS is 'This summary contains views in the FROM clause';
    DBA_SUMMARIES.UNUSABLE is 'This summary is unusable, the build was deferred';
    DBA_SUMMARIES.RESTRICTED_SYNTAX is 'This summary contains restrictive syntax';
    DBA_SUMMARIES.INC_REFRESHABLE is 'This summary is not restricted from being incrementally refreshed';

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  • 原文地址:https://www.cnblogs.com/yiyuf/p/4103915.html
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