Unique decimal value generated for MATERIALIZED VIEW

Similar Questions

• Source for materialized views

  Hello
  
  I'm looking for the name of the table in which the source code for materialized views is stored. For a normal view, it comes to DBA_VIEWS, burt materialized views are not in
  
  TIA
  
  Arno

  Try DBA_SNAPSHOTS or DBA_MVIEWS

• 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.

• Problem with the materialized view (ORA-02345)

  Hello

  I am trying to create a view materialized, based on the following function:

  CREATE OR REPLACE function RBS_USER.dynamic_pivot return sys_refcursor
  as
  sql_query varchar2(8000);
  p_cursor sys_refcursor;
  
  
  begin
      for x in (select distinct report_mm from UC_SOURCE_CUR_ACCT_CLASSIF order by 1)
      loop
          sql_query := sql_query || '''' || x.report_mm || ''' as "' || to_char(x.report_mm,'mm/dd/yyyy') || '", ';
      end loop;
  
  
      sql_query := 'select * from (
         select UC_BUSINESS_TYPE, PRODUCT_PORTFOLIO, REVENUE, REPORT_MM FROM UC_SOURCE_CUR_ACCT_CLASSIF
      )
      pivot
      (
         sum(revenue)
         for report_mm in (' || substr(sql_query,1,length(sql_query)-2) || '))';
  
  
      open p_cursor for sql_query;
      return p_cursor;
  end;
  
  

  I'm getting ORA-02345: cannot create a view with column based on CURSOR operator.

  How can I re - write the code in order to to use to generate a materialized view?

  Perhaps using a PIPELINED function? But the problem is that I don't know beforehand the return type that it can vary (based on a range of months in the UC_SOURCE_CUR_ACCT_CLASSIF table, which does not.

  Thank you

  M.R.

  I'm getting ORA-02345: cannot create a view with column based on CURSOR operator.

  How can I re - write the code in order to to use to generate a materialized view?

  You can't - a slider is PL/SQL, SQL not and has all the data.

  Perhaps using a PIPELINED function? But the problem is that I don't know beforehand the return type that it can vary (based on a range of months in the UC_SOURCE_CUR_ACCT_CLASSIF table, which does not.

  Then explain how a materialized view THAT REFRESH could possibly work if the return type could change after the MV was last refreshed?

  You should base a MV on real data such as returned by a SQL query.

• 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

• Parameter DBMS_METADATA. GET_DDL out of materialized views

  Hi all.
  My version of Oracle's 10g.
  
  I am extracting DDL for all database objects using the DBMS_METADATA package. I use SET_TRANSFORM_PARAM to configure the output because I need a sql code simple, without information about the attributes of storage spaces, storage and segment. Everything works well except when I work with mviews object types. I can't remove the information about the attributes of the tablespace, storage or segment for materialized views.
  
  I would like to know if there is a problem related to this topic. Or there is something missing in my code?
  
  I tried to specify the type of object such as another parameter on DBMS_METADATA. SET_TRANSFORM_PARAM but not work too.
  The only parameter transform that works very well with materialized views is the SQLTERMINATOR.
  
  ------
  See how I did:
  
  declare
  CLOB vDDL;
  Start
  DBMS_METADATA.SET_TRANSFORM_PARAM (DBMS_METADATA. SESSION_TRANSFORM 'STORAGE', FALSE);
  DBMS_METADATA.SET_TRANSFORM_PARAM (DBMS_METADATA. SESSION_TRANSFORM, 'TABLESPACE', FALSE);
  DBMS_METADATA.SET_TRANSFORM_PARAM (DBMS_METADATA. SESSION_TRANSFORM, "SEGMENT_ATTRIBUTES", FALSE);
  DBMS_METADATA.SET_TRANSFORM_PARAM (DBMS_METADATA. SESSION_TRANSFORM 'SQLTERMINATOR', TRUE);
  
  Select dbms_metadata.get_ddl ('MATERIALIZED_VIEW', 'MV_STO020', 'HIS117_CHECK') in vDDL FROM DUAL;
  dbms_output.put_line (vDDL);
  end;
  -------
  and how the output is:
  
  CREATE A MATERIALIZED VIEW 'HIS117_CHECK '. "" MV_STO020 ".
  PCTFREE 10 BUNCH OF ORGANIZATION PCTUSED 40 INITRANS MAXTRANS 255 NOCOMPRESS LOGGING 1
  STORAGE (INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645)
  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 DEFAULT USER_TABLES)
  TABLESPACE "TS_HIS117".
  IMMEDIATE CONSTRUCTION
  USING INDEX
  REFRESH THE STRENGTH TO DEMAND
  WITH A KEY PRIMARY WITH THE HELP OF DEFAULT LOCAL ROLLBACK SEGMENT
  DISABLE THE QUERY REWRITING
  IN SELECT
  STO020_MOVEMENT_LOG_ID STO020_MOVEMENT_LOG_ID
  STO020_QUANTITY STO020_QUANTITY
  STO020_DATE STO020_DATE
  STO020_BEFORE_BALANCE STO020_BEFORE_BALANCE
  STO011_PRODUCT_MOVEMENT_ID STO011_PRODUCT_MOVEMENT_ID
  ADM082_PRODUCT_ID ADM082_PRODUCT_ID
  ADM089_PRODUCT_PRESENTATION_ID ADM089_PRODUCT_PRESENTATION_ID
  STO010_MOVEMENT_TYPE_ID STO010_MOVEMENT_TYPE_ID
  STO001_STOCK_ID STO001_STOCK_ID
  STO001_TARGET_STOCK_ID STO001_TARGET_STOCK_ID
  STO003_PRODUCT_LOT_ID STO003_PRODUCT_LOT_ID
  SYS010_USER_ID SYS010_USER_ID
  EIR001_MPI EIR001_MPI
  ADM056_MEDICAL_ATTENTION_ID ADM056_MEDICAL_ATTENTION_ID
  ADM094_USE_UNIT_ID ADM094_USE_UNIT_ID
  Of
  STO020_MOVEMENT_LOG;
  
  Thank you in advance!
  
  Published by: lucporto on 08/28/2012 07:26

  The LONG data type conversion is explained on http://asktom.oracle.com if you use the search feature.
  I could not find real pointers to your original question it.

• 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 rebuild to change size of column

  We have changed the size of a varchar2 column in an OLTP table... The matte view in the warehouse pointing to this table/column complains... Is there an argument to 'rebuild' for materialized views in Oracle as I've seen in other databases? Or should I remove mast view create view Matt, create indexes and collect the tablestats to get it to pick up the new size of the column.
  
  The following statement compiles the matte view but does not pick up the new size and the matte view guard Plains.
  

  alter materialized view sms_ar.mv_sufficiency compile;

  I tried to put the argument of the 'reconstruction' on it but could not operate.

  Hi Mark,

  What is

  SQL> create table t(x varchar2(5))
  Table created.
  
  SQL> create materialized view mv
  as
    select x from t
  Materialized View created.
  
  SQL> alter table t modify x varchar2(10)
  Table altered.
  
  SQL> desc t
  TABLE t
   Name                                      Null?    Type
   ----------------------------------------- -------- -----------
   X                                                  VARCHAR2(10)
  
  SQL> desc mv
  TABLE mv
   Name                                      Null?    Type
   ----------------------------------------- -------- -----------
   X                                                  VARCHAR2(5)
  
  SQL> alter materialized view mv modify x varchar2(10)
  Materialized View altered.
  
  SQL> desc mv
  TABLE mv
   Name                                      Null?    Type
   ----------------------------------------- -------- -----------
   X                                                  VARCHAR2(10)
  

  Concerning
  Peter

• is this allowed? materialized view the log for the remote database (via db lin

  : Hi guys.
  
  try to do
  
  create materialized view log on user@xxx with sequence, rowid (col1, col2), including the new values;
  
  
  where xxx is a remote db link
  ------
  
  had this error
  
  ORA-00949 - illegal reference to the remote database
  
  Google but do not know whelther this error is an internal error or not allowed for mviews characteristic.
  
  help pleaase!
  
  Rgds,
  Noob

  do you mean that the materialized log should be created in the same location where the main table

  YES. Of course, it must be there! Any update to the main table should also update the MV log that is created against it!

  Hemant K Collette

• Rewrite Materialized View for quick update

  Hi guys,.
  
  Experts here in rewriting a mv so it will update soon?
  I used
  Run DBMS_MVIEW. EXPLAIN_MVIEW ("ESB_KLANT_FAST_MV", 2);
  and what it advice:
  * MV is not updatable quickly even with the merger of view
  * display or a subquery in LIST not supported for this type of MV
  
  There are mv-logs on each detailed with sequence, tables rowid and including the new values.
  but it will not update quickly.
  
  The PB is 9.2 so no SQL Access Advisor is available.
  
  The mv is built as below:
  
  
  CREATE A MATERIALIZED VIEW "APPS". "" ESB_KLANT_FAST_MV "ORGANIZATION BUNCH PCTFREE 0 PCTUSED 40 INITRANS 1 MAXTRANS 255 COMPRESS LOGGING STORAGE (163840 NEXT 163840 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 USER_TABLES DEFAULT INITIAL VALUE) TABLESPACE"OA_S_DATA1"CACHE BUILD WITH THE HELP OF INDEX ON REQUEST COMPLETE IMMEDIATE UPDATING
  WITH ROWID USING DEFAULT LOCAL ROLLBACK SEGMENT ENABLE QUERY REWRITE AS
  SELECT CLIENT_RELATIENUMMER per.party_number,
  rel.party_id CLIENT_REL_PARTY_ID,
  KLT.account_number CLIENT_ACCOUNT_NUMMER,
  Trim (per.party_name) NAAM,
  To_char(Prof.date_of_birth, 'DD-mm-YYYY') GEBOORTE_DATUM,
  Loc.Address1 ADRES,
  Loc.Postal_Code POSTAL code,
  Loc.City SPEND,
  Decode (Upper (Prof.Gender), ', ', 'F', 'V', 'V', 'V', NULL) GESLACHT,.
  telnr.raw_phone_number telnr,
  Mobiel.raw_phone_number mobiel,
  EMAIL_ADRES.Email_Address EMAIL_ADRES,
  Prof.person_identifier BSN_NUMMER,
  ACC.account_number DEBITEURNUMMER,
  org.party_name DEBITEURNAAM,
  ------------------------------------------------------------------------------
  ACC.account_number,
  Prof.person_identifier,
  per.person_last_name,
  Prof.date_of_birth,
  Loc.Postal_Code,
  Loc.Address1,
  Loc.City
  OF hz_parties by,
  hz_party_sites party_site,
  hz_locations loc,
  hz_person_profiles teacher,
  hz_party_relationships rel,
  hz_parties org,
  hz_cust_accounts VAC,
  hz_cust_accounts klt,
  hz_party_relationships rel1,
  hz_parties org1,
  hz_contact_points TELNR,
  hz_contact_points MOBIEL,
  hz_contact_points EMAIL_ADRES
  WHERE 1 = 1
  AND UPPER (per.party_type) = "PERSON".
  AND upper (per.status) = "A".
  AND upper (rel.party_relationship_type) = "CUSTOMER_OF".
  AND rel.subject_id = per.party_id
  AND upper (rel.status) = "A".
  AND org.party_id = rel.object_id
  AND UPPER (org.party_type) = "ORGANIZATION".
  AND upper (org.status) = "A".
  AND acc.party_id = org.party_id
  AND upper (acc.status) = "A".
  AND klt.party_id (+) = per.party_id
  AND upper (klt.status (+)) = "A".
  AND party_site.party_id = per.party_id
  AND upper (party_site.status) = "A".
  AND upper (party_site.identifying_address_flag) = "Y".
  AND loc.location_id = party_site.location_id
  AND UPPER (loc.address1) LIKE '% '.
  AND SUPERIOR (NVL (loc.city, ' ')) LIKE '% '.
  AND prof.party_id (+) = per.party_id
  AND prof.effective_end_date IS NULL
  AND TELNR.owner_table_id (+) = per.party_id
  AND MOBIEL.owner_table_id (+) = per.party_id
  AND EMAIL_ADRES.owner_table_id (+) = per.party_id
  AND upper (rel1.party_relationship_type) = "CUSTOMER_OF".
  AND upper (rel1.status) = "A".
  AND rel1.subject_id = per.party_id
  AND org1.party_id = rel1.object_id
  AND UPPER (org1.party_type) = "ORGANIZATION".
  AND upper (org1.status) = "A".
  AND upper (TELNR.owner_table_name) = "HZ_PARTIES".
  AND upper (TELNR.primary_flag) = "Y".
  AND upper (TELNR.contact_point_type) = "PHONE".
  AND upper (TELNR.phone_line_type) = "GEN."
  AND upper (TELNR.status) = "A".
  AND upper (MOBIEL.owner_table_name) = "HZ_PARTIES".
  AND upper (MOBIEL.primary_flag) = "Y".
  AND upper (MOBIEL.contact_point_type) = "PHONE".
  AND upper (MOBIEL.phone_line_type) = "MOBILE".
  AND upper (MOBIEL.status) = "A".
  AND upper (EMAIL_ADRES.owner_table_name) = "HZ_PARTIES".
  AND upper (EMAIL_ADRES.primary_flag) = "Y".
  AND upper (EMAIL_ADRES.contact_point_type) = "E-MAIL address"
  AND upper (EMAIL_ADRES.status) = "A".

  Check out this link. I hope it helps.

  link: [http://download.oracle.com/docs/cd/B10501_01/server.920/a96567/repmview.htm]

  Mike was soon

• Used in forms for rule of rounding decimal values

  I am trying to determine what district to separate the rule using forms of round numbers decimal, extracted from the database to display in a shorter length field. Specifically, when a number is equidistant from its neighbours (e.g. 0.5 is equidistant between 0 and 1), which rule is used to determine if she is rounded upwards or downwards (see this for a reference of the standard rounding rules)? The online help documentation addresses rounded, but does not specify what rounding rule is used (for example half away from zero, even half or 'Banker of the borough', etc.).

  I tried to figure this out by trial and error, but make me inconsistent results. Here's my test case...

  In the two test cases:

  Database field is NUMBER (20.4)

  Form field is numeric, length 30

  Form field format mask, programmatically, set is FM999G999G999G999G999G999G999G999G999G999G999G990D90PR (i.e., round to 2 decimal places)

  The form field displays the value of the field database directly

  Test 1:

  Database field value is 1.4445

  Result: The screen displays the value as 1.44

  Test 2:

  Database field value is 1,445

  Result: The field of the screen shows the value of 1.45

  It's completely inconsistent. If 'half away from zero' or 'half of the odd' district were used, then the value 1 of the trial must be displayed as 1.45 (because the last 5 will round the previous 4 to 5 and repeat). On the other hand, if 'half zero' or 'half similarly' district were used, the value of Test 2 should be displayed as 1.44.

  I understand that the values stored in the form are not rounded, and that this will not necessarily errors of calculation. However, it is necessary for purposes of documentation that I determine what the current rule used to display rounded values.

  I use forms GR 11, 2.

  I thought about it (by another user). My hypothesis rounded is not accurate: 1.4445 would like to round up to 1.44 mathematically, not 1.45 because 1.0045 is closer to 1 than 2. Therefore, Forms uses the standard rounded technology Oracle, which is:

  1. If n is 0, then ROUND returns always 0 regardless of the integer .
  2. If n is negative, then ROUND (n, all) returns - ROUND (-n, whole).
  3. If n is positive, then ROUND (n, integer) = FLOOR (n * POWER(10, integer) + 0.5) * POWER (10, - all over)

  Source: incompatible tie rounding rule used in Oracle Forms to the decimal values - Stack Overflow

• 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.

• Change the definition of the materialized view while maintaining access for users uninteruupted

  Hello

  We have a system report and the need to change the report definition mv access - like to do it without interruption.

  Is this possible?

  the sql behind mv was change picks up so column of another table.

  Have you heard but not used for dbms_redefinition tables

  Thank you

  It is built in the Oracle solution for this one, where you can edit the definition WITHOUT interruption. You can drop the materialized view existing with the clause "save table" and rebuilt the view materialized on 'predefined table'. I googled this example for you

  create materialized view mv1 as select dept , count(*) as cnt from scott.emp;

  We want to change the statement so that only dept more 5 will be calculated

  drop materialized view mv1 preserve table;
  

  Notice that PRESERVE TABLE clause - mv1 table is not droped - single layer mview.

  desc mv1
  

  now, we create the mview with a different query on top of the existing table

  create materialized view mv1 on prebuilt table as  select dept , count(*) as cnt from scott.emp where dept > 5;
  

  Notice that on prebuilt table the mview uses the existing object clause.

  exec dbms_mview.refresh_mview('mv1');
  

  http://StackOverflow.com/questions/18085894/redefine-MATERIALIZED-view-with-no-downtime

  http://Arup.blogspot.com/2009/01/ultra-fast-MV-alteration-using-prebuilt.html

• Elapsed time for the materialized view vs Master table query

  Hello all;
  
  Small confusion about time up for the vs Master materialized view table query
  
  

  SQL > select count (*), sum (quan_sold), sum (amt_sold) of the sale;

  COUNT (*) SUM (QUAN_SOLD) SUM (AMT_SOLD)
  6000000 12000000 720480000
  Elapsed time: 00:00:30.54
  

  SQL > create materialized view mv1
  2 activate the rewrite of the query as
  3. select count (*), sum (quan_sold), sum (amt_sold) of the sale;

  Materialized view created.
  Elapsed time: 00:00:01.45
  

  SQL > select count (*), sum (quan_sold), sum (amt_sold) of the sale;

  COUNT (*) SUM (QUAN_SOLD) SUM (AMT_SOLD)
  6000000 12000000 720480000
  Elapsed time: 00:00:00.01
  
  Please see the three cases "Elapsed Time"...
  
  When comparing other cases.
  1. my query takes long time (30.54), extraction of data from the sale
  2. create a materialized view takes less time (01:45) why?
  
  Source: http://uhesse.com/2009/07/08/brief-introduction-into-materialized-views/

  >
  Small confusion about elapsed time for the materialized view vs Master table query

  SQL > select count (*), sum (quan_sold), sum (amt_sold) from the sale.

  COUNT (*) SUM (QUAN_SOLD) SUM (AMT_SOLD)
  6000000 12000000 720480000
  Elapsed time: 00:00:30.54

  SQL > create materialized view mv1
  2 activate the rewrite of the query as
  3. select count (*), sum (quan_sold), sum (amt_sold) of the sale;
  Materialized view created.
  Elapsed time: 00:00:01.45

  SQL > select count (*), sum (quan_sold), sum (amt_sold) from the sale.

  COUNT (*) SUM (QUAN_SOLD) SUM (AMT_SOLD)
  6000000 12000000 720480000
  Elapsed time: 00:00:00.01

  Please see the three cases "Elapsed Time"...

  When comparing other cases.
  1. my query takes long time (30.54), extraction of data from the sale
  2. create a materialized view takes less time (01:45) why?
  >
  Many queries take less time the second time you run them. After the first performance, there may be many, if not all, lines in the buffer cache. Then the second round will not make any or all e/s physical but will obtain data from the buffer cache.

  Also, you haven't checked that the MV was even used for the second run.

  Drop the MV and make the query several times and means of the time. Then create the MV and do the same thing.

• Recommendation for the materialized view

  Hello
  
  I am looking for Oracle Materialized View recommendation in the 9i version.
  I searched in the Oracle9i Data Warehousing Guide at http://download.oracle.com/docs/cd/B10501_01/server.920/a96520.pdf.
  Do you have any information?
  Thank you.

  Depends on what you're trying to accomplish. What would it be?