fast refresh on MATERIALIZED VIEW

Similar Questions

• Refresh the Materialized View constructed from an external table commit?

  Is it possible to create a materialized with Refresh view on commit built from an external table?
  
  I think the answer is "no, because there is no way for the outer table report to the view materialized it has been changed," but I would like to be sure before I tell my client who has requested the opportunity to do this (or, Alternatively, to learn how Oracle hoops I have to cross in order to operate).
  
  I can create a Refresh on demand, it is not a question of not having the necessary permissions to create the materialized view itself.

  No, you can't. The outer table is not modified in a transactional way and there no materialized view logs, so there is no event to hang in and no delta to apply.

  However, you can use dbms_scheduler observer file that will ask for the presence of a file and load the data in a table or refresh a materialized view based on the external table.

  Justin

• refresh the materialized view, but skip delete

  I have a main table named DATA with mview log created on this subject.
  
  DATA_MVIEW is created in the select * data.
  
  For some reason, I want to update DATA_MVIEW every hour, but to only UPDATE/INSERT, skip DELETE action.
  
  A way to achieve that is to write additional code:
  1 detect records looking into MLOG$ _DATA (Journal mview) worth $$ DMLTYPE is D.
  2. pull these records in a separate temporary table.
  3 Refresh DATA_MVIEW
  4. Insert the records from the temporary table in DATA_MVIEW.
  
  My question is "is there a better, simpler way to ignore DELETE them when updating MVIEW?
  
  Thank you very much and waiting for tips Rewards points!

  There is another convoluted option:
  1. create an ON DELETE trigger on the DATA table that copies each line removed in a shadow / historical table
  2 update the MV
  3. create a view (not a MV) which is a Union All of the table shadow history with the MV
  4 refer to this view when you want to that 'all', the MV lines when you want 'alone that does not exist' reference lines

  Of course, if your MV is equipped with filters (WHERE clause) that is defined as a subset of the DATA table, you must also check that the shadow/history table also applies the same filters so that it fits with the MV.

  Hemant K Collette

• Creation of privilege to write to the database master materialized view?

  I would like to create materialized views for a few tables of a production Oracle database replication. I have only read access to the source database. I think I need additional privileges to create the journal for the quick update. Is this correct? Have no option if I can't get additional privileges and cannot get a DBA to help me?

  If you need to fast refresh to materialized view log, you will need help of DBA.

  Otherwise, you need to create complete refresh Mviews.

• Materialized view conducive to fast refresh method

  In AWM when I select refresh FASTER method and select the materialized view, get the error below:
  "Quick Refresh method requires the materialized view logs and a complete refresh previously run the MV cube." I need this fast a cube materialized view refresh, so that it performs an incremental refresh and re-aggregation of only the changed lines in the source table.
  can someone help me on this?

  Remember to choose the 'Force' that runs fast if possible update, as otherwise it performs a complete refresh. You can also specify Complete as the Refresh method in the dialog box Assistant Maintenance first, you keep the cube.

  You'll need create materialized on all the base tables, view logs if you have not already done so, otherwise the cube will be able to do a fast refresh (differential).

• Fast refresh materialized view problems

  I have two databases (A and B).
  
  In A database, user NICK has a table called COLOUR_MASTER.
  Also in this database, NICK issues creating materialized command newspaper view colour_master with the primary key, including the new values (and Yes, there is a primary key defined for this table)
  In database B, there is a link of database called A_LINK, connect, Nick, identified by password using 'dbA ';
  In database B, user IAN also creates a materialized view CM_MV cool off quickly in select * from colour_master@A_LINK
  
  This statement is done correctly, and there are several million lines in CM_MV when it's done.
  
  Immediately, IAN issued this command:
  
  Start
  dbms_mview. Refresh ('CM_MV');
  end;
  
  .. .and after a small pause, it gets the error
  
  ORA-12008: error path refresh materialized view
  ORA-02068: following sever error of A_LINK
  ORA-03113: end of file on communication channel
  
  One more + "select count (*) of colour_master@A_LINK" + subject immediately manages to return the correct number of records in the database so A 3113 is a bit misleading, I think that, in this case have crash, the database remains accessible at all times, there is no network problem (database A and B are both located in the same server so it of not like I'm trying of) connect to halfway around the globe).
  
  The only thing I can think is that there is a permissions issue causes this error. The creation of MV because is made via a link, it is not a problem of IAN see all appropriate, but once the updates come into play, it is perhaps.
  
  Any who can shed light on why I can't do the fast refresh from the view, I can create joyfully, please?

  I'm surprised no one asked you to do what is obvious: try to do a select * from colour_master@A_LINK, without that being wrapped in a create materialized MATERIALIZED view. Just do a simple select * from...

  My bet is that you will get an error ORA_22992 can not use selected from the remote tables LOB Locators . And if you can't do a simple select * in a remote table, I suspect that you can reasonably expect Fireworks when you try to create or refresh a view materialized on such a thing!

  Here's a quick test:

  In the 1 database:
  =========

  SQL> create table A (col1 varchar2(2), col2 clob);
  Table created.
  
  SQL> alter table A add constraint A1 primary key (col1);
  Table altered.
  
  SQL> insert into A values ('AA','This is an entry into a clob column');
  1 row created.
  
  SQL> commit;
  Commit complete.
  
  SQL> create materialized view log on A with primary key including new values;
  Materialized view log created.
  

  In the database 2
  =========

  SQL> connect ims_global/v0yager1@ussd
  Connected.
  
  SQL> create materialized view B refresh fast as
    2  select * from A@remotedb_link;
  
  Materialized view created.
  
  SQL> exec dbms_mview.refresh('B');
  BEGIN dbms_mview.refresh('B'); END;
  
  *
  ERROR at line 1:
  ORA-12008: error in materialized view refresh path
  ORA-02068: following severe error from REMOTEDB_LINK
  ORA-03113: end-of-file on communication channel
  ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2251
  ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2457
  ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2426
  ORA-06512: at line 1
  
  SQL> drop materialized view B;
  Materialized view dropped.
  
  SQL> create materialized view B refresh fast as
    2  select col1 from A@ims_link;
  
  Materialized view created.
  
  SQL> exec dbms_mview.refresh('B');
  PL/SQL procedure successfully completed.
  

  Which seems to reproduce your problem rather well, I think.

  I don't know if there is no work around for this. I mean, obviously you can't miss the CLOB column in your statement of 'create a MV' as I just did, but I don't know if you're still allowed or expected to be able to create a MV on lob columns and that such and such correction will allow you to do. Maybe someone else can provide this information.

  But at least you won't have to play Russian roulette with your init.ora parameters!

• Materialized views Refresh method and refresh option

  Hi Experts,

  According to the docs, If the MV contains the following, MV is considered complex. I wonder is there any view data dictionary that indicates the type of MV? Because is very easy to the candidate a complex type mv. Because many queries contains the properties below.

  http://docs.Oracle.com/CD/B28359_01/server.111/b28326/repmview.htm#i52501

  http://docs.Oracle.com/CD/B28359_01/server.111/b28313/basicmv.htm

  Specifically, a materialized view is considered complex if the materialized view definition query contains:

  • A CONNECT BY clause
  • An INTERSECT , MINUS , or UNION ALL operation
  • he DISTINCT or UNIQUE keyword
  • In some cases, an aggregate function, although it is possible to have an aggregation function in the query definition and always have a simple materialized view
  • In some cases, joins other than those in a subquery, although it is possible to have joins in the definition to interrogate and still have a simple materialized view
  • In some cases, a UNION operation

  
  

  After that I kept going to read that I learned that when a VM is created, the refresh mode is specified according to the type of the MV. That means, using ON-DEMAND refresh mode is widespread. The documentation mentions that there isa also refresh option. My question is, is it possible to specify

  ON REQUEST and FAST together?

  Also, what are the differences between FULL and FAST. Ends truncate the table and fill it up again?

  ON COMMIT

  Refresh product automatically when a transaction which changed one of the paintings of the materialized view's retail is committed. This can be specified as the materialized view is quickly updatable (in other words, not complex). The ON COMMIT privilege is required to use this mode.

  ON DEMAND

  Refresh occurs when a user manually executes one of the procedures available refresh contained in the DBMS_MVIEW package ( REFRESH , REFRESH_ALL_MVIEWS , REFRESH_DEPENDENT ).

  COMPLETE	Refreshes and recalculating the materialized view query definition.
  FAST	Applies incremental changes to refresh the materialized view using the information recorded in the papers of the materialized view, or an SQL * Loader direct-path access or a partition maintenance operation.

  FORCE

  Applies FAST update if possible; otherwise, it applies COMPLETE Refresh.

  NEVER

  Indicates that the materialized view will not be updated with updating mechanisms.

  Select * from version of v$.

  Oracle Database 11 g Release 11.2.0.4.0 - 64 bit Production

  Thank you

  Çaglar wrote:

  ...

  Also, what are the differences between FULL and FAST. Ends truncate the table and fill it up again?

  ...

  Thank you

  I just want to answer the truncated question. Seems that nobody covered that yet.

  Answer: It depends.

  If you do a full refresh, then the default is to use ATOMIC_REFRESH = TRUE.

  This means that the update is done via an insert, delete , and ... Select.

  You can change it to ATOMIC_REFRESH = FALSE (parameter dbms_mview.refresh).

  This means that is a TRUNCATE and insert a ... Select with APPEND peak (path direct insert).

  Refresh if Atomic = FALSE is considerably faster than the default. Also way less Archives of newspapers are written.

  The downside is however that, during the update the MV is empty, is no longer an atomar operation!

  See also Oracle documentation: http://docs.oracle.com/cd/B28359_01/appdev.111/b28419/d_mview.htm#i997194

• Materialized view - REFRESH to CLERK a mistake

  I'm changing the mode to refresh a materialized view ON demand to COMMIT ON and I get an error:
  
  Error in the command line: 4 column: 9
  Error report:
  SQL error: ORA-12054: cannot set the attribute ON COMMIT refresh for the materialized view
  12054 00000 - "cannot set the refresh attribute COMMIT for the materialized view.
  * Cause: The materialized view did not meet the conditions for release at the time.
  * Action: Specify only valid options.
  
  The original DDL is
  
  --------------------
  CREATE THE TEST_MV MATERIALIZED VIEW
  REFRESH THE STRENGTH TO DEMAND
  LIKE SOME a.field1, MAX (DECODE (a.field2, 1, field3, NULL)) lbl
  FROM (SELECT field1, Field2, field3 FROM table_source GROUP BY Field1, Field2, field3) a
  GROUP BY a.field1;
  --------------------
  
  and I tried
  
  --------------------
  CREATE THE TEST_MV MATERIALIZED VIEW
  REFRESH FORCE THE COMMIT
  LIKE SOME a.field1, MAX (DECODE (a.field2, 1, field3, NULL)) lbl
  FROM (SELECT field1, Field2, field3 FROM table_source GROUP BY Field1, Field2, field3) a
  GROUP BY a.field1;
  --------------------
  
  WITH ROWID option
  
  How can I change the mode of a materialized view Refresh?
  
  Thank you.

  His 10g (10.2)

  10.2.?. ?

  You probably use a wrong syntax to pass through. Try using something like the following. I changed the query to use Scott emp and dept tables. You can pass your own tables and queries using them.

  VARIABLE task_cust_mv VARCHAR2(30);
  VARIABLE create_mv_ddl VARCHAR2(4000);
  EXECUTE :task_cust_mv := 'cust_mv';
  
  EXECUTE :create_mv_ddl := 'CREATE MATERIALIZED VIEW cust_mv REFRESH FAST DISABLE QUERY REWRITE AS SELECT e.empno, d.deptno, SUM(e.sal) sum_amount FROM scott.emp e, scott.dept d WHERE e.deptno = d.deptno GROUP BY d.deptno,e.empno ';
  
  EXECUTE DBMS_ADVISOR.TUNE_MVIEW(:task_cust_mv, :create_mv_ddl);
  

  I am that running on 11106 on Win xp professional SP 2.

  HTH
  Aman...

• Monitoring materialized view refresh mode.

  Hello
  
  How can I tell if a mview (which was created with REFRESH FORCE) is being updated using quick or full mode?
  Are there any v$ or similar, where I can see this info?
  
  Oracle 10.2.0.3 is
  
  Thanks in advance.

  Hello

  Select LAST_REFRESH_TYPE in the ALL_MVIEWS. This field contains the following information:

  Method used for the most recent update:

  -COMPLETE - last update has completed
  -FAST - most recent update was fast (incremental)
  -NA - materialized view don't have not yet been updated (for example, if it was created to DEFERRED payment)

  Select last_refresh_type
  from all_mviews
  where owner = 'XXXX'
  and mview_name = 'XXXXXX'
  and refresh_method = 'FORCE';
  

  Have a look here for more details:

  -http://download-uk.oracle.com/docs/cd/B19306_01/server.102/b14237/statviews_1105.htm#i1582466

  See you soon,.

  Francisco Munoz Alvarez
  http://www.oraclenz.com

• Run job/refresh materialized view at the moment!

  Hello
  
  What is the best use of method you when I want to execute a task that will refresh a materialized view.
  
  When the user clicks on a button, I want to refresh the materialized view next day at 01:00. Only once.
  
  Please suggest me the best methods to achieve this. Thanks in advance.
  
  
  Kind regards
  Igor

  Create a job.

  DECLARE
  v_job NUMBER;
  BEGIN
  dbms_job. Submit (-online v_job, what => employment ' BEGIN dbms_mvew.refresh (list of-online "schema.mv_name" method => "F");) END;', start_date-online trun (sysdate + 1) + 1/24);
  COMMIT;
  END;
  /

• Refresh of the materialized view; Process flow

  I was wondering if anyone has used process flow to refresh the materialized view.
  
  I'm trying to use a process flow for it, either run something similar to below
  EXECUTE Dbms_refresh.Refresh ('"ODW_SRC".) "MV_SERVICE_DAILY_AUDIT" ');
  
  I try to avoid using the Scheduler of DB because I want to make sure that the process flow is not conflict with the update of a materialized view possible cause conflict more execution time of the work expected will refresh window.
  
  I guess I could use a transformation and build. but I was wondering if there is an easier way in the execution of it just line... an idea
  
  Thanks in advance for your help

  Sorry, I think that the term OWB is post mapping process, its actually an operator in an OWB mapping where you can add a procedure for example call. The procedure can do pretty much what he wants.

  See you soon
  David

• How to refresh materialized views

  I'm following the steps to migrate a 12.0.6 financials database to OATM (model Tablespace Oracle Applications). One of the steps say to "perform a refresh all materialized views complete." This step is not part of the Oracle OATM utility. I wasn't able to find much on Metalink on this one. How to achieve this? Thank you... Colin

  Colin,

  See Note: 391483.1 - how to refresh materialized views after migration to the model OATM
  https://metalink2.Oracle.com/MetaLink/PLSQL/ml2_documents.showDocument?p_database_id=not&P_ID=391483.1

• View materialized, ORA-12008: error in the path of refresh materialized view

  I want to refresh a materialized view, but I get an error ORA-12008.
  Does anyone have an idea? I can't find any errors in my update statement.
  

  CREATE MATERIALIZED VIEW scott.dummy_mv
    TABLESPACE test
    BUILD IMMEDIATE
    USING INDEX TABLESPACE idx_test
    REFRESH 
       START WITH sysdate 
       NEXT ROUND(SYSDATE)+5/24          
       WITH PRIMARY KEY
    ENABLE QUERY REWRITE
    AS
    SELECT KM.ID ID
            ,KM.USERNAME USERNAME
         ,KM.ABTID ABTID     
    FROM my_table KM
  /
  
  scott@orcl>desc dummy_mv
   Name                                      Null?    Typ
   ----------------------------------------- -------- ----------------------------
   ID                                        NOT NULL NUMBER(4)
   USERNAME                                  NOT NULL VARCHAR2(30)
   ABTID                                     NOT NULL NUMBER(4)
  
  scott@orcl>
  
  
  BEGIN 
    SYS.DBMS_JOB.REMOVE(6579);
  COMMIT;
  END;
  /
  
  DECLARE
    X NUMBER;
  BEGIN
    SYS.DBMS_JOB.SUBMIT
    ( job       => X 
     ,what      => 'dbms_refresh.refresh(''"scott"."dummy_mv"'');'
     ,next_date => to_date('07.01.2009 05:00:00','dd/mm/yyyy hh24:mi:ss')
     ,interval  => 'ROUND(SYSDATE)+5/24              '
     ,no_parse  => FALSE
    );
    SYS.DBMS_OUTPUT.PUT_LINE('Job Number is: ' || to_char(x));
  COMMIT;
  END;
  /
  
  scott@orcl>exec dbms_refresh.refresh('dummy_mv');
  BEGIN dbms_refresh.refresh('dummy_mv'); END;
  
  *
  FEHLER in Zeile 1:
  ORA-12008: error in materialized view refresh path
  ORA-00947: not enough values
  ORA-06512: in "SYS.DBMS_SNAPSHOT", Zeile 820
  ORA-06512: in "SYS.DBMS_SNAPSHOT", Zeile 877
  ORA-06512: in "SYS.DBMS_IREFRESH", Zeile 683
  ORA-06512: in "SYS.DBMS_REFRESH", Zeile 195
  ORA-06512: in Zeile 1
  
  scott@orcl>

  dealer says:
  I get the same error:

  scott@orcl>exec dbms_mview.refresh('dummy_mv','c');
  BEGIN dbms_mview.refresh('dummy_mv','c'); END;
  
  *
  FEHLER in Zeile 1:
  ORA-12008: error in materialized view refresh path
  ORA-00947: not enough values
  ORA-06512: in "SYS.DBMS_SNAPSHOT", Zeile 820
  ORA-06512: in "SYS.DBMS_SNAPSHOT", Zeile 877
  ORA-06512: in "SYS.DBMS_SNAPSHOT", Zeile 858
  ORA-06512: in Zeile 1
  

  I would first check "request" from the view of the DBA_SNAPSHOTS/DBA_MVIEWS dictionary information, if it reveals something obvious.

  But it looks more like an internal error when processing the update. You can get more information on the follow-up to the session error. "Alter session set sql_trace = true;" before running the update should be sufficient. Then unplug and check the trace file generated error using "tkprof" and check the output or by searching manually "err =" in the trace file.

  What 4 numbers of Oracle version do you use?

  Kind regards
  Randolf

  Oracle related blog stuff:
  http://Oracle-Randolf.blogspot.com/

  SQLTools ++ for Oracle (Open source Oracle GUI for Windows):
  http://www.sqltools-plusplus.org:7676 /.
  http://sourceforge.NET/projects/SQLT-pp/

• What is the desertion of orderly materialized view with MLOG$.

  I have 11.2.4.0 Oracle enterprise edition.

  I want to remove completely the MATERIALIZED view and MATERIALIZED view logs.

  
  

  I need to do this on a production of databases.

  
  

  It's the right order?

  Thank you.

  You can drop the materialized view log first, then the materialized views.

  Because when you drop a materialized view log is therefore more available to fast refresh, however, it is available to rewrite, so drop materialized view log first, then materialized views. Additional information provided below may help Doc Oracle.

  If you delete a simple materialized view that is the least recently refreshed materialized view of a main table, then the database automatically purges the materialized master table see only connect the required lines to refresh the materialized view has fallen.

  If you delete a materialized view that was created on a predefined table, then the database removes the materialized view, and table preconstruitse returns to his identity in a table.

  When you delete a master table, the database does not automatically drop the materialized views based on the table. However, the database returns an error when it tries to refresh materialized view based on a main table that has been abandoned.

  If you delete a materialized view, then all the compiled queries that have been rewritten to use the materialized view will be invalidated and recompiled automatically. If the materialized view was preconstruitse on a table, then the table is not deleted, but it can no longer be maintained by the materialized view refresh mechanism.

• Drop Materialized view in peoplesoft

  Hello

  I have a requirement in which I am refreshing a materialized view.

  I created a table, and in my sql, I have a statement

  DROP THE PS_FZZZ_PSQ_ACC_MV MATERIALIZED VIEW;

  But when I run it I get an error like below

  Position of the error: 0 return: 12003 - ORA-12003: materialized view "SYSADM". "" PS_FZZZ_PSQ_ACC_MV ".

  There is no SQL failed stmt:DROP MATERIALIZED VIEW PS_FZZZ_PSQ_ACC_MV

  30108778 ABENDED to step FZGL_ACCESS process. PRINCIPAL. MV_DROP (SQL) - RC = 12003 (108 524)

  Why drop the materialized view to refresh it?

  See this doc on the updating of the snapshots:

  Refresh of the materialized views - an overview (Doc ID 889342.1)

  AFAIK materialized views are supported non-PeopleSoft objects.

  Since they are not part of PeopleTools metadata, you can use that specific database through the call objects SQLExec of SQL procedures.

  CLARRIFICATION about M - VIEW (Doc ID 987449.1)

  You can try to create a step PeopleCode in your AE and run the command

  SQLExec ("PS_FZZZ_PSQ_ACC_MV DROP MATERIALIZED VIEW ;");

  or create a SQL step and add the drop statement a PLSQL blok

  BEGIN

  RUN IMMEDIATELY "DROP MATERIALIZED PS_FZZZ_PSQ_ACC_MV VIEW ';

  END;