use of materialized views?

can someone tell me the use of materilized views in oracle?
briefly explain it please...

Are you clear now? Those who helped you...?
If this isn't the case, you can still ask your doubts until you release.

Vanessa B.

Tags: Database

Similar Questions

  • ORA-12083: must use DROP MATERIALIZED VIEW to drop

    Hi all

    Oracle 10 g 2
    Solaris 10

    face below question... can't go below the user because of the MV... Please let me know how to delete user and MV...
    SQL > drop user cascade DW_USR;
    *
    ERROR on line 1:
    ORA-00604: an error has occurred at the SQL level 1 recursive
    ORA-12083: must use DROP MATERIALIZED VIEW to drop
    'DW_USR '. "" Dept_account_MV_M ".

    I tried as you said... .but no luck.
    .. is this a bug?

    I hope that's not a bug...

    I hope.. materialized view appears to be abandoned by the drop command but recreation fails because of some disctionary sys tables. the origin of the problem... it's suspicious only...

    check once... otherwise connect you SR with metalink...

  • Do not to use the materialized view

    I wonder if we've already created a materialized view, can we prefer not to use this point of view, materialized for a query? I want to say can we determine if a query uses MV and other queries don't use MV?  Thank you.

    Hello Indra,

    I'm not completely sure about that, but you can read (with examples) concerning the indications- NO_REWRITE and REWRITE

    Text over the doc links:

    Council of REWRITING:

    The REWRITE Council instructs the optimizer to rewrite a query regarding the materialized views when possible, regardless of cost. Use the REWRITE trick with or without a display list. If you use REWRITE with a view list and the list contains an eligible materialized view, then Oracle uses this view regardless of its cost.

    Tip NO_REWRITE:

    The NO_REWRITE Council tells the optimizer to disable the rewrite of the query to the query block, of the substitution of the definition of the parameter QUERY_REWRITE_ENABLED .

    Be aware! -The NOREWRITE suspicion has been deprecated. Use the NO_REWRITE hint instead.

    Read here: setting QUERY_REWRITE_ENABLED

    -Nordine

  • Replication of data between SQL Server and using Oracle11g materialized view.

    I have Sqlserver 2005 as my source and oracle11g as my target. I need fill out the target daily with change of the source data.
    to do this, we created a dblink between SQL Server and oracle and reproduced this table as a point of view, materialized in Oracle.
    problem that we get here is fast refresh option is not available.each day it will pick up all of the data source.
    is it possible to use Fast refresh in this scenario?

    Thanks in advance.

    Kind regards
    Balaram.

    You can try MS SQL replication.
    Configure transactional Standard of MS SQL and Oracle Publication subscriber http://msdn.microsoft.com/en-us/library/ms151738%28v=sql.90%29.aspx

  • I get "failed to set the refresh attribute COMMIT for the materialized view" when I try to create a MV using a table and another MV

    Experts,

    I'm trying to create a YOUNG refreshable ON COMMIT MV (xyz) using a table (circuit) and quickly updateable on validation MV (abc), but get an error:

    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 requirements for update to

    moment of validation.

    * Action: Specify only valid options.

    1] MV abc
    = MV abc defined as below =.

    CREATE MATERIALIZED view abc_MV

    Immediate CONSTRUCTION

    REFRESH QUICKLY YOU COMMIT using constraints of trust

    WITH ROWID AS SELECT n.*,.

    n.ROWID noderowid

    node n

    where n.nodetype in (1610000069,1610007267);


    -Above works OK and MV connect you on table node is created successfully

    =====================================================

    [ 2] Circuit Board

    ======================================================

    CREATE MATERIALIZED VIEW LOG ON Cramer.Circuit WITH SEQUENCE, ROWID ( ) -all columns of table ofcircut parentheses

    INCLUDING THE NEW VALUES;

    -More top works OK and MV connect you on table circuit is created successfully

    ======================================================



    [3] trying to create MV xyz

    ======================================================

    CREATE MATERIALIZED VIEW LOG ON cramer.abc_MV WITH SEQUENCE, ROWID ( ) -all columns of abc_MV brackets

    INCLUDING THE NEW VALUES;

    -Above works OK and log on ABC MV MV gets created successfully

    -Problematic step below

    Xyz_MV CREATE MATERIALIZED VIEW

    IMMEDIATE CONSTRUCTION

    REFRESH QUICKLY YOU COMMIT using constraints of trust

    AS

    SELECT c., c.rowid circuit_rowid, n.rowid tr_rowid

    the circuit c, abc_mv n

    where circuit2startnode = n.nodeid

    and c.rpplanId = n.rpplanId;
    ==========================================================

    Clues on how to solve this problem and make quickly updatable ON Commit MV xyz

    Thanks in advance.

    Chanchal,

    If you can read my original post carefully you may have noticed that all these restrictions will not apply in my case.

    All,

    In any case I found the solution to my problem.

    There are a few additional restrictions for materialized views multilayer

    Additional Restrictions for master materialized views

    The following types of materialized views may not be masters of editable materialized views:

    • ROWIDmaterialized views
    • Complex materialized views
    • Read-only materialized views

    I've updated the underlying MV abc below and everything worked like a charm

    CREATE MATERIALIZED view abc_MV

    Immediate CONSTRUCTION

    REFRESH QUICKLY YOU COMMIT using constraints of trust

    IN SELECT

    n.*, n.rowid noderowid, nt.rowid nodetyperowid

    the node n, nodetype_m nt

    where n.node2nodetype = nt.nodetypeid

    and nt.nodetypeid in (1610000069,1610007267);

    Note: To ADD a join without which I was getting error below (although had primary key on the table of the node)

    SQL error: ORA-23415: materialized view log for "NODE" does not save the primary key

    23415 00000 - "view the log for materialized \"%s\".\"%s\"does not save the primary key.

    * Cause: A primary key materialized view is refreshed quickly, but the

    The materialized view log does not record the primary key information.

    * Action: Use CREATING MATERIALIZED VIEW LOG... Command to add a PRIMARY KEY to

    start recording of the primary key information in the materialized view

    Newspaper.

  • ORA-12028: type of materialized view is not supported by the main site

    Hi guys!

    We face a problem these days about the materialized view.

    We have upgraded database version 9.2.0.7 directly to 10.2.0.5 (RHEL4 x 86) on the same host. Database uses the driver dg4odbc to connect with remote SQL Server 2012 through data binding called MIKSERI. Our developer team would like to have replicated SQL server table data side Oracle using the materialized view.

    They created Materialized view, but it is not at all to refresh the data. I tried to study a little bit, and whenever I try to change the view anyway I hit error:

    ORA-12028: view type is not supported by the master site materialized @ 'MIKSERI '.

    ORA-06512: at line 22

    I looked at the solutions proposed and discovered that it is maybe the compatible database parameter, so I changed from previous 9.2.0.0.0 to 10.2.0.1.0 but still no luck. Just to emphasize this database is of course different clone of production to a different database, with db name retained and other parameters, but on another host computer and listening port. I even try to change global name, but still no luck.

    Main problem is that refresh the work does not at all. To be more precise, we have created MV on the side of the Oracle and FULL Refresh should be done every 3 minutes. MV uses HS db link to the sql server database.

    During the creation of MV, we can see currently given to sql server, but the problem is that we cannot do MV to refresh every 3 minutes. When I try to change MV and put the refresh interval I get above error.

    Any kind of help would be greatly appreciated,

    Thank you

    I found the reason why my MV update jobs failed, job_queue_processes parameter was equal to 0. I change this setting and now works fine.

    Thank you for your time!

  • 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.

  • Problems with the materialized view

    Hello

    I need help enforce data integrity using a materialized view. In my example, each system can consist of three types of components, and it is modeled using the supertype/subtype relationships. I'm trying to argue that, for a given system, a component cannot reside in more than one table of components. For example, given the system 1, if A component exists in the mobile_components table, it is impossible to insert into the table desktop_components for system 1. Rather than using triggers, I try to use views materialized with unique constraint to enforce this rule based on the example of "The trouble with triggers" article http://www.oracle.com/technetwork/issue-archive/2008/08-sep/o58asktom-101055.html of Tom Kyte. However, I can't seem to make it work because it gives me ORA-12054: cannot set the ON COMMIT refresh attribute.  I use UNION ALL and I know that can be difficult, but I can not understand what are the rules I'm breaking.  I have the necessary privileges.  Oracle 11g.  Can anyone help?

    Thank you

    Mark

    create table systems (
sys_id number,
sys_name varchar2(100),
constraint sys_pk primary key (sys_id),
constraint sys_uk unique (sys_name));

insert into systems values (1,'System 1');
insert into systems values (2,'System 2');




    create table mobile_components (
mo_comp_id number,
mo_comp_name varchar2(100),
mo_comp_sys_id number,
constraint mo_pk primary key (mo_comp_id),
constraint mo_uk unique (mo_comp_name, mo_comp_sys_id),
constraint mo_fk foreign key (mo_comp_sys_id) references systems (sys_id));

insert into mobile_components values (1,'Component A',1);
insert into mobile_components values (2,'Component A',2);




    create table desktop_components (
de_comp_id number,
de_comp_name varchar2(100),
de_comp_sys_id number,
constraint de_pk primary key (de_comp_id),
constraint de_uk unique (de_comp_name, de_comp_sys_id),
constraint de_fk foreign key (de_comp_sys_id) references systems (sys_id));

insert into desktop_components values (1,'Component B',1);
insert into desktop_components values (2,'Component B',2);




    create table internet_components (
in_comp_id number,
in_comp_name varchar2(100),
in_comp_sys_id number,
constraint in_pk primary key (in_comp_id),
constraint in_uk unique (in_comp_name, in_comp_sys_id),
constraint in_fk foreign key (in_comp_sys_id_ references systems (sys_id));

insert into internet_components values (1,'Component C',1);
insert into internet_components values (2,'Component C',2);




    create materialized view log on mobile_components with rowid;
create materialized view log on desktop_components with rowid;
create materialized view log on internet_components with rowid;




    create materialized view mv_components
refresh fast on commit with rowid as
select rowid as row_id, mo_comp_id as comp_id, mo_comp_name as comp_name
from mobile_components
union all
select rowid, de_comp_id, de_comp_name
from desktop_components
union all
select rowid, in_comp_id, in_comp_name
from internet_components;

alter table mv_components add constraint mv_comp_uk unique (comp_id, comp_name);

    You need a column marker to distinguish which questions you Union, that the data are:

    for example

    Create materialized view mv_components

    cool off quickly on commit with rowid as

    Select 'a' marker, rowid as row_id, mo_comp_id as identifiant_composant mo_comp_name as comp_name

    of mobile_components

    Union of all the

    Select 'b', rowid, de_comp_id, de_comp_name

    of desktop_components

    Union of all the

    Select 'c', rowid, in_comp_id, in_comp_name

    of internet_components;

  • fast refresh on MATERIALIZED VIEW

    Oracle 10 g R2 (10.2.0.5)

    Scott.mv_test CREATE MATERIALIZED VIEW
    Users TABLESPACE
    NOCACHE
    LOGGING
    NOCOMPRESS
    NOPARALLEL
    IMMEDIATE CONSTRUCTION
    REFRESH THE STRENGTH TO DEMAND
    WITH THE PRIMARY KEY
    AS
    Select...

    I this MV, when I do the QUICK refersh as follows, I get the error message

    SQL > execute DBMS_MVIEW. REFRESH ('MV_TEST', 'f');
    DBMS_MVIEW BEGIN. REFRESH ('MV_TEST', 'f'); END;

    *
    ERROR on line 1:
    ORA-12004: QUICK COOLING can be used to view materialized "SCOTT." "" MV_TEST ".
    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

    But it works with full refresh.

    Is this planned, any help would be appreciated.

    Thank you 
    ORA-12004: REFRESH FAST cannot be used for materialized view "string"."string"
Cause:      The materialized view log does not exist or cannot be used. PCT refresh is also not enabled on the materialized view
Action:      Use just REFRESH, which will reinstantiate the entire table. If a materialized view log exists and the form of the materialized view allows the use of a materialized view log or PCT refresh is possible after a given set of changes, REFRESH FAST will be available starting the next time the materialized view is refreshed.

    http://ORA-12004.ora-code.com/

  • Materialized view - automatic update

    I used the table with the structure below

    CREATE THE SYSTEM TABLE. EMPLOYEE
    (
    Key primary employee_id NUMBER,.
    NUMBER OF SALARY,
    DEPARTMENT_ID NUMBER
    );

    I have created the log and used of materialized view

    Used to CREATE MATERIALIZED VIEW LOG ON
    WITH THE PRIMARY KEY
    INCLUDING THE NEW VALUES;

    Emp_data CREATE MATERIALIZED VIEW
    PCTUSED, PCTFREE 5 60
    STORAGE (INITIAL 50K NEXT 50K)
    REFRESH QUICKLY ON APPLICATION START WITH SYSDATE NEXT (sysdate + 13/24)
    WITH THE PRIMARY KEY
    AS SELECT * FROM employee;

    I want to refresh the values on 13:00. But it is not refreshing automatically. Journal has the most recent values.
    I initialized job_queue_processes at 10 and my dba_jobs also has this work.

    Is it necessary to define dbms_job on this materialized view?

    (1) the FOLLOWING definition is incorrect. If you want updating to occur daily at 13:00, you would like to TRUNC (sysdate + 1) + 13/24. SYSDATE + 13/24 is 13 hours later, so you should have refreshes at 13:00, 2 AM, 15:00, 04:00, etc.

    (2) when you query DBA_JOBS for this task, what do you see for NEXT_DATE, NEXT_SEC, LAST_DATE, LAST_SEC, FAILURES and BROKEN?

    Justin

  • Materialized views Oracle | Reporting

    I have a requirement as follows:

    Requirement:
    We must create a Reporting DB to be used for information and a transactional database will be in separate host. Fundamentally, he need to extract data from a set of transactional DB tables and move to the Reporting DB schema at adequate intervals.


    We may have to get a different column data in different tables and store it in a single table / several reports DB tables.


    Solution (Please confirm):

    I intend to use Oracle materialized views in the same host as transactional DB to next part of requirment

    "We may have to get a different column data in different tables and store it in a single table / several reports DB tables.

    and then use Oracle streams to move at regular intervals of DB reports.

    Is this feasible?
    Or please suggest a solution.

    Thank you
    APPU

    We must create a Reporting DB to be used for information and a transactional database will be in separate host. Fundamentally, he need to extract data from a set of transactional DB tables and move to the Reporting DB schema at adequate intervals.

    Depending on how small and simple is your database, you can create materialized views on the Reporting DB to point to DB Transactionla through the database link.

    I intend to use Oracle materialized views in the same host as transactional DB to next part of requirment

    If are simple MVs, then let them cool off quickly. If too complex, all jobs to refresh at specific intervals.

    "We may have to get a different column data in different tables and store it in a single table / several reports DB tables.

    You will be several tables in DB report in the form of the Metrialised views

    and then use Oracle streams to move at regular intervals of DB reports.

    This combination is not necessary. You're talking about two different things at the same time.

  • Refresh Materialized view on request using db link

    Hello

    someone at - it how to refresh a materialized using db link view.

    My scenario is I have MV in a scheme and I need to update it in Figure B. Is it still possible.

    I tried updating using db link and wasn't able to do the same.

    All entries on this?

    Wow. It's a strange way to security.

    exec dbms_mview.refresh@dblink ('TESTVW')

  • Problem with a complete refresh materialized view when using rownum

    Hi all

    I had a problem with rownum when complete using Refresh

    I use rownum when you create the materialized view, and this is the generation properly. But the question was when I even refreshing, rownum was not get sorted in ascending order.

    anyone encountered this scenario

    rownum is determined as the line came out, also "order by rownum" does absolutely nothing.

    http://docs.Oracle.com/CD/B19306_01/server.102/b14200/pseudocolumns009.htm

  • extracting data from the CLOB using materialized views

    Hello

    We have xml data from clob which I have a requirement to extract (~ 50 attributes) on a daily basis, so we decided to use materialized views with refreshes full (open good suggestions)

    A small snippet of code

    CREATE THE MWMRPT MATERIALIZED VIEW. TASK_INBOUND

    IMMEDIATE CONSTRUCTION

    FULL REFRESH ON DEMAND

    WITH ROWID

    AS

    SELECT M.TASK_ID, M.BO_STATUS_CD, b.*

    OF CISADM. M1_TASK m,

    XMLTABLE (' / a ' XMLPARSE PASSING ())

    CONTENT '< a > | M.BO_DATA_AREA | "< /a >."

    ) COLUMNS

    serviceDeliverySiteId varchar2 (15) PATH

    "cmPCGeneralInfo/serviceDeliverySiteId"

    serviceSequenceId varchar2 (3) PATH "cmPCGeneralInfo/serviceSequenceId"

    completedByAssignmentId varchar2 (50) PATH "completedByAssignmentId."

    Cust_id varchar2 (10) PATH "cmPCCustomerInformation/customerId,"

    ACCT_SEQ varchar2 (5) PATH "customerInformation/accountId"

    AGRMT_SEQ varchar2 (5) PATH cmPCCustomerAgreement/agreementId"."

    COLL_SEQ varchar2 (5) PATH "cmPCGeneralInfo/accountCollectionSeq"

    REVENUE_CLASS varchar2 (10) PATH "cmPCCustomerAgreement/revenueClassCode"

    REQUESTED_BY varchar2 (50) PATH ' attributes customerInformation/contactName',...~50

    This ddl ran > 20 hours and no materialized view created. There are certain limits that we have

    • Cannot create a materialized view log
    • cannot change the source as its defined provider table
    • cannot do an ETL

    DB is 11g R2

    Any ideas/suggestions are very much appreciated

    I explored a similar approach, using the following test case.

    It creates a table "MASTER_TABLE" containing 20,000 lines and a CLOB containing an XML fragment like this:

    09HOLVUF3T6VX5QUN8UBV9BRW3FHRB9JFO4TSV79R6J87QWVGN

    UUL47WDW6C63YIIBOP1X4FEEJ2Z7NCR9BDFHGSLA5YZ5SAH8Y8

    O1BU1EXLBU945HQLLFB3LUO03XPWMHBN8Y7SO8YRCQXRSWKKL4

    ...

    1HT88050QIGOPGUHGS9RKK54YP7W6OOI6NXVM107GM47R5LUNC

    9FJ1JZ615EOUIX6EKBIVOWFDYCPQZM2HBQQ8HDP3ABVJ5N1OJA

    then an intermediate table "MASTER_TABLE_XML" with the same columns with the exception of the CLOB which turns into XMLType and finally a MVIEW:

    SQL > create table master_table like

    2. Select level as id

    3, cast ('ROW' | to_char (Level) as varchar2 (30)) as the name

    4       , (

    5. Select xmlserialize (content

    XMLAGG 6)

    7 xmlelement (evalname ('ThisIsElement' | to_char (Level)), dbms_random.string ('X', 50))

    8                    )

    9 as clob dash

    10                  )

    11 double

    12 connect by level<=>

    (13) as xmlcontent

    14 double

    15 connect by level<= 20000="">

    Table created.

    SQL > call dbms_stats.gather_table_stats (user, 'MASTER_TABLE');

    Calls made.

    SQL > create table (master_table_xml)

    Identification number 2

    3, name varchar2 (30)

    4, xmlcontent xmltype

    5)

    binary xmltype 6 securefile XML column xmlcontent store

    7;

    Table created.

    SQL > create materialized view master_table_mv

    2 build postponed

    full 3 Refresh on demand

    4, as

    5. Select t.id

    6, t.nom

    7       , x.*

    master_table_xml 8 t

    9, xmltable ('/ r' in passing t.xmlcontent)

    10 columns

    11 path of varchar2 (50) ThisIsElement1 'ThisIsElement1 '.

    12, path of varchar2 (50) ThisIsElement2 'ThisIsElement2 '.

    13, path of varchar2 (50) ThisIsElement3 'ThisIsElement3 '.

    14, path of varchar2 (50) ThisIsElement4 'ThisIsElement4 '.

    15 road of varchar2 (50) ThisIsElement5 'ThisIsElement5 '.

    16, road of varchar2 (50) ThisIsElement6 'ThisIsElement6 '.

    17 road of varchar2 (50) ThisIsElement7 'ThisIsElement7 '.

    18 road of varchar2 (50) ThisIsElement8 'ThisIsElement8 '.

    19 road to varchar2 (50) ThisIsElement9 'ThisIsElement9 '.

    20, path of varchar2 (50) ThisIsElement10 'ThisIsElement10 '.

    21, road to varchar2 (50) ThisIsElement11 'ThisIsElement11 '.

    22 road of varchar2 (50) ThisIsElement12 'ThisIsElement12 '.

    23 road of varchar2 (50) ThisIsElement13 'ThisIsElement13 '.

    24, path of varchar2 (50) ThisIsElement14 'ThisIsElement14 '.

    25 road of varchar2 (50) ThisIsElement15 'ThisIsElement15 '.

    26, path of varchar2 (50) ThisIsElement16 'ThisIsElement16 '.

    27, way to varchar2 (50) ThisIsElement17 'ThisIsElement17 '.

    28 road of varchar2 (50) ThisIsElement18 'ThisIsElement18 '.

    29 road of varchar2 (50) ThisIsElement19 'ThisIsElement19 '.

    30, path of varchar2 (50) ThisIsElement20 'ThisIsElement20 '.

    31, path of varchar2 (50) ThisIsElement21 'ThisIsElement21 '.

    32 road of varchar2 (50) ThisIsElement22 'ThisIsElement22 '.

    33, path of varchar2 (50) ThisIsElement23 'ThisIsElement23 '.

    34 road of varchar2 (50) ThisIsElement24 'ThisIsElement24 '.

    35 road of varchar2 (50) ThisIsElement25 'ThisIsElement25 '.

    36, road to varchar2 (50) ThisIsElement26 'ThisIsElement26 '.

    37, path of varchar2 (50) ThisIsElement27 'ThisIsElement27 '.

    38, path of varchar2 (50) ThisIsElement28 'ThisIsElement28 '.

    39, path of varchar2 (50) ThisIsElement29 'ThisIsElement29 '.

    40, road of varchar2 (50) ThisIsElement30 'ThisIsElement30 '.

    41 road of varchar2 (50) ThisIsElement31 'ThisIsElement31 '.

    42, path of varchar2 (50) ThisIsElement32 'ThisIsElement32 '.

    43, road to varchar2 (50) ThisIsElement33 'ThisIsElement33 '.

    44, path of varchar2 (50) ThisIsElement34 'ThisIsElement34 '.

    45, path of varchar2 (50) ThisIsElement35 'ThisIsElement35 '.

    46, path of varchar2 (50) ThisIsElement36 'ThisIsElement36 '.

    47, path of varchar2 (50) ThisIsElement37 'ThisIsElement37 '.

    48, path of varchar2 (50) ThisIsElement38 'ThisIsElement38 '.

    49, path of varchar2 (50) ThisIsElement39 'ThisIsElement39 '.

    50 road of varchar2 (50) ThisIsElement40 'ThisIsElement40 '.

    51, path of varchar2 (50) ThisIsElement41 'ThisIsElement41 '.

    52, path of varchar2 (50) ThisIsElement42 'ThisIsElement42 '.

    53, path of varchar2 (50) ThisIsElement43 'ThisIsElement43 '.

    54, path of varchar2 (50) ThisIsElement44 'ThisIsElement44 '.

    55 road of varchar2 (50) ThisIsElement45 'ThisIsElement45 '.

    56, path of varchar2 (50) ThisIsElement46 'ThisIsElement46 '.

    57, path of varchar2 (50) ThisIsElement47 'ThisIsElement47 '.

    58 road of varchar2 (50) ThisIsElement48 'ThisIsElement48 '.

    59 road of varchar2 (50) ThisIsElement49 'ThisIsElement49 '.

    60 road of varchar2 (50) ThisIsElement50 'ThisIsElement50 '.

    (61) x;

    Materialized view created.

    The discount is then performed in two steps:

    1. INSERT INTO master_table_xml
    2. Refresh the MVIEW

    (Note: as we insert in an XMLType column, we need an XML (only root) document this time)

    SQL > set timing on

    SQL >

    SQL > truncate table master_table_xml;

    Table truncated.

    Elapsed time: 00:00:00.27

    SQL >

    SQL > insert into master_table_xml

    2. select id

    3, name

    4, xmlparse (document '' |) XmlContent |'')

    5 master_table;

    20000 rows created.

    Elapsed time: 00:04:38.72

    SQL >

    SQL > call dbms_mview.refresh ('MASTER_TABLE_MV');

    Calls made.

    Elapsed time: 00:00:22.42

    SQL >

    SQL > select count (*) in the master_table_mv;

    COUNT (*)

    ----------

    20000

    Elapsed time: 00:00:01.38

    SQL > truncate table master_table_xml;

    Table truncated.

    Elapsed time: 00:00:00.41

  • Pivot can be used in fast refresh materialized view?

    Hi, I have a question about materialized view nested mode fast refresh on Oracle 11 g (It support function of pivot, but oracle 10 g doesn't support).

    When I created, he throws "ORA-12015: cannot create a view fast refresh materialized by a complex query.
    Then I used dbms_mview.explain_mview to see reason, and it tell me the following
    REFRESH_FAST_AFTER_INSERT ' view inline or subquery in LIST not supported for this type of MV.

    Can someone help me, any suggestions will be appreciated
    create table empX as select * from scott.emp;
alter table empX add constraint PK_empX_empno primary key (empno);

--drop  MATERIALIZED VIEW LOG ON empX;
CREATE MATERIALIZED VIEW LOG ON empX with rowid, sequence(empno);

--drop MATERIALIZED VIEW mv_empX;
CREATE MATERIALIZED VIEW mv_empX
REFRESH FAST START WITH SYSDATE
NEXT  SYSDATE + 1/1440
AS   
  select * from
  (
   select rowid emp_rowid, deptno, job, sal from empX
  )
  PIVOT( max(sal) for job IN ('ANALYST' job1, 'CLERK' job2, 'MANAGER' job3));
 
--select * from mv_capabilities_table
declare
  lv_sqltext varchar2(4000);
begin
  execute immediate 'truncate table mv_capabilities_table';
  lv_sqltext := 'select * from
  (
   select deptno, job, sal from empX
  )
  PIVOT( max(sal) for job IN (''ANALYST'' job1, ''CLERK'' job2, ''MANAGER'' job3))
  ';  
  dbms_mview.explain_mview(lv_sqltext,'nested=>TRUE');
  commit;
end;
/

    Let me help you...
    I have done following and it run/view updated because I just replaced quickly with a complete word, because there are limitations for quickly updatable views:

    SQL> show user;
USER is "SCOTT"
SQL> create table empX as select * from scott.emp;

Table created.

SQL> alter table empX add constraint PK_empX_empno primary key (empno);

Table altered.

SQL>
SQL> --drop  MATERIALIZED VIEW LOG ON empX;
SQL> CREATE MATERIALIZED VIEW LOG ON empX with rowid, sequence(empno);

Materialized view log created.

SQL>
SQL> --drop MATERIALIZED VIEW mv_empX;
SQL> CREATE MATERIALIZED VIEW mv_empX
  2  REFRESH COMPLETE WITH rowid
  3  START WITH sysdate
  4  NEXT  SYSDATE + 1/1440
  5  AS
  6    select * from
  7    (
  8     select rowid emp_rowid, deptno, job, sal from empX
  9    )
 10    PIVOT( max(sal) for job IN ('ANALYST' job1, 'CLERK' job2, 'MANAGER' job3));

Materialized view created.

SQL> select * from mv_empx;

EMP_ROWID              DEPTNO       JOB1       JOB2       JOB3
------------------ ---------- ---------- ---------- ----------
AAAShcAAEAAAATTAAN         10                  1300
AAAShcAAEAAAATTAAE         30
AAAShcAAEAAAATTAAJ         30
AAAShcAAEAAAATTAAC         30
AAAShcAAEAAAATTAAA         20                   800
AAAShcAAEAAAATTAAK         20                  1100
AAAShcAAEAAAATTAAM         20       3000
AAAShcAAEAAAATTAAD         20                             2975
AAAShcAAEAAAATTAAB         30
AAAShcAAEAAAATTAAI         10
AAAShcAAEAAAATTAAL         30                   950

EMP_ROWID              DEPTNO       JOB1       JOB2       JOB3
------------------ ---------- ---------- ---------- ----------
AAAShcAAEAAAATTAAF         30                             2850
AAAShcAAEAAAATTAAG         10                             2450
AAAShcAAEAAAATTAAH         20       3000

14 rows selected.

SQL> begin
  2  dbms_mview.refresh('SCOTT.mv_empx');
  3  end;
  4  /

PL/SQL procedure successfully completed.

SQL> select * from mv_empx;

EMP_ROWID              DEPTNO       JOB1       JOB2       JOB3
------------------ ---------- ---------- ---------- ----------
AAAShcAAEAAAATTAAN         10                  1300
AAAShcAAEAAAATTAAE         30
AAAShcAAEAAAATTAAJ         30
AAAShcAAEAAAATTAAC         30
AAAShcAAEAAAATTAAA         20                   800
AAAShcAAEAAAATTAAK         20                  1100
AAAShcAAEAAAATTAAM         20       3000
AAAShcAAEAAAATTAAD         20                             2975
AAAShcAAEAAAATTAAB         30
AAAShcAAEAAAATTAAI         10
AAAShcAAEAAAATTAAL         30                   950

EMP_ROWID              DEPTNO       JOB1       JOB2       JOB3
------------------ ---------- ---------- ---------- ----------
AAAShcAAEAAAATTAAF         30                             2850
AAAShcAAEAAAATTAAG         10                             2450
AAAShcAAEAAAATTAAH         20       3000

14 rows selected.

SQL>

    So, the answer is Yes, we can use Pivot with Materialized view but:
    1 MV must be full refresh.
    2 oracle version should be 11 g; of course the pivot is available in Oracle 11 g.

    If this answers your question, please close the message, otherwise continue.

    These links may also be of interest:
    http://docs.Oracle.com/CD/B28359_01/server.111/b28313/basicmv.htm#i1007028
    http://docs.Oracle.com/CD/B28359_01/server.111/b28313/basicmv.htm#i1007007

    http://rwijk.blogspot.in/2009/06/fast-refreshable-MATERIALIZED-view.html

    And:

    Please see if (Note: 179466.1 - view to fast refresh materialized diagnose ORA-12015 / complex queries) help.

    Concerning
    Girish Sharma

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