Wat is the use of sid in extended star schema rather than linking masterdat

hi bw gurus,
wat is the use of sid in extended star schema rather than linking masterdata with dimention tables?
thanx in advace,
i will assign points,
srinivas

hi,
the sid are used instead of the data in order to avoid the redunduncy of data.
and reduce the datastorage size.
the data will be present in the sid table and the data is linked used the corerponding sid in the dimension.
regards

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What is the use of SID?

what is the use of SID?
Why system generates?

Hi,
The use of SID are simple and well defined :
first have a good look at the Extended star schema
the SID gives a unique identity to the master data, it can be helpful for giving reference to other infocubes as well i.e. you want to share that info object[master data] with other infocubes at the same time.
system generates a numeric SID key fo each characteristics which replaces as a foreign key in the dimension table 
As in abap also a table contains a foreign key to enhance the performance and increase its(table's) usability.
some advantages of sid key:
1) fast access to data bcoz it is an automatically generated INT4 key, compared to long alpha-numeric key.
2) use of sid technique increases possibility of modelling in BIW....plz refer modelling for this to understand.
3)Query performance is enhanced.
the most important aspect of BIW is REPORTING so you can now see that the SID key how significantly increases the capability of BIW reporting.
Thanks and regards,
Rahul D
assign points if helpful........

Wat is the use of occurs

hi all
wat is the use of occurs while declaring internal table.
thankn in advance

Hi
The OCCURs Clause is used for declaring the SIZE of the Internal Table..
For EG:
Data: begin of itab occurs 0, means this will create an internal table with 8KB of memory.
But if you are specifrying
data:begin of itab occurs 10, this will create an internal table with 10 rows(according to the structure of the internal table)...
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Wat is the use of casting in field symbols

wat is the use of casting in field symbols?

When you assign a data object to a field symbol, you can cast to any data type. This means that any area of memory can be viewed as having assumed a given type. You can then address parts of fields symbolically without having to use offset/length addressing.
A cast is performed using the CASTINGaddition of the ASSIGN statement. The CASTINGaddition allows you to assign a data object to a field symbol where the type of the data object is incompatible with that of the field symbol. There are two types of casting: casting with an implicit type declaration and casting with an explicit type declaration.
For details please have a look at below link:
[Casting|http://help.sap.com/saphelp_nw70/helpdata/en/fc/eb3930358411d1829f0000e829fbfe/frameset.htm]
I hope it helps.
Thanks,
Vibha
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HT201269 I used Article: HT2109 to transfer everything from my iPod touch 3g, iOS 5.1.1, to my iPod touch 5g, iOS 6.1.3. Why did data from apps did NOT move to the new device? Games are starting over rather than picking up where they were on the old devic

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Why was the extended star schema scrapped?

Hi,
BW on HANA takes out the dimension tables and gives us back the original star schema structure.
Now my questions are
- How did the original extended star schema help the old BW on oracle or DB2 systems? I mean what was the need for such a design
- If it offered some kind of optimization .. then why was it scrapped in BW on HANA? Couldn't it have added on to the performance that HANA DB brought?
Regards,
Sam

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Regarding Extended star schema

Hi Friends,
In Extended star schema,master data will load separately ,which will connect through sid's to dimension table .
My question is.. This master data tables can be used other than this cube ?
Please tell me i am in confusion.
Thanks in advace,
Regards,
ramnaresh.

Hi
InfoCubes are made up of a number of InfoObjects. All InfoObjects (characteristics and key figures) are available independent of the InfoCube. Characteristics refer to master data with their attributes and text descriptions.
An InfoCube consists of several InfoObjects and is structured according to the star schema. This means there is a (large) fact table that contains the key figures for the InfoCube, as well as several (smaller) dimension tables which surround it. The characteristics of the InfoCube are stored in these dimensions.
An InfoCube fact table only contains key figures, in contrast to a DataStore object, whose data part can also contain characteristics. The characteristics of an InfoCube are stored in its dimensions.
The dimensions and the fact table are linked to one another using abstract identification numbers (dimension IDs) which are contained in the key part of the particular database table. As a result, the key figures of the InfoCube relate to the characteristics of the dimension. The characteristics determine the granularity (the degree of detail) at which the key figures are stored in the InfoCube.
Characteristics that logically belong together (for example, district and area belong to the regional dimension) are grouped together in a dimension. By adhering to this design criterion, dimensions are to a large extent independent of each other, and dimension tables remain small with regards to data volume. This is beneficial in terms of performance. This InfoCube structure is optimized for data analysis.
The fact table and dimension tables are both relational database tables.
Characteristics refer to the master data with their attributes and text descriptions. All InfoObjects (characteristics with their master data as well as key figures) are available for all InfoCubes, unlike dimensions, which represent the specific organizational form of characteristics in one InfoCube.
Integration
You can create aggregates to access data quickly. Here, the InfoCube data is stored redundantly and in an aggregated form.
You can either use an InfoCube directly as an InfoProvider for analysis and reporting, or use it with other InfoProviders as the basis of a MultiProvider or InfoSet.
See also:
Checking the Data Loaded in the InfoCube
If the above info is useful, please grant me points

What happens when i remove Dimension table in extended star schema

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Hi Sateesh,
Please go through this URL you will get overall Idea about Extended Star schema with DIM ID's,SID's and Data flow.
http://help.sap.com/saphelp_nw70/helpdata/EN/8d/2b4e3cb7f4d83ee10000000a114084/frameset.htm
http://help.sap.com/saphelp_nw70/helpdata/EN/8d/2b4e3cb7f4d83ee10000000a114084/frameset.htm
http://help.sap.com/saphelp_nw70/helpdata/EN/8d/2b4e3cb7f4d83ee10000000a114084/frameset.htm
I hope it will help you.
Regards
Suresh B.G.

Extended Star Schema

Hi
Right now I'm trying to implement SAP HR Infotypes into SAP BW. I try to combine 10 infotypes (all Personal Administration) into one infocube. The confusing one is that when I see my dimension, there something strange (please see below)
Dimension 1 (from PA0016)
ZDATEFROM16
ZDATETO16
ZXXX (60 character, don't have master date attribute or text)
ZYYY (30 character, don't have master date attribute or text)
ZAAA(3 character, only master data text)
Dimension 2 (from PA0023)
ZDATEFROM23
ZDATETO23
ZCCC (60 character, don't have master date attribute or text)
ZBBB (30 character, don't have master date attribute or text)
ZDDD (20 character, don't have master date attribute or text)
If i see my dimension, it seems strange because most of them don't have master data (text,attr,hierarchy).
Is this violate the extended star schema design? Thank you.
Regards,
Satria

You can use characteristics such as ZXXX without master data (text, attr, hier) in extended star schema. It is not a violation. This means in business, for this characteristic you really don't need its text, attribute or hierarchy.
When perform data modeling for you HR cube, please do consider the design, can some characteristic be attribute of another one? Will you use hierarchy such organization level for some characteristic? characteristic with text, attribute or hierachy can provide more flexibility in reporting.

Extended Star Schema doubt

Hi ALL,
Fact table --- Dimension table -
Sid Table -- master data values.
Fact table:
Contains Key Figures and Dimensional id's
Dimension table:
Contains Dim Id & SID
SID table:
SID and Master object ID ( eg: Customer ID)
Master Data Table:
contains Customer Attributes , Texts , Hierarchies for that Customer ID.
THis is the Extended Star Schema design.
MY DOUBT:
1)In Dimension table itself if we place that Customer ID(No SID table next) what will happen?
Fact table --> Dimension table --> Master data Table
2)Instead of that SID table we can directly place that CustomerID in Dimension table , so we can reduce one layer inbetween Dimendion table and Master data table.Is it correct or not?
Any one can clarify my doubt.
Regards,
Arun.M.D

SID means 'surrogate ID'. That is an system created id as you know. Main purpose is fastening the search.
Mostly, there exists a rule for Customer or Material ID's.
Like it should be CHAR 10 or CHAR 16.
This kind of alpha-numeric fields are harder to search when compared to integers. Moreover, your customer id can be 10 digits but, this does not mean you will have 1000000000 customers. This is the main reason that, an internal ID is produced. If you have 10000 customers, your SID will be at most 10000.
However, if your customer ID's are starting from 1 and growing up like integers, then your argument would be true. ( but still no way to skip SID creation and direct usage of characteristic ID in fact table)
Also, as mentioned by other friends, there exist the Line Item dimension property if you have only one characteristic in one dimension. That simply does skip the DIM ID creation step, and puts your SID into the Fact table. ( Since you have only one char in the dimension, no combination is possible)
Hope this helps.
Derya

[svn:fx-trunk] 12552: DataGroup now tracks the indices of the active virtual item renderers with a list , rather than the min/max values.

Revision: 12552
Revision: 12552
Author:   [email protected]
Date:     2009-12-04 13:45:12 -0800 (Fri, 04 Dec 2009)
Log Message:
DataGroup now tracks the indices of the active virtual item renderers with a list, rather than the min/max values.
DataGroup/addItemRendererToDisplayList() now respects the overlay.
QE notes:
Doc notes:
Bugs: sdk-24052
Reviewer:
Tests run: DataGroup, List
Is noteworthy for integration: no
Ticket Links:
    http://bugs.adobe.com/jira/browse/sdk-24052
Modified Paths:
    flex/sdk/trunk/frameworks/projects/spark/src/spark/components/DataGroup.as

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If the CSS is placed in the separate style sheet governing the total site, it doesn't work for 6.0. If placed at the top of the style sheet, conflicts of specificity prevent the menu from rendering properly in any of the browsers causing the rules for general links to govern the menu.   This has been verified using a cross browser testing. If the styles are placed at the bottom of the style sheet to help them take precedence, they work in all the browsers except for IE 6.
The website I am building needs to support IE 6 for a variety of reasons, and because it is catering to the non-profit community and to low income persons, I am mindful of even small differences in page weight.
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I would be my hope that in resolving the problem, other users of the this particular spry framework might also benefit.
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Need help with an extended star schema.

I have the following data in spreadsheet form and I need to transpose this into an extended star schema in order to prdouce my characteristics and key figures, however I'm having a little trouble understanding where to include the Product Group in the star schema and also what to do with the Sales Doc (Invoice Number) in the sales information spreadsheet.
I need to summarise the data into the following also:
1.     Total quantity and revenue for each Channel and product group
2.     Total quantity and revenue for each Channel and product group (July 2009 to September 2009)
3.      Total Quantity and Revenue for iphone sales
So my question in short is what would the star schema look like? I'm hoping somebody can help me over this hurdle.
The following are the details from the spreadsheet:
Product Details (Attributes)
File Name: Product_Details.csv
Structure     FieldName     Length     Description
     ProdID     5     Uniquely identifies a product
     PG_Group     20     Identifies products in specific groups (Navigational field)
Sample Data
ProdID,PG_Group
PDS01,COMPUTER
PDS02,COMPUTER
PDS03,COMPUTER
PDS04,ACCESSORIES
PDS05,ACCESSORIES
PDS06,ACCESSORIES
PDS07,ACCESSORIES
PDS08,HARDWARE
Product Description (Text)
File Name: Product.csv
Structure     FieldName     Length     Description
     ProdID     5     Uniquely identifies a product
     Prod_Desc     Medium Text     Represents the product description
(Navigational field)
     Language     2     Represents the language descriptor
Sample Data
ProdID,Prod_Desc,Language
PDS01,Notebook Speedy I,EN
PDS02,Notebook Speedy II,EN
PDS03,PC Thinkbox I,EN
PDS04,USB Adaptor,EN
PDS05,iPhones PX2,EN
PDS06, Stereo Kit,EN
PDS07,Camera Connector,EN
PDS08,USB Storage,EN
Transactional Data
Sales information
File Name: Sales.txt
Structure     FieldName     Length     Description
     Product     5     Uniquely identifies a product
     Sales Doc     4     Sales Document number (Invoice Number)
     Calendar Year     8     YYYYMMDD format
     Channel     1     Represents the distribution channel the product was sold by
     Quantity     4     Numeric value indicating the number of each product sold on a specific sales document
     Unit     2     Refers the unit specified by the quantity
     Revenue     8     Refers the sales amount of a specific product on a specific sales document
     Currency     3     Relates the revenue currency type
Sample Data
Product;Sales Doc ,Calendar Day,Channel,Quantity,Unit;Revenue,Currency
ZD_PROD,0DOC_NUMBER,0CALDAY,ZD_CHAN,ZD_QTY,0UNIT,ZD_REV,0CURRENCY
PDS07,7389,20090705,A,95,EA,151905,USD
PDS08,7389,20090705,A,115,EA,264385,USD
PDS02,7473,20090706,B,55,EA,3580445,USD
PDS01,7472,20090706,C,110,EA,604989,USD
PDS02,7472,20090706,C,43,EA,2799257,USD
PDS03,7472,20090706,C,75,EA,4507425,USD
PDS04,7472,20090706,A,339,EA,301032,USD
PDS06,7472,20090706,A,120,EA,47976,USD
PDS01,7473,20090718,D,55,EA,3024945,USD
PDS02,6845,20090806,B,30,EA,195297,USD
PDS07,6877,20090807,C,800,EA,12792,USD
PDS08,6877,20090807,C,250,EA,57475,USD
PDS03,6912,20090812,C,250,EA,1502475,USD
PDS04,6900,20090812,B,70,EA,6216,USD
PDS01,6899,20090812,C,12,EA,659988,USD
PDS04,6899,20090812,D,55,EA,4884,USD
PDS04,7479,20090815,C,80,EA,7104,USD
PDS05,7479,20090815,C,300,EA,70497,USD
PDS05,6809,20090818,A,1000,EA,234990,USD
PDS06,6809,20090818,A,130,EA,51974,USD
PDS03,6831,20090822,C,15,EA,901485,USD
PDS04,6831,20090822,C,500,EA,4440,USD
PDS03,6830,20090822,C,125,EA,7512375,USD
PDS06,6830,20090822,C,400,EA,15992,USD
PDS04,6841,20090825,C,53,EA,47064,USD
PDS05,6841,20090825,C,350,EA,822465,USD
Distribution Channel
Channel (text)
File Name: Channel.csv
Structure     FieldName     Length     Description
     ChanID     1     Uniquely identifies a specific distribution channel
     Chan_Desc     Medium
Text     Full name of each distribution channel
(Navigational field)
Sample Data
ChanID, Chan_Desc
A,Phone
B,Fax
C,Internet
D,Other
Star Schema Model:

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Wat is the use of sid in extended star schema rather than linking masterdat

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