Will it make any sense to create materialized view on top of a MOLAP cube?

Hi,
We have developed few MOLAP cubes for our reporting environment.
Now we are planning to create materialized with query rewrite enabled for faster performance?
Is this a correct approach? Will it make any sense? I mean will i get any performance improvement if i create MV on top of a MOLAP cube?
Thanks and Regards,
Padmanabh

Adding a rewrite MV does not change the raw performance of a cube. The only reason to add one is if you want to write your SQL queries against the base relational tables and have the database rewrite your queries against the cube. If you are able to query the cube views directly, then there is no particular benefit to a rewrite MV.
Adding a refresh-only MV does have benefits even if your queries use the cube views. A refresh-only MV tracks the staleness of the cube and lets you run 'fast' refreshes, which can be useful if you are only modifiying a handful of rows in your fact table.

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HI,
Is there any difference between create materialized view log on and creat snapshot on.
Did some googling, found out that: A snapshot log is a table associated with
the master table of a snapshot and Is used for refresh the master table\'s snapshots.
Materialized view log is a table associated with the master table of a materialized view. Seem like the same.
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regards,
becks

Where did you pick up this syntax from ?
The MV Log that will be created on DOCUMENT will be called MLOG$_DOCUMENT.
So, the correct syntax is :
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AS
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FROM
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When you ran the select statement, were you connected as the same user that you used to try to enable the MVs?
Can you create a standard (non cube) MV with the same select statement? (Connected as the same user you used in AWM.)
"CREATE MATERIALIZED VIEW "TABLESPACE"."MV_TEST"
BUILD DEFERRED
REFRESH ON DEMAND
FORCE
USING TRUSTED CONSTRAINTS
AS
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FROM
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GROUP BY
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Hello to all
I want create read only materialized view replication environment two of our tables have LONG datatype when i create materialized view against on them
I recieve this error message
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SQL Error: ORA-00997: illegal use of LONG datatype
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thanks

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RETURN VARCHAR2
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v_long VARCHAR2(32767) ;
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INTO v_long
FROM MDB.TOAD_PLAN_TABLE
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EXCEPTION
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IF SQLCODE = '-01406' THEN
NULL ;
ELSE
RAISE ;
END IF ;
END ;
RETURN SUBSTR(v_long,1,4000) ;
END ;
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Hi,
I hope this is not very far fetched idea.
I have a very complex view and I would like to replicate it 'in place' that is I would like to make a materialized view that is based on this view complex view. I would like to use this materialized view (i.e table) to query data instead of using the original view, since it takes Oracle some 10-15 seconds to execute my query on the original view and I am not allowed to create indexes on most of the tables that are included in the original view.
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I would like to create a materialized view on user scott@orcl for user colinsuper. User scott@orcl have
"CREATE ANY MATERIALIZED VIEW" permissions. Why does I get an ORA-00942 error?
Remote-Database: remote_orcl.world
Remote-Database-User: lindasuper
Remote-Database-Table: cars
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2 /
Synonym created.
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2 where rownum <= 1;
cno   cbez
3     32-mxl
scott@orcl
scott@orcl
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2    TABLESPACE my_tablespace
3    BUILD IMMEDIATE
4    USING INDEX TABLESPACE my_idx
5    REFRESH
6       START WITH sysdate
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9    ENABLE QUERY REWRITE
10    AS
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12           car_bez cbez
13    FROM cars
14 /
CREATE MATERIALIZED VIEW colinsuper.CARS_MV
FEHLER in Zeile 1:
ORA-00942: Tabelle or View does not exist
scott@orcl>
scott@orcl>
scott@orcl>When I am creating the materialized view without the user colinsuper, materialized view
is creating without problems.
scott@orcl>CREATE MATERIALIZED VIEW CARS_MV
2    TABLESPACE my_tablespace
3    BUILD IMMEDIATE
4    USING INDEX TABLESPACE my_idx
5    REFRESH
6       START WITH sysdate
7       NEXT ROUND(SYSDATE)+5/24
8       WITH PRIMARY KEY
9    ENABLE QUERY REWRITE
10    AS
11    SELECT car_no cno
12           car_bez cbez
13    FROM cars
14 /
Materialized View wurde erstellt.
scott@orcl>
scott@orcl>I think there is somthing wrong with the permissions of colinsuper!?

Is this colinsuper a user in the remote database.
ORA-00942:     table or view does not exist
Cause:
The table or view entered does not exist, a synonym that is not allowed here was used, or a view was referenced where a table is required. Existing user tables and views can be listed by querying the data dictionary. Certain privileges may be required to access the table. If an application returned this message, the table the application tried to access does not exist in the database, or the application does not have access to it.
Action:
Check each of the following:
the spelling of the table or view name.
that a view is not specified where a table is required.
that an existing table or view name exists.
Contact the database administrator if the table needs to be created or if user or application privileges are required to access the table.
Also, if attempting to access a table or view in another schema, make certain the correct schema is referenced and that access to the object is granted.

Will it make any sense to create materialized view on top of a MOLAP cube?

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