Refresh a materialized view partition

Hi,
We have Oracle 10.2.0.3 DB and have a fast refreshable MV.
We are planning to list partition it and would like to know if a partition can be "individually" refreshed. I looked at the PL/SQL supplied packages doc (for dbms_mview) and DW guide and could not specifically find this information.
Your help is appreciated.
Thanks

Thanks for your response. I understand that it refreshes the partition efficiently but I need the "refresh MV by partition" to satisfy the following requirement:
We have a batch processing systems that run multiple batches at the same time (one per partition key)
We put the MV on demand (its usually on commit during non-batch processin times).
A Batch is run and when it is over, the mv is refreshed and put back to on commit.
so far, only one was run and we have not had a problem. When multiple batches are run , if one job puts it back to commit when second job is still running, the second job starts to crawl.

Similar Messages

Fast Refresh in Materialized Views Partitioned

Hi all.. I've a little problem... let's go into it:
I have two tables:
A dimension table , named D1
A partitioned fact table, named F1
I create two materialized views log in each of 2 tables.
Ok.. Now, I created a Materialized View Partitioned, name MV_F1D1, with incremental refresh for it...
I can create the Materialized View Partitioned with fast refresh, no problem here...
First time Oracle make a Complete refresh, everything ok.. Then I make a
     BEGIN
          DBMS_SNAPSHOT.REFRESH('MV_F1D1','F');
     END;
And everything goes well...
But.. In my fact tables, I load the data with a temporary table, named F1_NP (Fact table no partitionated)
with the data of the current month. Every week I do this:
1) Load the data in F1_NP
2) If the LAST_PARTITION_MM_YYYY not exists in F1, I add the partition to F1...
3) ALTER TABLE F1 EXCHANGE PARTITION LAST_PARTITION_MM_YYYY WITH TABLE F1_NP
And, this is the problem....
After that process, the Log table of F1 is empty..
When i'm trying to fast refresh the mv_F1D1, I got an error
     ORA-12097 changes in the master tables during refresh, try refresh:
THis occurs when only I truncate a partition
in the fact table too.
Ok.. My only solution here is to make a complete refresh.. But I have only a new partition. I expected that with the PCT, Oracle let me
do it a fast refresh.
I'm looking for a solution in the web, and I installed the utlxmnv.sql:
1) Before add a partition in F1
truncate table mv_capabilities_table;
exec DBMS_MVIEW.EXPLAIN_MVIEW ( 'MV_F1D1' );
select * from mv_capabilities_table;
PCT Y
REFRESH_COMPLETE Y
REFRESH_FAST Y
REWRITE Y
PCT_TABLE Y F1
PCT_TABLE N D1 2068 Relation is not partitioned.
REFRESH_FAST_AFTER_INSERT Y
REFRESH_FAST_AFTER_ONETAB_DML Y
REFRESH_FAST_AFTER_ANY_DML Y
REFRESH_FAST_PCT Y
REWRITE_FULL_TEXT_MATCH Y
REWRITE_PARTIAL_TEXT_MATCH Y
REWRITE_GENERAL Y
REWRITE_PCT Y
PCT_TABLE_REWRITE Y F1
PCT_TABLE_REWRITE N D1 2068 Relation is not partitioned.
2) After truncate a partition in F1
truncate table mv_capabilities_table;
exec DBMS_MVIEW.EXPLAIN_MVIEW ( 'MV_F1D1');
select * from mv_capabilities_table;
PCT Y
REFRESH_COMPLETE Y
REFRESH_FAST Y
REWRITE Y
PCT_TABLE Y F1
PCT_TABLE N D1 2068 Relation is not partitioned.
REFRESH_FAST_AFTER_INSERT N F1 2077 Mv log is newer than last full refresh
REFRESH_FAST_AFTER_INSERT N F1 2077 Mv log is newer than last full refresh
REFRESH_FAST_AFTER_ONETAB_DML N 2146
REFRESH_FAST_AFTER_ANY_DML N F1 2076
REFRESH_FAST_AFTER_ANY_DML N 2161
REFRESH_FAST_PCT Y
REWRITE_FULL_TEXT_MATCH Y
REWRITE_PARTIAL_TEXT_MATCH Y
REWRITE_GENERAL Y
REWRITE_PCT Y
PCT_TABLE_REWRITE Y F1
PCT_TABLE_REWRITE N D1 2068 Relation is not partitioned.
BEGIN
          DBMS_SNAPSHOT.REFRESH('MV_F1D1','F');
END;
ORA-32313: REFRESH FAST of "MV_F1D1" unsupported after PMOPs
any ideas? Can I fast refresh a MV partitioned (composed with a Table Dimension and Fact table)
with PCT when I add data in the Dimension Table/add a partition in a Fact Table Partitioned?

Look at ATOMIC_REFRESH option, if you set this to FALSE you may see performance gain as it'll use DIRECT PATH and TRUNCATE. Data will be unavailable while being refreshed though.
Cheers
Si

Materialized View Partitioning

I am creating a materialized view partitioned by range. The column is the grouping id. I have three different grouping sets. How do I defined partition values to make sure I am spreading my data as evenly as possible?
EX. PARTITION VALUES LESS THAN (???)
CREATE MATERIALIZED VIEW REALDW.CLAIM_LIFE_CUBE_MV
TABLESPACE MV_TABLES
NOLOGGING
PARTITION BY RANGE (GID)
PARTITION VALUES LESS THAN (100)
NOLOGGING
NOCOMPRESS
TABLESPACE MV_TABLES,
PARTITION VALUES LESS THAN (1000)
NOLOGGING
NOCOMPRESS
TABLESPACE MV_TABLES,
PARTITION VALUES LESS THAN (MAXVALUE)
NOLOGGING
NOCOMPRESS
TABLESPACE MV_TABLES
NOCACHE
NOPARALLEL
BUILD IMMEDIATE
USING INDEX
TABLESPACE MV_TABLES
REFRESH FORCE ON DEMAND
WITH ROWID
ENABLE QUERY REWRITE
AS
SELECT /*+ PARALLEL (CLAIM_LIFE_FACT, 2, 2) */ PAYER_KEY,
OFFICE_KEY,
CURRENT_CLAIM_STATUS_KEY,
INITIAL_CLAIM_STATUS_KEY,
BATCH_KEY,
PROCESS_TIME_KEY,
BATCH_SUBMIT_TIME_KEY,
OFFICE_START_DATE,
BATCH_SUBMIT_DATE,
DURATION_KEY,
ROUND(TIME_LAPSE),
GROUPING_ID(PAYER_KEY, OFFICE_KEY, CURRENT_CLAIM_STATUS_KEY, DURATION_KEY, INITIAL_CLAIM_STATUS_KEY,
BATCH_KEY, PROCESS_TIME_KEY, BATCH_SUBMIT_TIME_KEY, ROUND(TIME_LAPSE),
OFFICE_START_DATE, BATCH_SUBMIT_DATE) GID,
COUNT(*) COUNT_CLAIM_STAR,
AVG(TIME_LAPSE) AVERAGE_TIME_LAPSE,
COUNT(TIME_LAPSE) COUNT_TIME_LAPSE,
SUM(TOTAL_CHARGE_AMT) TOTAL_CHARGE_AMT,
COUNT(TOTAL_CHARGE_AMT) COUNT_CHARGE_AMT
FROM REALDW.CLAIM_LIFE_FACT
GROUP BY GROUPING SETS ((COLUMN LIST 1), (COLUMN LIST 2) (COLUMN LIST 3));
Thanks in advance.

<quote>Any advice?</quote>
Well, any problem?
I only glanced over the code you've included ... not sure what else I can do here except for building my own example replicating your scenario and determining if that range partitioning over grouping sets is indeed possible (I never had a need to do it and dont like speculating).
Your stated need is to get even data distribution over partitions ... sooo ...
1. hash partition (a power of 2 for the number of partitions) to get even distribution whatever your data (now and in the future)
2. range partition ... but that requires knowledge of the data (as it is right now and how will evolve in the future) in order to achieve that even distribution.
Since I don't know your data, I cannot help with #2. Hope it sounds fair.

How can I manually refresh a Materialized View

Hi,
There's a materialized view created in 2006 as under:
CREATE MATERIALIZED VIEW "schema"."mv_name"
USING INDEX
REFRESH FAST ON DEMAND
WITH PRIMARY KEY USING DEFAULT LOCAL ROLLBACK SEGMENT
DISABLE QUERY REWRITE AS SELECT * FROM "table_name@dblink;
The problem is that the last refresh was done in Aug. I want to manually refresh this materialized view right now as there is a procedure based on this MV and its not showing the right data as the above materialized view has not been refreshed, so the data for this month is not showing.
Please let me know how I can refresh that MV right now.
Also do I need to change the refresh option. How can I change it so that the MV refreshes itself every second.
Thanks

Also do I need to change the refresh option. How can
I change it so that the MV refreshes itself every
second. Every second? Why do you want to do that?? Perhaps waht you really want is refresh the MV on commit.

Fast Refresh Nested Materialized View problem in ORACLE 9i 9.2.0.7

Hello
My problem is in creating fast refresh nested materialized view in oracle 9i
In below is an example of my problem
( I need to say when I run this example in Oracle 11g all things is OK )
create table ali.alitest1(id number primary key,n1 number,n2 number);
create table ali.alitest2(id number primary key,n3 number);
CREATE MATERIALIZED VIEW LOG ON ali.alitest1 WITH ROWID,PRIMARY KEY ,SEQUENCE
(n1,n2)
INCLUDING NEW VALUES;
CREATE MATERIALIZED VIEW LOG ON ali.alitest2 WITH ROWID,PRIMARY KEY ,SEQUENCE
(n3)
INCLUDING NEW VALUES;
CREATE MATERIALIZED VIEW ali.alitest1_mv
REFRESH WITH PRIMARY KEY FAST
AS
select id,n1 from ali.alitest1;
CREATE MATERIALIZED VIEW LOG ON ali.alitest1_mv WITH ROWID,PRIMARY KEY ,SEQUENCE
(n1)
INCLUDING NEW VALUES;
CREATE MATERIALIZED VIEW ali.alitest2_mv
REFRESH WITH PRIMARY KEY FAST
AS
select t1.id,t1.n1,t2.n3,t1.rowid "t1_rowid",t2.rowid "t2_rowid" from ali.alitest1_mv t1,ali.alitest2 t2 where t1.id=t2.id;
SQL Error: ORA-12053: this is not a valid nested materialized view
12053. 00000 - "this is not a valid nested materialized view"
*Cause: The list of objects in the FROM clause of the definition of this
materialized view had some dependencies upon each other.
*Action: Refer to the documentation to see which types of nesting are valid.
do you know what is problem ?
thanks

Take look for this link :
http://rwijk.blogspot.com/2009/08/fast-refreshable-materialized-view.html

Refresh of materialized views

Hi there,
i've got a question to the refreshment of materialized views: when updating or inserting / deleting data of some specific tables, my materialized view should be updated.
First of all, i though to make that happen by using triggers on the specific table and the DBMS_MVIEW.REFRESH() mechanism. But as i have read pretty often, it isn't recommended doing that with triggers.
But how can I get what I want :-)
Thank a lot for your answers,
Martin
Edited by: 949697 on Mar 4, 2013 1:11 AM

Thanks for your answers,
the case with FAST REFRESH doesn't work. Our materialized are very complex and are using e.g subselect-statments, analytic functions,UNION, Order, Group by.... According to the documentation, we can't use the FAST REFRESH.
Using the REFRESH ON COMMIT could be possible. Having a look at the documentation, there is one interesting sentence: A REFRESH ON COMMIT materialized view is refreshed automatically when a transaction that does DML to one of the materialized view's detail tables commits
What are the materialized view's detail tables? Are that all tables in the FROM-Part of the query?
Martin

A bug when refreshing a materialized view?

I am getting "ORA-00603: ORACLE server session terminated by fatal error" upon refresh of a materialized view. I've put together a test case to demonstrate the problem. Is it a bug?
SQL*Plus: Release 10.1.0.3.0 - Production on Fri Jul 29 13:43:45 2005
Copyright (c) 1982, 2004, Oracle. All rights reserved.
Connected to:
Oracle9i Enterprise Edition Release 9.2.0.6.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.6.0 - Production
[email protected]> create table t (
2 id int primary key,
3 t_name varchar2(10),
4 t_date date
5 );
Table created.
[email protected]> create materialized view log on t
2    with rowid (t_name, id, t_date) including new values;
Materialized view log created.
[email protected]> create materialized view t_mv
2   build immediate
3   refresh fast
4   on commit
5 as
6   select t_name, max(id) id, max(t_date) t_date, count(*)
7     from t
8    GROUP BY t_name;
Materialized view created.
[email protected]> create materialized view log on t_mv
2    with rowid (id) including new values;
Materialized view log created.
[email protected]> create table v (
2 id int primary key,
3 t_id int references t(id) on delete cascade,
4 v_name varchar2(10)
5 );
Table created.
[email protected]> create materialized view log on v
2    with rowid (v_name, t_id) including new values;
Materialized view log created.
[email protected]> create materialized view v_mv
2   build immediate
3   refresh fast
4   on commit
5 as
6 select v.rowid rowid1, t_mv.rowid rowid2, v.v_name, v.t_id
7 from v, t_mv
8 where v.t_id = t_mv.id;
Materialized view created.
[email protected]> alter table v_mv
2 add constraint v_mv_uk1 unique
3 (
4 v_name
5 )
6   enable
7 ;
Table altered.
[email protected]> insert into t (id, t_name, t_date) values (1, 'A', sysdate);
1 row created.
[email protected]> insert into t (id, t_name, t_date) values (2, 'B', sysdate);
1 row created.
[email protected]> insert into t (id, t_name, t_date) values (3, 'A', sysdate);
1 row created.
[email protected]> insert into t (id, t_name, t_date) values (4, 'A', sysdate);
1 row created.
[email protected]> insert into t (id, t_name, t_date) values (5, 'B', sysdate);
1 row created.
[email protected]> insert into v (id, t_id, v_name) values (1, 1, 'V_A_1');
1 row created.
[email protected]> insert into v (id, t_id, v_name) values (2, 2, 'V_B_1');
1 row created.
[email protected]> insert into v (id, t_id, v_name) values (3, 3, 'V_A_2');
1 row created.
[email protected]> insert into v (id, t_id, v_name) values (4, 4, 'V_A_3');
1 row created.
[email protected]> insert into v (id, t_id, v_name) values (5, 5, 'V_B_2');
1 row created.
[email protected]> commit;
Commit complete.
[email protected]> insert into t (id, t_name, t_date) values (6, 'A', sysdate);
1 row created.
[email protected]> insert into v (id, t_id, v_name) values (6, 6, 'V_B_2');
1 row created.
[email protected]> commit;
commit
ERROR at line 1:
ORA-12008: error in materialized view refresh path
ORA-00001: unique constraint (FESA.V_MV_UK1) violated
[email protected]> -- ORA-12008 is fine here: that's what was expected
[email protected]> delete from t where id = 5;
1 row deleted.
[email protected]> commit;
ERROR:
ORA-03114: not connected to ORACLE
commit
ERROR at line 1:
ORA-00603: ORACLE server session terminated by fatal errorWhy ORA-00603?
Best regards,
Maciej

It may be a bug, or it may be a result of the dependencies between the materialized views. I don't have a 9.2.0.6 instance that I'm willing to trash to test this, but this is what I get on 9.2.0.1.
If it is a bug they at least changed the behaviour of the bug in 9.2.0.6.
I ran your script up to the first commit then did:
SQL> SELECT * FROM t;
        ID T_NAME     T_DATE
         1 A          29-JUL-05
         2 B          29-JUL-05
         3 A          29-JUL-05
         4 A          29-JUL-05
         5 B          29-JUL-05
SQL> SELECT * FROM t_mv;
T_NAME             ID T_DATE      COUNT(*)
A                   4 29-JUL-05          3
B                   5 29-JUL-05          2
SQL> SELECT * FROM v;
        ID       T_ID V_NAME
         1          1 V_A_1
         2          2 V_B_1
         3          3 V_A_2
         4          4 V_A_3
         5          5 V_B_2
SQL> SELECT * FROM v_mv;
no rows selectedHUH?? But:
SQL> SELECT v.rowid rowid1, t_mv.rowid rowid2, v.v_name, v.t_id
2 FROM v, t_mv
3 WHERE v.t_id = t_mv.id;
ROWID1             ROWID2             V_NAME           T_ID
AAAH4QAAIAAAAl1AAD AAAH4MAAIAAAAlFAAA V_A_3               4
AAAH4QAAIAAAAl1AAE AAAH4MAAIAAAAlFAAB V_B_2               5So, I tried:
SQL> EXEC DBMS_MVIEW.REFRESH('V_MV');
PL/SQL procedure successfully completed.
SQL> SELECT * FROM v_mv;
no rows selectedNow, this is confusing, so:
SQL> EXEC DBMS_MVIEW.REFRESH('V_MV', 'COMPLETE');
PL/SQL procedure successfully completed.
SQL> SELECT * FROM v_mv;
ROWID1             ROWID2             V_NAME           T_ID
AAAH4dAAIAAAAl1AAD AAAH4ZAAIAAAAlFAAA V_A_3               4
AAAH4dAAIAAAAl1AAE AAAH4ZAAIAAAAlFAAB V_B_2               5So at least I've got something in the MV. Now, to continue your test:
SQL> insert into t (id, t_name, t_date) values (6, 'A', sysdate);
1 row created.
SQL> insert into v (id, t_id, v_name) values (6, 6, 'V_B_2');
1 row created.
SQL> COMMIT;
Commit complete.I also expected the error but no joy, and look at this:
SQL> SELECT * FROM v_mv;
ROWID1             ROWID2             V_NAME           T_ID
AAAH4dAAIAAAAl1AAE AAAH4ZAAIAAAAlFAAB V_B_2               5Forcing the refresh on v_mv gets:
SQL> EXEC DBMS_MVIEW.REFRESH('V_MV', 'COMPLETE');
BEGIN DBMS_MVIEW.REFRESH('V_MV', 'COMPLETE'); END;
ERROR at line 1:
ORA-12008: error in materialized view refresh path
ORA-00001: unique constraint (OPS$ORACLE.V_MV_UK1) violatedVery strange! It gets better:
SQL> DELETE FROM t WHERE id = 5;
1 row deleted.
SQL> commit;
Commit complete.
SQL> EXEC DBMS_MVIEW.REFRESH('V_MV', 'COMPLETE');
PL/SQL procedure successfully completed.
SQL> select * from v_mv;
ROWID1             ROWID2             V_NAME           T_ID
AAAH4dAAIAAAAl1AAF AAAH4ZAAIAAAAlFAAA V_B_2               6 But:
SQL> SELECT * FROM t_mv;
T_NAME             ID T_DATE      COUNT(*)
A                   6 29-JUL-05          4
B                   5 29-JUL-05          2
SQL> SELECT * FROM t;
        ID T_NAME     T_DATE
         1 A          29-JUL-05
         2 B          29-JUL-05
         3 A          29-JUL-05
         4 A          29-JUL-05
         6 A          29-JUL-05Obvioulsy, something is not fast refreshing. So lets force it:
SQL> EXEC DBMS_MVIEW.Refresh('T_MV', 'COMPLETE');
PL/SQL procedure successfully completed.
SQL> SELECT * FROM t_mv;
T_NAME             ID T_DATE      COUNT(*)
A                   6 29-JUL-05          4
B                   2 29-JUL-05          1
SQL> SELECT * FROM v_mv;
ROWID1             ROWID2             V_NAME           T_ID
AAAH4dAAIAAAAl1AAB AAAH4qAAIAAAAlEAAB V_B_1               2
AAAH4dAAIAAAAl1AAF AAAH4qAAIAAAAlEAAA V_B_2               6Which looks right to me.
Then, I blew everything away and did it allagain up to an including the inserts into t, then I inserted into v and commited. Now, both MV's were correct, so I did:
SQL> insert into t (id, t_name, t_date) values (6, 'A', sysdate);
1 row created.
SQL> insert into v (id, t_id, v_name) values (6, 6, 'V_B_2');
1 row created.
SQL> commit;
Commit complete.
SQL> SELECT * FROM t_mv;
T_NAME             ID T_DATE      COUNT(*)
A                   6 29-JUL-05          4
B                   5 29-JUL-05          2Still strange, so blow it all away again insert into t commit, insert into v commit, then:
SQL> insert into t (id, t_name, t_date) values (6, 'A', sysdate);
1 row created.
SQL> commit;
Commit complete.
SQL> insert into v (id, t_id, v_name) values (6, 6, 'V_B_2');
1 row created.
SQL> commit;
commit
ERROR at line 1:
ORA-12008: error in materialized view refresh path
ORA-00001: unique constraint (OPS$ORACLE.V_MV_UK1) violatedAt least now it sees the error at commit time for v so lets try the delete:
SQL> delete from t where id = 5;
1 row deleted.
SQL> commit;
Commit complete.
SQL> SELECT * FROM t_mv;
T_NAME             ID T_DATE      COUNT(*)
A                   6 29-JUL-05          4
B                   5 29-JUL-05          2
SQL> SELECT * FROM t;
        ID T_NAME     T_DATE
         1 A          29-JUL-05
         2 B          29-JUL-05
         3 A          29-JUL-05
         4 A          29-JUL-05
         6 A          29-JUL-05Still not actually refreshing somehow.
I may play with this some more, it seems truly strange to me.
John

Refresh a materialized view in parallel

Hi,
To improve the refresh performance for a materialized view, I set up it to be refreshed in parallel. The view can be refreshed successfully, however, I did not see the view is refreshed in parallel from session browser, can someone let me know if I miss any steps?
1) In DB A (running 8 CPUs), set up the base table to be parallelized, the base table is called table1
ALTER TABLE A.table1 PARALLEL ( DEGREE Default INSTANCES Default );
2) In Database A, set up the materialized view log
CREATE MATERIALIZED VIEW LOG
ON table1 WITH primary key
INCLUDING NEW VALUES;
3) In Database B (in the same server with Database A), there is an existing table called table1, prebuilt with millions of records in the table. Due to the size of table1, I have to use prebuilt option
Drop MATERIALIZED VIEW table1;
CREATE MATERIALIZED VIEW table1 ON PREBUILT TABLE
REFRESH FAST with primary key
AS
select /*+ PARALLEL(table1, 8) */ *
from table1@A;
4) in Database B, I executed this stored procedure -
EXECUTE DBMS_MVIEW.REFRESH(LIST=>'table1',PARALLELISM=>8, METHOD=>'F');
Thanks in advance!
Liz

I checked the execution plan when I executed the refresh stored procedure again, Does the plan indicates the parallel execution is working or not?
SELECT STATEMENT REMOTE ALL_ROWSCost: 32,174 Bytes: 775,392 Cardinality: 1,182
13 PX COORDINATOR
12 PX SEND QC (RANDOM) PARALLEL_TO_SERIAL SYS.:TQ10001 :Q1001
     11 NESTED LOOPS PARALLEL_COMBINED_WITH_PARENT :Q1001
     9 NESTED LOOPS PARALLEL_COMBINED_WITH_PARENT :Q1001Cost: 32,174 Bytes: 775,392 Cardinality: 1,182
          6 BUFFER SORT PARALLEL_COMBINED_WITH_CHILD :Q1001
               5 PX RECEIVE PARALLEL_COMBINED_WITH_PARENT :Q1001
                    4 PX SEND ROUND-ROBIN PARALLEL_FROM_SERIAL SYS.:TQ10000 A
                         3 VIEW APP_USR. Cost: 12,986 Bytes: 6,070,196 Cardinality: 275,918
                              2 HASH UNIQUE Cost: 12,986 Bytes: 9,105,294 Cardinality: 275,918
                                   1 TABLE ACCESS FULL TABLE A.MLOG$_TABLE1 A Cost: 10,518 Bytes: 9,105,294 Cardinality: 275,918
     8 PARTITION RANGE ITERATOR PARALLEL_COMBINED_WITH_PARENT :Q1001Cost: 0 Cardinality: 1
     7 INDEX RANGE SCAN INDEX (UNIQUE) PARALLEL_COMBINED_WITH_PARENT A.PK_TABLE1 :Q1001Cost: 0 Cardinality: 1
10 TABLE ACCESS BY LOCAL INDEX ROWID TABLE PARALLEL_COMBINED_WITH_PARENT A.TABLE1 :Q1001Cost: 0 Bytes: 634 Cardinality: 1

Fast Refresh on Materialized View With Join

Hi All,
i have created following Materialized View Logs and MV
on EMP and DEPT
CREATE MATERIALIZED VIEW LOG ON DEPT
WITH PRIMARY KEY,SEQUENCE
INCLUDING NEW VALUES;
CREATE MATERIALIZED VIEW LOG ON EMP
WITH PRIMARY KEY,SEQUENCE
INCLUDING NEW VALUES;
CREATE MATERIALIZED VIEW EMP_MVW
TABLESPACE OSMIS_REPORT_DATA
REFRESH FAST ON COMMIT
AS
SELECT A.EMPNO,A.ENAME,A.DEPTNO,A.JOB,A.MGR,A.HIREDATE,A.SAL,A.COMM,B.DNAME,B.LOC
FROM EMP A,DEPT B
WHERE A.DEPTNO=B.DEPTNO
The Create MV Stmnt raised following error.
ERROR at line 6:
ORA-12052: cannot fast refresh materialized view SCOTT.EMP_MVW
I have tried the same with ROWID also,but same error
while creating MV.
Pls anyone give idea to Fast Refersh on MV with Joins
Thnks
Raj.G.
mail : [email protected]

Actually you can get Oracle to tell you why the view does not have the capabilities you want using the DBMS_MVIEW package. For example you could have done something like this...
Personal Oracle Database 10g Release 10.1.0.2.0 - Production
With the Partitioning, OLAP and Data Mining options
SQL> CREATE MATERIALIZED VIEW LOG ON dept
2    WITH PRIMARY KEY, SEQUENCE
3      INCLUDING NEW VALUES;
Materialized view log created.
SQL> CREATE MATERIALIZED VIEW LOG ON emp
2    WITH PRIMARY KEY,SEQUENCE
3      INCLUDING NEW VALUES;
Materialized view log created.
SQL> CREATE MATERIALIZED VIEW emp_mvw
2    REFRESH FAST ON COMMIT
3 AS
4 SELECT a.empno, a.ename, a.deptno,
5         a.job, a.mgr, a.hiredate,
6         a.sal, a.comm, b.dname, b.loc
7 FROM   emp a,dept b
8 WHERE a.deptno = b.deptno;
FROM   emp a,dept b
ERROR at line 7:
ORA-12052: cannot fast refresh materialized view SCOTT.EMP_MVW
SQL> CREATE MATERIALIZED VIEW emp_mvw
2    REFRESH ON COMMIT -- remove the FAST to allow view to compile
3 AS
4 SELECT a.empno, a.ename, a.deptno,
5         a.job, a.mgr, a.hiredate,
6         a.sal, a.comm, b.dname, b.loc
7 FROM   emp a,dept b
8 WHERE a.deptno = b.deptno;
Materialized view created.
SQL> @\oracle\product\10.1.0\Db_1\RDBMS\ADMIN\utlxmv.sql -- create mv_capabilities_table
Table created.
SQL> EXEC DBMS_MVIEW.EXPLAIN_MVIEW ('EMP_MVW');
PL/SQL procedure successfully completed.
SQL> SELECT capability_name, possible, msgtxt
2 FROM   mv_capabilities_table
3 WHERE capability_name LIKE '%REFRESH_FAST_AFTER%';
CAPABILITY_NAME                P MSGTXT
REFRESH_FAST_AFTER_INSERT      N the SELECT list does not have the rowids of all the detail tables
REFRESH_FAST_AFTER_INSERT      N mv log must have ROWID
REFRESH_FAST_AFTER_INSERT      N mv log must have ROWID
REFRESH_FAST_AFTER_ONETAB_DML N see the reason why REFRESH_FAST_AFTER_INSERT is disabled
REFRESH_FAST_AFTER_ANY_DML     N see the reason why REFRESH_FAST_AFTER_ONETAB_DML is disabled
SQL> DROP MATERIALIZED VIEW LOG ON dept;
Materialized view log dropped.
SQL> DROP MATERIALIZED VIEW LOG ON emp;
Materialized view log dropped.
SQL> DROP MATERIALIZED VIEW emp_mvw;
Materialized view dropped.
SQL> CREATE MATERIALIZED VIEW LOG ON dept
2    WITH ROWID, SEQUENCE
3      INCLUDING NEW VALUES;
Materialized view log created.
SQL> CREATE MATERIALIZED VIEW LOG ON emp
2    WITH ROWID,SEQUENCE
3      INCLUDING NEW VALUES;
Materialized view log created.
SQL> CREATE MATERIALIZED VIEW emp_mvw
2    REFRESH FAST ON COMMIT
3 AS
4 SELECT a.ROWID emp_rowid, b.ROWID dept_rowid,
5         a.empno, a.ename, a.deptno,
6         a.job, a.mgr, a.hiredate,
7       a.sal, a.comm, b.dname, b.loc
8 FROM   emp a,dept b
9 WHERE a.deptno = b.deptno;
Materialized view created.
SQL> DELETE mv_capabilities_table;
18 rows deleted.
SQL> EXEC DBMS_MVIEW.EXPLAIN_MVIEW ('EMP_MVW');
PL/SQL procedure successfully completed.
SQL> SELECT capability_name, possible, msgtxt
2 FROM   mv_capabilities_table
3 WHERE capability_name LIKE '%REFRESH_FAST_AFTER%';
CAPABILITY_NAME                P MSGTXT
REFRESH_FAST_AFTER_INSERT      Y
REFRESH_FAST_AFTER_ONETAB_DML Y
REFRESH_FAST_AFTER_ANY_DML     Y
SQL>

Erro perforing Fast Refresh of Materialized View.

Hi Experts,
We are facing serious problem while refreshing materialized views using fast refresh option in ORACLE..
For the very first time we are performing Complete refresh of data from DB1 to DB2 for few tables.Ongoing we are performing Fast Refresh.
Sometimes the fast refresh works fine without any error and sometimes it fails with the below error.
ERROR at line 1:
ORA-32320: REFRESH FAST of "CIR"."C_BO_COMM" unsupported after cointainer table
PMOPs
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 803
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 860
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 841
ORA-06512: at line 1we came to know the folowing.
// *Cause:
A Partition Maintenance Operation (PMOP) has been performed on the materialized view,
and no materialized view supportsfast refersh after container table PMOPs.
// *Action:
               Use REFRESH COMPLETE.
     Note:
               you can determine why your materialized view does not support fast refresh after PMOPs using
               the DBMS_MVIEW.EXPLAIN_MVIEW() API.Please let u know what action to be taken to avoid this.
Please note that this error is not repeated always. Some times REFRESH FAST is happening and some times it is throwing error.
Appreicate your earliest reply.
Thank you.
Edited by: User71408 on Sep 4, 2008 11:40 PM
Edited by: User71408 on Sep 4, 2008 11:43 PM
Edited by: User71408 on Sep 5, 2008 12:38 AM

9i doesn't support fast refresh after truncate. Read the metalink note 275325.1
You should be sure no truncate has been executed, or use complete refresh.
Nicolas.

How can I fast refresh the materialized view !!

I created a MV base on some tables in order to improve the querey speed.
but the mv I have created falied to refresh fast.
because there are two same table in the from clause:
jcdm jc1,jcdm jc2
create materialized view temp_mv
nologging
pctfree 0
storage (initial 2048k next 2048k pctincrease 0)
parallel
build immediate
refresh force
on demand
as
select
TAB_GSHX.rowid hx_rid,
TAB_GSHD.rowid hd_rid ,
JC1.rowid jc1_rid ,
JC2.rowid jc2_rid ,
YSHD_ID     HXID,
JC1.JCDM     QFD,
JC2.JCDM     JLD
FROM
TAB_GSHX,
TAB_GSHD,
jCDM JC1,
JCDM JC2
WHERE
YSHD_ID=YSHX_ID
AND YSHD_QFD=JC1.JBJC_ID
AND YSHD_JLD=JC2.JBJC_ID
AND TO_CHAR(YSHX_time,'YYYYMMDD')='20030101'
the column msgtxt of the table MV_CAPABILITIES_TABLE is :
"the multiple instances of the same table or view" and " one or more joins present in mv".
How can I succeed in fast refresh the above temp_mv!!!
thanks.

lianjun,
When you are using Oracle9i there is a procedure which can help you setup the materialized view. If some option isn't working it gives you hint why it doesn't work.
The procedure is dbms_mview.explain_mview.
Take a look at the documentation how to use it. (In the Oracle9i DWH guide the package is explained.)
Hope this helps
With kind regards,
Bas Roelands

BEST WAY TO REFRESH A MATERIALIZED VIEW

Hi, I have a Materialized View that was created after two Base Tables, Table A is a Dynamic Table, this means that it have Insert's, update's and delete's, and a Table B that is a Fixed Table, this means that this table do not change over time (it's a Date's Table). The size of the Table related to the Materialized View is to big (120 millions rows) so the refresh has to be very efficient in order to not affect the Data Base performance.
I was thinking on a Fast Refresh mode but It would not work because the log created on the B table is not usefull, the thing is that I created the two materialized view log's (Tables A and B) and when I execute the dbms_mview.refresh(list =>'MV', method => 'F')+ sentence I got the error
cannot use rowid column from materialized view log on "Table B" ... remember that this table don't change over time ...
I need to mantain the Materialized view up to date, but do not know how ... Please Help !!!!!

The Materialized View name is test_sitedate2
The Table B name is GCO01.FV_DATES .... is a Fixed Table ... do not change over time ...
The Code of the MV is
CREATE MATERIALIZED VIEW TEST_SITEDATE2
REFRESH FORCE ON DEMAND
AS
SELECT site_id, date_stamp
FROM gco01.fv_site, gco01.fv_dates
where fv_dates.date_stamp >= fv_site.start_date
and fv_dates.date_stamp >= to_date('01/03/2010', 'dd/mm/yyyy')
and fv_dates.date_stamp < to_date('01/04/2010', 'dd/mm/yyyy');
Each table gco01.fv_site and gco01.fv_dates have it's materiallized view log created
The error is ....
SQL> execute dbms_mview.refresh(list =>'test_sitedate2', method => 'F');
begin dbms_mview.refresh(list =>'test_sitedate2', method => 'F'); end;
ORA-12032: cannot use rowid column from materialized view log on "GCO01"."FV_DATES"
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2254
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2460
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2429
ORA-06512: at line 1
Thank's

Time taken to Refresh a Materialized View

Hi,
Can we somehow estimate the approximate time it takes to Fast Refresh a particular Materialized View?
In my case it is REFRESH FAST ON DEMAND and it contains close to 65 Million Records. On a daily basis 40K records are updated/inserted in the Materialized View. Also MV Logs are created on the Master Tables.
The query of the MV is a join between a Dimension and Fact Table of a Datawarehouse. Each Master Table contains close to 70 million records.
Could you please let me know?
Thanks, Ketan

Hi Jignesh,
Thanks for the reply.
Actually what I would like to know is can we somehow estimate/forecast the Refresh Time before actually refreshing the MV.
Currently, in my case I am testing in a Non-Production Environment where the two MV logs contain 65K and just 70 records respectively. The Records finally Inserted/Updated from the MV is just 50. The time to refresh is about 7 minutes.
However, in the Production Environment, I am expecting close to 25-30K Inserts/Updates from the MV. So, I would like to know if we could PREDICT the approximate time required to Refresh a far larger dataset?
For example, to refresh close to 100K records in the View Logs will it take a far greater time or just some additional time? Is the Refresh rate directly dependent on the Number of Records to be refreshed or it takes a standard time to Refresh irrespective of the No. of Records?
Would appreciate your inputs on this.
Thanks, Ketan

JOB to refresh the materialized views

Hi,
I have created the following job to call a procedure which refreshes all the materialized views but it that job has been running from ages although in the past it seems to work.
Can u advise me what im missing
REM : procedure to refresh all the job
PROCEDURE PROC_REFRESH_MVS AS
BEGIN
This procedure will refresh all of the MVs
DBMS_MVIEW.REFRESH('MV_A','c');
DBMS_MVIEW.REFRESH('MV_B','c');
DBMS_MVIEW.REFRESH('MV_Z','c');
END PROC_REFRESH_MVS;
REM Job to call the procedure
BEGIN
sys.dbms_scheduler.create_job(
job_name => '"SCHEMAOWNER"."REFRESH_MVS"',
job_type => 'STORED_PROCEDURE',
job_action => 'SCHEMAOWNER.PROC_REFRESH_MVS',
start_date => systimestamp at time zone 'Europe/Lisbon',
job_class => 'DEFAULT_JOB_CLASS',
comments => 'Refresh all the materialized views ',
auto_drop => FALSE,
enabled => FALSE);
sys.dbms_scheduler.set_attribute( name => '"SCHEMAOWNER"."REFRESH_MVS"', attribute => 'logging_level', value => DBMS_SCHEDULER.LOGGING_FULL);
sys.dbms_scheduler.enable( '"SCHEMAOWNER"."REFRESH_MVS"' );
END;

Hi
To understand what's going on you should analyze the trace file that is generated when such an error occurs. Metalink note 131885.1 may be helpful.
HTH
Chris

Fast refresh of materialized view

Hi All,
This is my first posting on this forum, so I hope I don't step on anyone's toes as I wade into a problem that I am experiencing.
I have a number of either join-only or single table aggregate materialized views that I have experienced problems with. All the views are setup for FAST REFRESH ON DEMAND but I'm hitting an error if I execute a COMPLETE refresh of the view when I've done an ALTER SESSION ENABLE PARALLEL DML. The error I get is:
ERROR at line 1:
ORA-30439: refresh of 'DTKTGT.CTNS_PER_HR_VOL_AGG_MV' failed because of ORA-32320: REFRESH FAST of "DTKTGT"."CTNS_PER_HR_VOL_AGG_MV" unsupported after cointainer table PMOPs
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 814
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 872
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 852
ORA-06512: at "DTKTGT.MV_REFRESH", line 21
ORA-06512: at line 2
Any help anyone could provide would be greatly appreciated as every now and then, a COMPLETE refresh is unavoidable and using the ENABLE PARALLEL DML makes the refresh run a lot faster than without the ALTER SESSION.
Gary

This forum only is for questions relating to the use of OLAP Option. I would post your question on the database forum.
Keith Laker
Oracle Data Warehouse Product Management
OLAP Blog: http://oracleOLAP.blogspot.com/
OLAP Wiki: http://wiki.oracle.com/page/Oracle+OLAP+Option
DM Blog: http://oracledmt.blogspot.com/
OWB Blog : http://blogs.oracle.com/warehousebuilder/
OWB Wiki : http://wiki.oracle.com/page/Oracle+Warehouse+Builder
DW on OTN : http://www.oracle.com/technology/products/bi/db/11g/index.html

Refresh a materialized view partition

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