Query on Usage of Architectural view

Hi Friends,
As in RE-FX we have the architectural view as optional, is it possible to proceed with usage view configs and later on after go live can we configure the architectural view. Because as of now the structure in the architectural view cannot be freeze it'll be provided by the bpo later down the line.
Can any one please give some information on this scenario, are there any drawbacks of it?
Your response is highly appereciated.
Thanks & Regards

HI,
You can go ahead... i don't find any major issues.
One thing i have noticed in such scenario is
when you load the architectural master data and link to Usage view, the measurements in Usage view master data ( for example Business entity ) will be deleted by the system. This is my observation.
You need to take care of this.
Enjoy..
Siva

Similar Messages

Use evdre to query data from a SQL View

Hi all
I believe that it is possible to use evdre to query data from a SQL View. If this is possible then how does one go about setting it up in the evdre options (assuming that the view has already been created)?
Regards,
Byron

Byron, perhaps this is no longer supported, it might be worth opening up a case at service.sap.com on this. However, I did find the following on Page 11 of the "Usages and Considerations of EVDRE" pdf file. This doc is imbedded in the helpfile for BPC 7 SP5 (which was released in August of 2009, well after note 1315011 was last updated.
It looks like you are limited to one custom view per application, since you have to name the view in a parameter at the APPLICATION level. Go into BPC Administration, login to the application related to the custom view, choose "Set Application Parameters" and enter the name of the view to the Application Parameter called "EVDRE_QUERYVIEWNAME" If it is not listed, go ahead and create it at the bottom of the Application parameter screen.
Also: I interpreted the following info from Page 10 of the same doc:
In your EVDRE, set the following options:
QueryEngine: MANUAL
QueryType: enter either NEXJ OR TUPLE see below:
NEXJ - Use two-dimensional queries using the nonemptycrossjoin function
TUPLE - Use two-dimensional queries using tuples"
And I'm assuming you'd enter a Y for the following two parameters:
QueryViewName
"..to enforce the query engine to use a used-defined SQL view of the fact tables, when trying to read the values using SQL queries. This option is typically used in conjunction with the SQLOnly option (see below). "
Option SQLOnly
"..to enforce the query engine to only execute SQL queries, when reading data. This can be achieved using this option."

Query rewrites with Nested materialized views with different aggregations

Platform used : Oracle 11g.
Here is a simple fact table (with measures m1,m2) and dimensions (a) Location (b) Calendar and (c) Product. The business problem is that aggregation operator for measure m1,m2 are different along location dimension and Calendar dimension. The intention is to preaggregate the measures for a product along the calendar dimension and Location dimension and store it as materialized views.
The direct option is to define a materialized view with Inline queries (Because of the different aggrergation operator, it is not possible to write a query without Inline query). http://download-uk.oracle.com/docs/cd/B28359_01/server.111/b28313/qradv.htm#BABEAJBF documents the limitations that it works only for 'Text match' and 'Equivalent queries' and that is too limiting.
So decided to have nested materialized view, with first view having just joins(my_dim_mvw_joins), the second view having aggregations along Calendar dimension (my_dim_mvw_calendar) and third view having aggregations along the Location dimension(my_dim_mvw_location). Obviously I do not want the query I fire to know about materialized views and I fire it against the fact table. I see that for the fired query (Which needs aggregations along both Calendar and Location), is rewritten with just second materialized view but not the third. (Had set QUERY_REWRITE_INTEGRITY as TRUSTED) .
Wanted to know whether there are limitations on Query Writes with nested materialized views? Thanks
(Have given a simple testable example below. Pls ignore the values given in 'CALENDAR_IDs', 'PRODUCT_IDs' etc as they are the same for all the queries)
-- Calendar hierarchy table
CREATE TABLE CALENDAR_HIERARCHY_TREE
(     "CALENDAR_ID" NUMBER(5,0) NOT NULL ENABLE,
"HIERARCHY1_ID" NUMBER(5,0),
"HIERARCHY2_ID" NUMBER(5,0),
"HIERARCHY3_ID" NUMBER(5,0),
"HIERARCHY4_ID" NUMBER(5,0),
CONSTRAINT "CALENDAR_HIERARCHY_TREE_PK" PRIMARY KEY ("CALENDAR_ID")
-- Location hierarchy table
CREATE TABLE LOCATION_HIERARCHY_TREE
(     "LOCATION_ID" NUMBER(3,0) NOT NULL ENABLE,
"HIERARCHY1_ID" NUMBER(3,0),
"HIERARCHY2_ID" NUMBER(3,0),
"HIERARCHY3_ID" NUMBER(3,0),
"HIERARCHY4_ID" NUMBER(3,0),
CONSTRAINT "LOCATION_HIERARCHY_TREE_PK" PRIMARY KEY ("LOCATION_ID")
-- Product hierarchy table
CREATE TABLE PRODUCT_HIERARCHY_TREE
(     "PRODUCT_ID" NUMBER(3,0) NOT NULL ENABLE,
     "HIERARCHY1_ID" NUMBER(3,0),
     "HIERARCHY2_ID" NUMBER(3,0),
     "HIERARCHY3_ID" NUMBER(3,0),
     "HIERARCHY4_ID" NUMBER(3,0),
     "HIERARCHY5_ID" NUMBER(3,0),
     "HIERARCHY6_ID" NUMBER(3,0),
     CONSTRAINT "PRODUCT_HIERARCHY_TREE_PK" PRIMARY KEY ("PRODUCT_ID")
-- Fact table
CREATE TABLE RETAILER_SALES_TBL
(     "PRODUCT_ID" NUMBER,
"PRODUCT_KEY" VARCHAR2(50 BYTE),
"PLAN_ID" NUMBER,
"PLAN_PERIOD_ID" NUMBER,
"PERIOD_ID" NUMBER(5,0),
"M1" NUMBER,
"M2" NUMBER,
"M3" NUMBER,
"M4" NUMBER,
"M5" NUMBER,
"M6" NUMBER,
"M7" NUMBER,
"M8" NUMBER,
"LOCATION_ID" NUMBER(3,0),
"M9" NUMBER,
CONSTRAINT "RETAILER_SALES_TBL_LOCATI_FK1" FOREIGN KEY ("LOCATION_ID")
REFERENCES LOCATION_HIERARCHY_TREE ("LOCATION_ID") ENABLE,
CONSTRAINT "RETAILER_SALES_TBL_PRODUC_FK1" FOREIGN KEY ("PRODUCT_ID")
REFERENCES PRODUCT_HIERARCHY_TREE ("PRODUCT_ID") ENABLE,
CONSTRAINT "RETAILER_SALES_TBL_CALEND_FK1" FOREIGN KEY ("PERIOD_ID")
REFERENCES CALENDAR_HIERARCHY_TREE ("CALENDAR_ID") ENABLE
-- Location dimension definition to promote query rewrite
create DIMENSION LOCATION_DIM
LEVEL CHAIN IS LOCATION_HIERARCHY_TREE.HIERARCHY1_ID
LEVEL CONSUMER_SEGMENT IS LOCATION_HIERARCHY_TREE.HIERARCHY3_ID
LEVEL STORE IS LOCATION_HIERARCHY_TREE.LOCATION_ID
LEVEL TRADING_AREA IS LOCATION_HIERARCHY_TREE.HIERARCHY2_ID
HIERARCHY PROD_ROLLUP (
STORE CHILD OF
CONSUMER_SEGMENT CHILD OF
TRADING_AREA CHILD OF
CHAIN
-- Calendar dimension definition
create DIMENSION CALENDAR_DIM
LEVEL MONTH IS CALENDAR_HIERARCHY_TREE.HIERARCHY3_ID
LEVEL QUARTER IS CALENDAR_HIERARCHY_TREE.HIERARCHY2_ID
LEVEL WEEK IS CALENDAR_HIERARCHY_TREE.CALENDAR_ID
LEVEL YEAR IS CALENDAR_HIERARCHY_TREE.HIERARCHY1_ID
HIERARCHY CALENDAR_ROLLUP (
WEEK CHILD OF
MONTH CHILD OF
QUARTER CHILD OF
YEAR
-- Materialized view with just joins needed for other views
CREATE MATERIALIZED VIEW my_dim_mvw_joins build immediate refresh complete enable query rewrite as
select product_id, lht.HIERARCHY1_ID, lht.HIERARCHY2_ID, lht.HIERARCHY3_ID, lht.location_id, cht.HIERARCHY1_ID year,
cht.HIERARCHY2_ID quarter, cht.HIERARCHY3_ID month, cht.calendar_id week, m1, m3, m7, m9
from retailer_sales_tbl RS, calendar_hierarchy_tree cht, location_hierarchy_tree lht
WHERE RS.period_id = cht.CALENDAR_ID
and RS.location_id = lht.location_id
and cht.CALENDAR_ID in (10,236,237,238,239,608,609,610,611,612,613,614,615,616,617,618,619,1426,1427,1428,1429,1430,1431,1432,1433,1434,1435,1436,1437,1438,1439,1440,1441,1442,1443,1444,1445,1446,1447,1448,1449,1450,1451,1452,1453,1454,1455,1456,1457,1458,1459,1460,1461,1462,1463,1464,1465,1466,1467,1468,1469,1470,1471,1472,1473,1474,1475,1476,1477)
AND product_id IN (5, 6, 7, 8, 11, 12, 13, 14, 17, 18, 19, 20)
AND lht.location_id IN (2, 3, 11, 12, 13, 14, 15, 4, 16, 17, 18, 19, 20)
-- Materialized view which aggregate along calendar dimension
CREATE MATERIALIZED VIEW my_dim_mvw_calendar build immediate refresh complete enable query rewrite as
select product_id, HIERARCHY1_ID , HIERARCHY2_ID , HIERARCHY3_ID ,location_id, year, quarter, month, week,
sum(m1) m1_total, sum(m3) m3_total, sum(m7) m7_total, sum(m9) m9_total,
GROUPING_ID(product_id, location_id, year, quarter, month, week) dim_mvw_gid
from my_dim_mvw_joins
GROUP BY product_id, HIERARCHY1_ID , HIERARCHY2_ID , HIERARCHY3_ID , location_id,
rollup (year, quarter, month, week);
-- Materialized view which aggregate along Location dimension
CREATE MATERIALIZED VIEW my_dim_mvw_location build immediate refresh complete enable query rewrite as
select product_id, year, quarter, month, week, HIERARCHY1_ID, HIERARCHY2_ID, HIERARCHY3_ID, location_id,
sum(m1_total) m1_total_1, sum(m3_total) m3_total_1, sum(m7_total) m7_total_1, sum(m9_total) m9_total_1,
GROUPING_ID(product_id, HIERARCHY1_ID, HIERARCHY2_ID, HIERARCHY3_ID, location_id, year, quarter, month, week) dim_mvw_gid
from my_dim_mvw_calendar
GROUP BY product_id, year, quarter, month, week,
rollup (HIERARCHY1_ID, HIERARCHY2_ID, HIERARCHY3_ID, location_id)
-- SQL Query Fired (for simplicity have used SUM as aggregation operator for both, but they will be different)
select product_id, year, HIERARCHY1_ID, HIERARCHY2_ID,
sum(m1_total) m1_total_1, sum(m3_total) m3_total_1, sum(m7_total) m7_total_1, sum(m9_total) m9_total_1
from
select product_id, HIERARCHY1_ID , HIERARCHY2_ID , year,
sum(m1) m1_total, sum(m3) m3_total, sum(m7) m7_total, sum(m9) m9_total
from
select product_id, lht.HIERARCHY1_ID , lht.HIERARCHY2_ID , lht.HIERARCHY3_ID ,lht.location_id, cht.HIERARCHY1_ID year, cht.HIERARCHY2_ID quarter, cht.HIERARCHY3_ID month, cht.calendar_id week,m1,m3,m7,m9
from
retailer_sales_tbl RS, calendar_hierarchy_tree cht, location_hierarchy_tree lht
WHERE RS.period_id = cht.CALENDAR_ID
and RS.location_id = lht.location_id
and cht.CALENDAR_ID in (10,236,237,238,239,608,609,610,611,612,613,614,615,616,617,618,619,1426,1427,1428,1429,1430,1431,1432,1433,1434,1435,1436,1437,1438,1439,1440,1441,1442,1443,1444,1445,1446,1447,1448,1449,1450,1451,1452,1453,1454,1455,1456,1457,1458,1459,1460,1461,1462,1463,1464,1465,1466,1467,1468,1469,1470,1471,1472,1473,1474,1475,1476,1477)
AND product_id IN (5, 6, 7, 8, 11, 12, 13, 14, 17, 18, 19, 20)
AND lht.location_id IN (2, 3, 11, 12, 13, 14, 15, 4, 16, 17, 18, 19, 20)
GROUP BY product_id, HIERARCHY1_ID , HIERARCHY2_ID , HIERARCHY3_ID , location_id, year
) sales_time
GROUP BY product_id, year,HIERARCHY1_ID, HIERARCHY2_ID
This Query rewrites only with my_dim_mvw_calendar. (as saw in Query Plan and EXPLAIN_MVIEW). But we would like it to use my_dim_mvw_location as that has aggregations for both dimensions.

blackhole001 wrote:
Hi all,
I'm trying to make my programmer's life easier by creating a database view for them to query the data, so they don't have to worry about joining tables. This sounds like a pretty horrible idea. I say this because you will eventually end up with programmers that know nothing about your data model and how to properly interact with it.
Additionally, what you will get is a developer that takes one of your views and see's that of the 20 columns in it, it has 4 that he needs. If all those 4 columns comes from a simple 2 table join, but the view has 8 tables, you're wasting a tonne of resources by using the view (and heaven forbid they have to join that view to another view to get 4 of the 20 columns from that other view as well).
Ideally you'd write stored routines that satisfy exactly what is required (if you are the database resource and these other programmers are java, .net, etc... based) and the front end developers would call those routines customized for an exact purpose.
Creating views is not bad, but it's by no means a proper solution to having developers not learn or understand SQL and/or the data model.

Query Dictionary tables and V$ views in EM

Hello;
I want to query dba_ tables and v$ views from Enterprise manager (10g).
I hv tried that in the Tables -> SYS schema ; But these tables are not shown there. Im unable to query from the EM.
Able to query from the sql plus , Where i have logged as SYS
select status from v$instance;
From where can i access these tables; (in EM)
v$instance
v$database
dba_tablespaces
Edited by: Zerandib on Dec 8, 2009 8:39 AM

Zerandib wrote:
From where can i access these tables; (in EM)
v$instance
v$database
dba_tablespaces
Those are not tables, they are views. Try looking under Adminstration|Schema|Views with schema as SYS. Keep in mind many of the V$ names, such as V$INSTANCE, are public synonyms for V_$ views. For example V$INSTANCE is a public synonym for V_$INSTANCE.

Query to find all the view name and their size in GB

Hi,
What is the query to find all the view name and their size in GB.I am aware of joining all_views and user_segments but this is not serving the purpose.is there any table i need to join to get the desired result
Thanks

You could of course be thinking of views as they are stored in other RDBMS' as some of them actually create the view as a table on the database with a copy of the data in it and maintain that data as the base tables are updated.
As already mentioned, Oracle just stores the SQL of the View and executes that SQL when the view is queried.
Alternatively, Oracle also has "materialized views" which are created as snapshots of the data and will have a size. This data is updated (refreshed) based on the parameters used when creating the materialized view which means that it will either be, commonly, when a commit is issued or when a refresh is explicitly requested (refresh on demand).

Query Regarding Fetching of Maintenance View

Hi Experts
I have one query regarding fetching of Maintenance View.
My Maintenance View is consisting of only one table.
so i am unable to fetch the data using inner join.i also found
one FM VIEW_GET_DATA which fetches entire table with out
any condition it may lead to performance issue. kindly suggest
how do i fetch the data from such Maintenance View.
Thanks
Nishita G

Hi,
You can Direct Use the DML operations on the Underlying Database Table.( example 'SELECT' Statement and use 'WHERE' Condition for required output ).
Regards
Pavan Kumar

CAD screen in architectural view

Hi;
I want to show CAD screen in architectural view. I included CAD screen(REGI01) in architectural view for building object. Then from re80 , i chose architecurl object for building but i couldn't find CAD screen.
I would like to know that is there any need for 3rd party application or i did misconfiguration?

Hi,
The same can be done by document management system in SAP REFX. The link is available in SPRO under General Settings for Master Data and Contract > Document Management.
Also for dynamic reports please find interesting solutions for a SAP RE-FX CAD-Integration here:
http://www.cideon.de/cideon/en/so/produkte/sap_alm/index.php
Regards
Neel

Index usage and nested views

We've got some performance problems when using a complex view that queries against a couple nested views.
We need to use views because we have two outer joins against the same table.
Here's a simplified version:
create or replace view_b as
select a1, b1, c1, d1
from table_c, table_d, view_a
where table_c.c1 = view_a.a1(+)
and table_c.c2= table_d.d1
create or replace view_a as
select a1
from table_a, table_b
where table_a.a1 = table_b.b1(+)
A query that may present problems with large amounts of data is:
select a1, b1
from view_b
where a1 = 1234;
Do indexes of nested views get utilized? Any suggestions?
Thanks

How selective is INSTRUMENT_ID? Is that a primary key? Or are there many rows in the INSTRUMENT table with an INSTRUMENT_ID of 1?
Are the statistics on your table and your index up to date? How, precisely, were statistics gathered?
What version of Oracle are you using? If you are using something earlier than 11.1, it's entirely possible that you have a bind variable peeking problem.
Realistically, you would want Oracle to use two different query plans for this statement depending on the value of the bind variable. If you pass in a NULL, you'd want Oracle to do a table scan. If you pass in a value, you'd want Oracle to do an index scan. Prior to 11.1, when this statement is first parsed, Oracle looks at the bind variable you passed in and picks the best plan for that bind variable value. When you subsequently execute this statement with other bind variable values, that first query plan is used. Thus, if the first time this code was executed you passed in a NULL, it would have made sense for Oracle to choose the table scan and all subsequent executions (until the query was aged out of the shared pool) would continue to use that query plan.
Oracle 11.1 introduced the ability to have multiple query plans for the same query depending on the bind variable values that were passed in which may well alleviate the problem you're seeing.
Justin

How to create olap cube using Named Query Table in Data source View

I Create on OLAP Cube using Existing Tables Its Working Fine But When i Use Named Query Table with RelationShip To other Named query Table It Not Working .So give me some deep Clarification On Olap Cube for Better Understanding
Thanks

Hi Pawan,
What do you mean "It Not Working"？ As Kamath said, please post the detail error message, so that we can make further analysis.
In the Data Source View of a CUBE, we can define a named query. In a named query, you can specify an SQL expression to select rows and columns returned from one or more tables in one or more data sources. A named query is like any other table in a data source
view (DSV) with rows and relationships, except that the named query is based on an expression.
Reference:Define Named Queries in a Data Source View (Analysis Services)
Regards,
Charlie Liao
TechNet Community Support

Is there a way to exclude temporary people picker fields from a query when receiving the "List View Lookup Threshold" error.

Hi All,
My users require the ability to select a sharepoint group from a drop down list and then be able to select a user from a people picker based on the drop down selection.    The best solution I was able to up with, was create a people picker
for each drop down selection and set the Sharepoint group field to the selected group.  All people picker filed are hidden except the one that matches the drop down selection. When creating an entry from the sharepoint list this method
works perfectly.
However, when I add the list onto a site page using an "Listview webpart", then add an infopath web part and then finally connect the two parts, I get a "List View Lookup Threshold" error when selecting an entry from the list. I
understand from the error and reading that this error is related to the number of People pickers in the list.   Is there a way to exclude temporary people picker fields from a site page query, as they are only temporary fields to allow the users
to select a person and then assign the name to another field.
Dwayne

Hi Dwayne,
In SharePoint 2013, we could manually create a list for all users. Here are the reference:
Go to Site Settings > People and Groups > SiteMembers
Modify url
http://sitename/_layouts/15/people.aspx?MembershipGroupId=8 to
http://sp/sites/tutu/_layouts/15/people.aspx?MembershipGroupId=0 , now you will see All people in this site.
Change the view to List view, and copy the listview id in the url
http://sitename/_layouts/15/people.aspx?MembershipGroupId=0&View={viewID}
Go to Settings > List settings, copy the list id in the url
http://sitename/_layouts/15/listedit.aspx?List=listeid&Source=....
Now type the address in IE:
http://sitename/_vti_bin/owssvr.dll?CS=109&Using=_layouts/query.iqy&List=[LISTID]&View=[VIEWID]&CacheControl , such as
http://sp/sites/tutu/_vti_bin/owssvr.dll?CS=109&Using=_layouts/query.iqy&List=f3958d27-9c2f-4f8d-b221-89466e816667&View=696BFDC5-0C6E-4E27-818F-0E6292A18407&CacheControl=1
Save the owssvr.jqy from SharePoint site
Now you could see the file in your desktop with all users, save it as allusers in Excel.
Then import it to your SharePoint site, add an app > find an app > import spreadsheet
Regards,
Rebecca Tu
TechNet Community Support

Query and update a table/view

What is the best & fastest way to do this?
1) Put up a query input region for users to enter parameters.
2) Run a query on a table/view using those parameters.
3) Allow the output in (2) to be modified by user (multiple rows at a time) and then Submit the updates back to update th table/view
I can do (1) and (2) easily. How can I do (3)?
Thanks

Make a report on the table. Go to the definition of
the report column and change the "Display As" type to
text field or select list or whcih ever is
applicable. Write a process on submit to insert these
values back to the table. You will have control over
which columns the user can modify.Thats a good idea and I was able to start on it. But how can my after submit process tell which rows to modify? i.e. what will my after submit process look like?
for rec in (....)
loop
update my_table set
end loop;
Help? Thanks

Querying data from the maintenance view.

Hi Experts,
Well, i need the STEXT field value from the maintanance view V_T591A created for the standard table T591A.
Table T591A has the field Subtype but doesn't have the field Stext, which consists the description of the subtype. The Stext field is there in the maintenance view V_T591A.
So, if i want to query the respective description of the specific subtype, how do i get the values from the maintenance view?
Please advice.
Thanks in anticipation to all!
Cheers,
Sundar.

Atish,
It is not possible that way! U cannot Query directly from MV as a DB table.
Anyways, i managed to find the answer.
Thanks though.
Regards,
Sundar.

Query Issue in Creating a View....Please help me with this query..

I would like to create a view on this table with four columns
1. PN#_EXP_DATE
2. PN#
3. PN#_EFF_DATE
4. PN#
P_S_C     A_C     P     EXP_DT
21698     13921     1     5/29/2009 3:15:41 PM
21698     13921     1     5/29/2009 3:54:57 PM
21698     1716656     4     5/29/2009 3:15:41 PM
21698     3217     3     5/29/2009 3:15:40 PM
21698     3217     3     5/29/2009 3:54:57 PM
21698     60559     2     5/29/2009 3:15:41 PM
21698     60559     2     5/29/2009 3:54:57 PM
I have a trigger on A, which inserts the DML records into B. (Table A and B structure is the almost the same,
                                   where table B will have one extra column exp_dt)
NOw Table B can have records with same P_S_C and A_C columns and exp_dt will capture the history.
for example: from the above sample data, let us take first two records..
P_S_C     A_C     P     EXP_DT
21698     13921     1     5/29/2009 3:15:41 PM     --- Record 1
21698     13921     1     5/29/2009 3:54:57 PM     --- Record 2
from this..
Note: 1. Table A and Table C can be joined using A.P_S_C and C.R_C to get the start_date.
2. PN# comes from table D. It contains numbers for the resp. weeks.
3. PN#_EFF_DATE is the previous immediate previous date for that record in history table (Table B).
I wanted the data like..
---- this is for the second record in the above..
PN#_EXP_DATE PN# PN#_EFF_DATE PN#
5/29/2009 3:54:57 PM     214 5/29/2009 3:15:41 PM     214
---- this is for the first record in the above..
PN#_EXP_DATE PN# PN#_EFF_DATE PN#
5/29/2009 3:54:41 PM     214 ( for this we should query the table C to get the
                    start_date, for this combinatation of P_S_C and A_C in table B
                         where B.P_S_C = C.A_C
                         and that value should be the EFF_DT for this record)
Please help me with this....
Thanks in advance..

Hi All,
select d.P# as "PN#_EXP_DATE", exp_date
from daily_prd d, cbs1_assoc_hist b
where to_char(d.day_date,'MM/DD/YYYY') = to_char(b.exp_date,'MM/DD/YYYY')
and d.period_type = 'TIMEREPORT';
This above query gives the output as follows:
pn#_exp_date exp_date
214     5/29/2009 3:15:40 PM
214     5/29/2009 3:15:41 PM
214          5/29/2009 3:15:41 PM
214          5/29/2009 3:15:41 PM
214          5/29/2009 3:54:57 PM
214          5/29/2009 3:54:57 PM
214          5/29/2009 3:54:57 PM
This below is the data from history table (Table B).
P_S_C     A_C PLACE EXP_DATE
21698          3217          3     5/29/2009 3:15:40 PM
21698          13921          1     5/29/2009 3:15:41 PM
21698          1716656          4     5/29/2009 3:15:41 PM
21698          60559          2     5/29/2009 3:15:41 PM
21698          13921          1     5/29/2009 3:54:57 PM
21698          3217          3     5/29/2009 3:54:57 PM
21698          60559          2     5/29/2009 3:54:57 PM
I got the pn#_exp_date from the Table 'D', for the given exp_date from Table B.
My question is again....
CASE - 1
from the given records above, I need to look for exp_date for the given same P_S_C and A_C.
in this case we can take the example...
P_S_C     A_C PLACE EXP_DATE
21698          3217          3     5/29/2009 3:15:40 PM
21698          3217          3     5/29/2009 3:54:57 PM
In this case, the
pn#_exp_date exp_date     pn#_eff_date eff_date
214     5/29/2009 3:15:57 PM     < PN# corresponding to the     5/29/2009 3:15:40 PM
                    eff_date .>
                    <Basically the eff_date is
                    nothing but the exp_date only.
                    we should take the immediate before one.
In this case, our eff_date is '5/29/2009 3:15:40 PM'.
but how to get this.
CASE - 2
from the above sample data, consider this
P_S_C     A_C PLACE EXP_DATE
21698     1716656     4     5/29/2009 3:15:41 PM
In this case, there is only one record for the P_S_C and A_C combination.
The expected result :
pn#_exp_date exp_date               pn#_eff_date eff_date
214     5/29/2009 3:15:41 PM     < PN# corresponding to the     5/29/2009 3:15:40 PM
                    eff_date .>
               <Basically the eff_date is
               nothing but the exp_date only.
                    we should take the immediate before one.
In this case to get the eff_date, we should query the Table 'C', to get the eff_date, which is START_DT column in this table.
for this join B.P_S_C and C.R_C.
Hope I am clear now..
Thanks in advance.....

Query rewrite usage

is there a way to log how often materialized views are accessed in general or by query rewrite enabled option?
i would like to find out which materialized views are useless, because they are never used by query rewrite.

890408 wrote:
is there a way to log how often materialized views are accessed in general or by query rewrite enabled option?
i would like to find out which materialized views are useless, because they are never used by query rewrite.How about you check the mview properties from the view mv_capabilities_table ?
Aman....

Query Rewrite with regular database Views

Hi all,
I'm trying to make my programmer's life easier by creating a database view for them to query the data, so they don't have to worry about joining tables. However, query rewrite doesn't work no matter how I define the MV and View. Here's an example:
I've Sales tables with columns: PDate, CustCode, Amount
and Customer table with columns: CustCode, CustDesc
I create a view SALES_V with columns: PDate, CustCode, CustDesc, Amount by joining Sales table with Customer table as follows:
create or replace view SALES_V as
select PDate, c.CustCode, c.CustDesc, Amount
from Sales s
join Customer c on (s.CustCode=c.CustCode);
For the sake of speed, I create a materialized view SALES_TOT_MV with columns: PDate, Amount with the following SQL:
create materialized view SALES_TOT_MV
enable query rewrite
as select PDate, sum(Amount) Amount from Sales
group by PDate;
When I run the following query, I expect it to be rewritten to make use of SALES_TOT_MV:
select PDate, sum(Amount) from SALES_V
group by PDate;
However, explain plan always tell me it's using SALES table, not the SALES_TOT_MV.
Can somebody tell me it's a limitation of Oracle optimizer or I'm just missing something for this?
Thanks in advance!!
- Andrew
Edited by: blackhole001 on Jan 28, 2010 12:34 PM

blackhole001 wrote:
Hi all,
I'm trying to make my programmer's life easier by creating a database view for them to query the data, so they don't have to worry about joining tables. This sounds like a pretty horrible idea. I say this because you will eventually end up with programmers that know nothing about your data model and how to properly interact with it.
Additionally, what you will get is a developer that takes one of your views and see's that of the 20 columns in it, it has 4 that he needs. If all those 4 columns comes from a simple 2 table join, but the view has 8 tables, you're wasting a tonne of resources by using the view (and heaven forbid they have to join that view to another view to get 4 of the 20 columns from that other view as well).
Ideally you'd write stored routines that satisfy exactly what is required (if you are the database resource and these other programmers are java, .net, etc... based) and the front end developers would call those routines customized for an exact purpose.
Creating views is not bad, but it's by no means a proper solution to having developers not learn or understand SQL and/or the data model.

Query on Usage of Architectural view

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