How to refres MATERIALIZED view

Guy

We are on the oracle9i database, I created Materialized view and wanted to refres seen helping of below mentioned the package but does not run.

CREATE MATERIALIZED VIEW REFRESH DEPARTMENT_WISE_SALARY FORCE ON REQUEST TO

Select D.DEPTNO, D.DNAME, SUM (E.SAL) SALARY OF EMP E, DEPT. D
WHERE D.DEPTNO = E.DEPTNO
D.DEPTNO GROUP, D.DNAME

Run DBMS_REFRESH. REFRESH ('DEPARTMENT_WISE_SALARY');

But it does not...

Please any idea

Hello

the user this command... Hope, it will help you...: D
Means of materialized view snapshot
c means complete

exec dbms_snapshot.refresh('','C');

concerning
K

Published by: KPR on April 12, 2011 05:24

Tags: Database

Refresh Options

When you define a materialized view, you can specify three update options: how to refresh, what kind of update and can trust constraints be used. If not specified, default values are considered as ON DEMAND , FORCE , and ENFORCED forced respectively.

The two execution modes are ON COMMIT and ON DEMAND . According to the materialized view, you create, some options may be unavailable. Update modes are described in table 8-4 .

Table 8-4 Modes of discount

Refresh the Mode	Description
`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, no 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` ).

http://docs.Oracle.com/CD/B28359_01/server.111/b28313/basicmv.htm#i1006193

How do I know how much the number of materialized view columns

How do I know how much the number of materialized view columns
Thank you
Gopal

Best to include the owner too if you use all_tab_columns

Select count (*)

from all_tab_columns

where owner = "."

and table_name = "."

How to get a materialized view can freshen up after the job is 'broken '.

We have created a materialized view some time ago with the following statement:
create a materialized view SXV_PUB_EMPLOYEE_CERT_ALL_M
full refresh on demand
Start with to_date (August 30, 2009 04:00 ',' dd-mm-yyyy hh24:mi:ss') next trunc (sysdate) + (28/24)
as
Select sxv_emp_cert_all.*
of sxv_employee_certification_all sxv_emp_cert_all;
This week, we found that it had not been updated for about a month
In dba_jobs the broken column was 'Y', next_date time something like 01-01-4000 and failures 16
When I ran it manually by running
DBMS_MVIEW BEGIN. REFRESH ("SXV_PUB_EMPLOYEE_CERT_ALL_M", "C"); END;
I found that one of the columns was too small (probably one of the underlying tables columns had been extended since the creation of the materialized view)
After the correction of what I ussied yesterday (29/08/2013) education:
change the SXV_PUB_EMPLOYEE_CERT_ALL_M materialized view
full refresh on demand
Start with to_date (August 30, 2009 04:00 ',' dd-mm-yyyy hh24:mi:ss') next trunc (sysdate) + (28/24)
After that the table dba_jobs showed me the 04:00 08/30/2013 as the date of the next
I expected to run that night at 04:00, but there is no
last_date column value was still of a month ago, the broken column still shows 'Y '.
and the next date 08/30/2013 04:00 (whereas it would have been set to the 01:00 08/31/2013
Freezes
DBMS_MVIEW BEGIN. REFRESH ("SXV_PUB_EMPLOYEE_CERT_ALL_M", "C"); END;
has given no mistake this time
and in User_Mview_Analysis, the last_refresh_date column showed the time that I had run
No idea how to do the job "unbroken" again for the view refreshes every night?
the database is Oracle Database 10g Release 10.2.0.4.0
Kind regards
Remco

Thanks for all your useful and accurate answers. but finally I found it myself

exec dbms_job.broken (, false);

How to stop refreshing materialized views if the source table is null
any ideas?
Probably not what you were hoping for, but here's a few ideas.

Your account shows - 113 (85 pending)
1. How about helping to keep the forum clean by examining your 85 not resolved previous issues and give credit relatively USEFUL or RESPONDED to those who helped you in the past.

2. read the FAQ at the top right of the page and view information about your system and your software so that we know what you're working with.

3 ask your question in the body of the thread. Don't tell "of ideas.

What is your question? Is this an academic question or you have a real problem that needs to be addressed?

If you have a problem producing the DDL for the materialized view, and information about the type of discount that has been set up for this. Is there a newspaper view materialized on the underlying tables?

The simple answer to your quest is to use UPDATE them on REQUEST and check the base tables before making a manual
a: the best answer depends on what version of Oracle you are using and what is your actual configuration. Are your
MVs in REFRESH GROUPS? Who can make a difference in the response.

How can anyone help with this issue if you do not provide the information needed (FAQ)? Why is - someone MUST help if you show you don't appreciate help in marking questions to which answered once you have helped.

How to fast refresh materialized view parallel

We have Oracle 11.2.0.1 on Redhat 5.2. We use a dozen views fast refresh materialized in our application.
Occasionally refresh MV takes longer than the refresh interval.

One of the ways to improve the performance of refresh MV is to update at the same time, for example

http://www.dba-oracle.com/t_materialized_views_refreshing_performance.htm

- Use parallel DML - Oracle author Michael Armstrong Smith notes "I've done parallel materialized view refreshing
 on tables recently and improved the load times considerably. Rather than having one load which took 2 hours,
 I run 4 parallel loads, one for each partition. The length of time for the whole process is now determined by
 how long the biggest partition takes to load. In my case, this is 40 minutes, with two 30 minute loads and one
 20 minute load.  Overall I am saving 1 hour 20 minutes. I can now add further partitions and do the same thing.
 My only limitation is the parallel loads because I don't have unlimited processing power.
{code} My master tables are not partitioned, but think parallel will still better than non-parallel.

Now the question, how to make refresh parallel. According to the paragraph cited above, Use parallel DML appears doing the job. Can someone  confirm that.

We use {code}
alter materialied view MV_OFFENSE parallel REFRESH FAST start with sysdate next sysdate+ 1/24;
{code}to schedule refresh. Does the parallel clause here parallels query the MV or refresh the MV?

Any other way to make MV refresh parallel?

Thanks

Hello

Just search for * 577870.1*. But before you search, select ID of item in the source list.

Hope this helps.
Best regards
Jean Valentine

How to know that a view is a materialized view or not
Hello

How can we know that a view is materialized view or not...?
y at - there no way to know by querying the database or any other way?
Can someone help me please on this...

Thanks in advance...
In addition to 2 correct answers, you can see the following documentation:

http://www.Oracle.com/pls/db112/to_toc?pathname=server.112/e10820/TOC.htm

It is one of the most important volumes, the reference , which contains the description of all initialization parameters, all V & $ * and all the views DBA that give you access to all the information on objects within your database

Kind regards
Uwe Hesse

http://uhesse.WordPress.com

How to create a complex organization Index Materialized View example
Hello

I have a database 11g that I'm trying to create a complex Materialized View I would make organization Index? How can I specify that I want for a primary key?
CREATE THE RCS_STG MATERIALIZED VIEW. MV_NEXT_HOP_iot
INDEX OF THE ORGANIZATION
AS
SELECT r1.resource_key, resource_key2, r2.resource_full_path_name, device_name, r2.resource_key, device_model,.
service_telephone_number, service_package_name, telephone_number.telephone_number_key, c1.created_on
OF network_resource r1 PARTITION (network_resource_subinterface).
connection c1,
network_resource r2 PARTITION (network_resource_subinterface),
device d1,
tn_network_resource,
telephone_number
WHERE r1.resource_key = c1.resource1_key
AND c1.resource2_key = r2.resource_key
AND d1.device_key = r2.device_key
AND tn_network_resource.resource_key (+) = r2.resource_key
AND telephone_number.telephone_number_key (+) = tn_network_resource.telephone_number_key
UNION ALL
SELECT r2.resource_key, resource_key2, r1.resource_full_path_name, device_name, r1.resource_key, device_model,.
service_telephone_number, service_package_name, telephone_number.telephone_number_key, c1.created_on
OF network_resource r1 PARTITION (network_resource_subinterface).
connection c1,
network_resource r2 PARTITION (network_resource_subinterface),
device d1,
tn_network_resource,
telephone_number
WHERE r1.resource_key = c1.resource1_key
AND c1.resource2_key = r2.resource_key
AND d1.device_key = r1.device_key
AND tn_network_resource.resource_key (+) = r1.resource_key
AND telephone_number.telephone_number_key (+) = tn_network_resource.telephone_number_key
/

I get an error ORA-25175: no PRIMARY KEY constraint found

I want to say resource_key, resource_key2, and service_telephone_number as my primary key?
user12002352 wrote:
I'm not sure I understand your example.

Should I do a create table iot_example in select * from 'my query above.

Would not you other placed in front of the game that you are now (unless you can ETG and specify the index of the Organization, which I think is not the case).

You know the query and the types of data required for the materialized view, you try to create it now. You know you want it impose a primary key constraint.

Take this knowledge and create the table you normally create a table (columns, constraints, etc...) as I showed in my example. And then post your order to create materialized view as you now except use the syntax I have demonstrated to make use of the existing index organized table.

How to understand where are the data in a materialized view, coming from
HI: when I run select NAME, OWNER of dba_mview_refresh_times, I see a number of materialized views. How can I find more information on this view it's source data and fields. The source in a different database table has changed. But the view on my database where the materialized view has not changed. I want to confirm origin of data in this view

TIA
Ravi
Take a look at the column of the QUERY to the DBA_MVIEWS view.

How to get the text of the materialized view?
Hello

How to get test (query) of materialized view?

Thank you
With
the value of 10000 long
set pages 0
DBMS_METADATA. GET_DDL ('MATERIALIZED_VIEW', 'MV_EMP', 'SCOTT');

Of course replace view_name and owner.

How to speed up sqlldr import of a materialized view's base table
Hi all

We have a large base on a warehouse system table.

We charge this table periodically by using SQL * Loader.

The charges are generally 30 minutes and its supported. Recently, we have created a materialized view using this table as a table base (and his newspaper correspondents materialized view) mode to REFRESH FAST .

Now we see that expenses will take much longer muuuch.

We created the view as the ISC documentation, using COUNT (*) columns and refresh mode seems to work. BUT, why is it so slow? Is it possible to speed it up?

Thank you in advance.

Mariano
Spain
Hello

You have all the nonunique indexes or indexes on base tables bitmap? If Yes, you can consider disabling or setting their USUSABLE, and rebuild them after charge, you can also consider using PARALLEL INDICATOR your query mview to speed up, but you need to test this on your system with suitable parallel degrees (No. = 2 CPU, parallel = 2).

The amount of data you load?
Is the partitioned table, if so, then what system is used?
Have you considered materialized view partitioning and using PCT (track changes of partition) to refresh loaded recently loaded partition? the amount of data you have in this table?

Concerning

How to improve the materialized view Refresh speed?
Hello

Are there tips to improve the speed of refresh of the materialized views?
All documentation or advice are appreciated!

Thank you!
Agree with S_Lindenmayr, if possible, the fast refresh should be used to speed up the update because it syncs MV with only the changes since the previous update (instead of the refresh). To implement the Fatst update, fortunately, with 10 g +, Oracle provides a counselor with the TUNE_MVIEW procedure. Step by step to find in week 12 of the Top 20 features the famous Arup Nanda 10 g for the series of DBA http://www.oracle.com/technology/pub/articles/10gdba/week12_10gdba.html

Tarraf

Trigger on the materialized view

Hello
I have the scenario based (Database 11 g):
There is a view materialized (PERSON), which contains the ID and NAME fields. This MV is update daily with a fast refresh.
I have a second array (NAMES), with ID and NORM_NAME. This table contains the name of the person, without special characters.
For example, for recording / * 1 BJORN * / in the PERSON table
I would check * 1 BJORN * / in table NAMES.

Problem is how to fill the NAME table after the filling of the materialized view.
I used a trigger AFTER INSERT or update, as described below, but even if I update the master table (for this purpose, update the MV), I have only to trigger inserts.

Is there a way to implement a trigger "after update" on a materialized view, or do I need another approach?

/*

create or replace TRIGGER TRG_TESTE_MV
AFTER INSERT OR UPDATE ON THE PERSON
REFERENCING OLD AS OLD AGAIN AS NEW
FOR EACH LINE
BEGIN
IF THE INSERTION
INSERT THE NAMES
VALUES
(: NEW.id,:NEW.NAME);
END IF;
IF THE UPDATE CAN
UPDATE OF NAMES
SET NAME =: NEW.NAME WHERE ID =: NEW.id;
END IF;
END;
*/
Thanks for any help

Your trigger fires, but I doubted that you will be satisfied with the results. You really need to understand how to refresh process works before you begin creating triggers of MV:

SQL > create table emp1 in select * from EMP
2.

Table created.

SQL > create materialized view emp1 with rowid journal
2.

Materialized view log that is created.

SQL > create materialized view emp1_mv
2 fast refresh
3 on request
4 with rowid
5 as
6 select * from emp1
7.

Materialized view created.

SQL > create or replace
trigger 2 emp1_mv_biudr
3 before inserting
4 or update
5 or delete
6 on emp1_mv
7 for each line
Start 8
9 insert then dbms_output.put_line ('INSERT' |: new.ename); end if;
10 if the deletion then dbms_output.put_line ('REMOVE' |: old.ename); end if;
11 end;
12.

Trigger created.

SQL > insert
2 in emp1 (empno, ename, sal)
3 values(1,'X',1000)
4.

1 line of creation.

SQL > validation
2.

Validation complete.

SQL > set serveroutput on
SQL > exec dbms_mview.refresh ('emp1_mv', 'f');
INSERTION OF X

PL/SQL procedure successfully completed.

SQL > update emp1
2 set sal = sal + 1
3 where ename ('King', 'JONES')
4.

2 lines to date.

SQL > validation
2.

Validation complete.

SQL > set serveroutput on
SQL > exec dbms_mview.refresh ('emp1_mv', 'f');
INSERTION OF JONES
INSERTION OF KING

PL/SQL procedure successfully completed.

SQL > delete emp1
2 where in ename ('ALLEN', 'SMITH')
3.

2 deleted rows.

SQL > validation
2.

Validation complete.

SQL > set serveroutput on
SQL > exec dbms_mview.refresh ('emp1_mv', 'f');

PL/SQL procedure successfully completed.

SQL >

As you can see, refresh MV updates ever. Results update underlying table to remove/insert in MV. That's why your trigger will not give the results that you expected.

SY.

How to refres MATERIALIZED view

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