What is materialized views named?

Similar Questions

• What is the best way to change a column type in the materialized view?

  Hello my dear friends,.

  I want to change a column type in a materialized view. VARCHAR2 NUMBER, so what do you recommend? What is the best way to do it?

  Thank you

  You can not change the data type of the column while there are data in the MV, so you might as well give up and recreate the MV with a TO_CHAR() around the column in question in the application of MV to get the data exactly as you want (be sure to include an appropriate format mask). That said, I'm fighting to think reasonable grounds to make such a change.

• What is 'Table of container' in materialized views

  Hello

  What is meant by ' Container Table ' in materialized views?

  "Materialized view" (MV) is, in fact, a table, rather than a view.

  The term MV is used of the 9i database. In the 7 and 8 databases is the term 'snapshot' (to make things more complicated, the MV concept appeared in the 8i database, but in the context of the data warehouse).

  When you create a MV, for example. using the:

  Create materialized view emp_mv

  full refresh on demand

  as select empno, ename from EMP

  /

  you have, in fact, have created two objects in the data dictionary:

  Select object_name, object_type

  from user_objects

  where object_name = 'EMP_MV. '

  order by 1, 2;

  OBJECT_NAME OBJECT_TYPE

  --------------------- -------------------

  MATERIALIZED VIEW EMP_MV

  EMP_MV TABLE

  You can remove MV and a table of container:

  drop materialized view emp_mv;

  or you can delete only MV, preserving a table containing:

  Let fall the materialized view emp_mv maintain the table;

  Kind regards

  Zlatko

• What is a materialized view?

  If I read oradocs on flashback instructions table and it mentions

  When you delete a table, all the newspapers view materialized, defined on the table are also deleted, but are not placed in the Recycle Bin. Therefore, the materialized view logs cannot be flashed back as well as the table

  (http://docs.oracle.com/cd/B28359_01/server.111/b28286/statements_9012.htm#SQLRF01802)

  
  

  then I went to oradocs for the view materialized and read the first half logs.

  http://docs.Oracle.com/CD/B19306_01/server.102/b14200/statements_6003.htm

  Now, I know what makes a materialzed view log.

  is a materialized view as a point of view however... ?

  No, it isn't.

  A materialized view is basically a query with its 'materialized' or stored in a table results. A MV can be used by Oracle in a manner transparent re - write a query to be faster.

• 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.

• 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 automatically refresh? If the updating of the means how?

  Materialized view refresh automatically? If the updating of the means how?

  It is expected is not to ask questions of the basic documentation.

  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

• Re: view opaque and the materialized view

  Hi Experts,

  I want some clarification of opaque and view view in the physical layer OBIEE materialized

  -> what is the main difference between the opaque view and materialized in the RPD perspective view, we have to do this at the level of the RPD or DB.

  -> I want the list of opaque opinion and materialized in the RPD view how I should do.

  -> How opaque views will degrade the performance and how a materialized view will improve performance at the level of the report.

  -> In scenarios that we use view opaque and the view materialized (if possible with a scenario for the best permanent basis).

  Thanks in advance.

  I want some clarification of opaque and view view in the physical layer OBIEE materialized

  -> What is the main difference between opaque view and create the materialized view in the RPD point of view, we have to do this at the level of the RPD or DB.

  Opaque views is a SQL statement that is defined in the physical layer, OBIEE will use all in the construction of a SQL query. In a way it's not different from a database view, except it is set in OBIEE only. Alternatively, you can deploy an Opaque view, which pushes its definition in the database. Read more about it here: work with physical tables, Cubes and joins - 11 g Release 1 (11.1.1)

  A materialized view (MV) is a database concept where the results of a SQL statement are physicalised like a table, and therefore as OBIEE is a MV is just another physical array

  -> If I want a list of the opaque views and materialized in the RPD view how I should do.

  To find opaque views, use the function «Repository of applications» administration tool Search physical Tables and set up a filter on the Type = Select

  Screenshot: https://www.evernote.com/shard/s16/sh/5c843e47-bff1-4d4b-b847-be98f3a2ec09/cf060a6cd9805f687fa0b5b46f3f0020

  To find materialized views, you will need to query the catalog in your database (for example select object_name, object_type from user_objects where type_objet = "MATERIALIZED VIEW" ;) and compare it to the list of tables in your SPR)

  -> How opaque views will degrade the performance and how a materialized view will improve performance at the level of the report.

  A materialized view is materialized, in other words, the results are already stored in the database. This means usually there will be more efficient because all the joins and aggregations, etc. will be settled in advance.

• Difference between the table and Materialized View

  Is there an advantage outside automatic synchronization (founded refresh selected type) using Materialized View?

  I came across this question as table and MV both store values, and we can also update table using the code what is the need of MV? Why not create a table instead of MV with the same definition and same charly?

  I need some explanation to force someone to convince himself.

  Thank you

  http://docs.Oracle.com/CD/B19306_01/server.102/b14223/basicmv.htm

  Sections that highlight its strengths:

  1. materialized views for data warehouses

  2. materialized views for distributed computing

  Query, re - write, features as Materialized view log files that can be used for replication between databases, etc...

• utlu112i_8.SQL: be refreshed materialized views

  Document 884522.1 said to run the script utlu112i_8.sql on my version 11 GR 1 material Vision 12.1 data base, to prepare for the upgrade of GR 11, 2

  The report indicates that it materialized views being updated is

  I was checking document 1526264.1 which explains how to check if this action is busy and with all the details... but, all the SELECT statements return: no line selected.

  And later, when I run utlu112i_8.sql again, he said: materialized views are being updated

  What's not here?

  In addition the report itself does not much tip how to solve the problem, how to fix the problem? Is the report correct?

  You can see the

  Doc - ID 1358698.1)

  Down

• performance of Materialized view

  
  Hello Experts!

  I have obligation that migrate tables to materialized views.

  The current process of execution is truncate the table and updating of data that are placed on different the other schema or DB by monthly.

  (insert data into an insert like the example below)

  insert into emp (field 1, Field2,...) select field 1, field 2,... from table1, table2... joins defined.

  If I convert the tables to materialized views.

  Can I know what will be the impact of performance?

  These limited data, I can only comment on a few things from generial:

  1. with MV you don't have to worry about maintenance of the table.

  2 performance will be much better for aggregated data. The cost of Re-calculation will be reduced to a lot because it goes in the MV as a precomputed data.

  3 If you must bear the cost of the insert/update of MV, however, worry the manual activity as this will be done in real time.

• Error ORA-01115 creating the materialized view

  Hi friends,

  When I create a materialized view it by throwing some error

  CREATE THE PNR_RES_MV MATERIALIZED VIEW
  TABLESPACE FAS
  NOCACHE
  LOGGING
  NOCOMPRESS
  NOPARALLEL
  IMMEDIATE CONSTRUCTION
  REFRESH THE STRENGTH TO DEMAND
  WITH THE PRIMARY KEY
  AS
  SELECT C_CREATION_DATE, C_PNR, B.CARRIER_CD1, B.CARRIER_CD2, B.CURRENT_STATUS_CD, A.CANCELLED_IND, A.BOOKING_OFFC_NMBR,-, B.LEG_NMBR, C_PAX_NMBR
  COUNT (CASE WHEN TRIM (B.CURRENT_STATUS_CD) = "HK" AND (TRIM (C_CHANGE_OR_CANCELL_IND) = "OR C_CHANGE_OR_CANCELL_IND IS NULL) THEN 1 OTHER TRAILING NULL) CONFIRMED_COUNT,.
  COUNT (CASE WHEN (B.CURRENT_STATUS_CD) TRIM = "HK" AND (TRIM (C_CHANGE_OR_CANCELL_IND) = "or C_CHANGE_OR_CANCELL_IND IS NULL) null THEN 1 OTHER END) cancELLED_COUNT
  OF PNR_RES_LEG_PAX_MV B, PNR_RES HAS
  WHERE A.PNR = B.PNR
  AND a.CREATION_DATE = b.CREATION_DATE
  - and A.BOOKING_OFFC_NMBR = '1F'
  - AND C_PNR = 'XE76V. '
  AND A.FILE_UPDATE_DATE. A.UPDATE_DATE IN (SELECT MAX (D.FILE_UPDATE_DATE |)) (UPDATE_DATE) OF PNR_RES D WHERE D.PNR = B.PNR AND D.CREATION_DATE = B.CREATION_DATE)
  GROUP OF C_CREATION_DATE, C_PNR, B.CARRIER_CD1, B.CARRIER_CD2, B.CURRENT_STATUS_CD, A.CANCELLED_IND, A.BOOKING_OFFC_NMBR;

  
  

  
  

  When executing it it gives this error

  
  

  ORA-01115: reading block IO file error 4 (block # 63757)
  ORA-01110: data file 4: ' D:\APP\IGT\ORADATA\ORCL\USERS01. DBF'
  ORA-27070: async read/write failed
  OSD-04006: ReadFile() failure, unable to read the file
  S/O-error: (27 OS) the drive cannot find the sector requested.

  
  

  
  

  And I checked through RMAN

  RMAN > validate the audit logic datafile 4;

  From post 11 March 14
  using the control file of the target instead of recovery catalog database
  allocated channel: ORA_DISK_1
  channel ORA_DISK_1: SID = 127 type device = DISK
  channel ORA_DISK_1: starting from the data file validation
  channel ORA_DISK_1: datafile (s) for specification validation
  Enter a number of file datafile = 00004 name = D:\APP\IGT\ORADATA\ORCL\USERS01. DBF
  RMAN-00571: ===========================================================
  RMAN-00569: = ERROR MESSAGE STACK FOLLOWS =.
  RMAN-00571: ===========================================================
  RMAN-03009: failure to validate the command channel ORA_DISK_1 11/03/2014 13:0
  04:12
  ORA-19501: read error on the file 'D:\APP\IGT\ORADATA\ORCL\USERS01. DBF', block numbe
  r 63745 (block size = 8192)
  ORA-27070: async read/write failed
  OSD-04016: error queuing an asynchronous i/o request.
  S/O-error: (27 OS) the drive cannot find the sector requested.

  
  

  
  

  Please suggest me what to do it is a mistake to associate related database or OS. DB version is - 11 GR 2

  
  

  Kind regards

  
  

  Arya
  

  
  

  This is the error message that you should focus:

  > O/S-error: (27 OS) the drive cannot find the sector requested.

  Run disk checker utilities, eventually the file system is damaged.

  Hemant K Collette

• Failed to create the fast refresh on the materialized view

  Hi, I am creating a materialized on the tables with fast refresh view on commit but I get an error message.

  I have created the following logs:

  Bonus CREATE MATERIALIZED VIEW LOG ON
  Users TABLESPACE
  WITH THE PRIMARY KEY
  INCLUDING THE NEW VALUES

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

  I then try to create the following:

  Test.BAM CREATE MATERIALIZED VIEW

  IMMEDIATE CONSTRUCTION
  COOL OFF QUICKLY ON COMMIT
  AS
  SELECT a.dept_no, SUM (a.salary)
  EMPLOYEE a, b bonus
  WHERE a.employee_id = b.employee_id
  GROUP BY dept_no

  When I do that, I get the following error:

  . ORA-12032: cannot use column rowid of materialized

  view log on 'test '. "" BONUS ".

  If I change to a full refresh, it works pretty well. If I create a MV with a fast refresh on a query just within the limits of the table bonus it also works very well, for example ' select * bonus where employee_id = 2'

  What I am doing wrong? Also when looking at the notes for MV connects in some places, he said using the primary key and others, he says to the sequence of use and row_id. Which is correct and what difference does it make?

  11.2 aix.

  Thank you very much

  I suggest that investigate you the reason why your MV is not quickly updatable with the following method:

  (1) create MV_CAPABILITIES_TABLE with @?/rdbms/admin/utlxmv.sql

  (2) exec ('BAM') dbms_mview.explain_mview

  3)

  column format a100 msgtxt

  column related_text format a20

  SELECT the possible, capability_name, related_text,

  msgtxt

  OF mv_capabilities_table;

  That should tell you the reason why he isn't yet quickly updatable.

  There was a popular quote on men and fishing, but I don't remember it for now :-)

  Kind regards

  Uwe Hesse

• Materialized view: when to use a full refresh

  Thank you in advance, I read in the book of the Oracle University - "a complete refresh of a materialized view is to truncate the existing data and reinsert all data based on detail tables, re-running the query definition to CREATE order. Quick updates apply only changes since the last update. My question is what we need to complete refresh because the data in the table created for the two methods are ultimately the same and fast refresh is more "quickly"?

  Well, I don't know about the Oracle University book, but Oracle manual list a long list of restrictions when fast updating is not possible. I hope that answers your question.

  SY.

• term materialized view for update

  Hello

  Work on 10g

  I created a materialized as fast refresh view on commit.

  I need to know how long took for the update.

  I tried the below but could not get any results.

  SELECT increfreshtim FROM dba_mview_analysis, fullrefreshtim, last_refresh_date, mview_name

  Thanks in advance.

  It works for me. Post your MView definition and the output of queries, similar to what I posted.

  SQL > create table test_table as select level l, col of dbms_random.string ('A', 5) from dual connect by level<=>

  SQL > alter table test_table add constraint pk_test_table_l key (l) primary;

  SQL > create materialized view test_table; journal

  SQL > create a materialized view mv_all_objects cool off quickly in select * from test_table;

  Materialized view created.

  SQL > ed
  A written file afiedt.buf

  1. Select the owner, mview_name, last_refresh_date, refresh_method, fullrefreshtim, increfreshtim, query
  2 of dba_mview_analysis
  3 * where mview_name = 'MV_ALL_OBJECTS. '
  SQL > /.

  OWNER MVIEW_NAME REFRESH_ FULLREFRESHTIM INCREFRESHTIM QUERY LAST_REFR
  ------------------------------ ------------------------------ --------- -------- -------------- ------------- --------------------------------------------------------------------------------
  FDL_BAU MV_ALL_OBJECTS OCTOBER 8, 13 FAST 0 0 SELECT 'TEST_TABLE '. "' L ' 'L', 'TABLE_TEST '. «"COL" 'COL' OF 'TABLE_TEST' TEST_TAB «»

  -Insertion of data more

  SQL > insert test_table select 100000 + level l, col of dbms_random.string ('A', 5) from dual connect by level<=>

  SQL > exec dbms_mview.refresh ('MV_ALL_OBJECTS', 'F');

  PL/SQL procedure successfully completed.

  SQL > ed
  A written file afiedt.buf

  1. Select the owner, mview_name, last_refresh_date, refresh_method, fullrefreshtim, increfreshtim, query
  2 of dba_mview_analysis
  3 * where mview_name = 'MV_ALL_OBJECTS. '
  SQL > /.

  OWNER MVIEW_NAME REFRESH_ FULLREFRESHTIM INCREFRESHTIM QUERY LAST_REFR
  ------------------------------ ------------------------------ --------- -------- -------------- ------------- --------------------------------------------------------------------------------
  FDL_BAU MV_ALL_OBJECTS 8 OCTOBER 13 0 16 QUICK SELECT 'TEST_TABLE '. "' L ' 'L', 'TABLE_TEST '. «"COL" 'COL' OF 'TABLE_TEST' TEST_TAB «»

  SQL > drop materialized view log on test_table;

  Materialized view save ignored.

  SQL > drop mv_all_objects view materialized;

  Materialized view is deleted.

  SQL >

  The INCREFRESHTIM shows that it took 16 seconds to refresh the MView.