Generic Data vs Generic Delta

Hello,
When do we use Generic Data Extraction?
When do we use Generic Delta Extraction?
Thanks

Roshan,
When you create a Generic DataSource you have the option to make it support delta functionality using your specified charactetistics which will be used to track deltas for example document date etc....
We create a Generic DataSource if the existing BC does not provide a standard datasource for the same.
Whether you want it to be delta enabled or not it depends on your scenario.
Hope this helps.....

Similar Messages

Master Data-Generic Delta

hello guys
I have some doubts when it comes Generic Extraction of Master Data from a source system(say SAP R3) with possible deltas...
1.I heard from my friend,that while working with Master Data Generic Extraction (involving deltas),we generally do FULL LOADS....itsnot a common practise to do initialisation and then delta update as in the case of Transaction Data...Is that true?
I know that it varies from case to case,but generally speaking,how often do we do these FULL LOADS?
2.Suppose,if I say,I will go the unusual way and choose to do Master Data Deltas exactly like we do with Transaction Data deltas(first initialisation with data transfer then delta updates now and then)....how do we choose if its time stamp or numeric pointer incase of Master Data fields....
suppose,I want to set characteristic 'Location' as delta-field,what do I choose out of numeric pointer,calendar day and time stamp?and why should I choose it?
how about incase of Characteristic 'Customer Phone number'?
Thanks fr ur time
S

Hi ,
In generic delta you can choose only one field as delta option ie whatever changes happens for a record thar field shold get updated only then you will get delta for those records.
Choosing numeric pointer for text fields like location wont help for you. May be phone number you can try as numeric pointer if it is purely a number series which uses new numbers always.
If you are choosing these fields whenever there in chamge in this fields you will get delta. No other change in the same record will be captured
Thanks,
Arun

Generic delta for master data

Hi All,
I am trying to create a generic delta for master data "equipment" . table in SASP is "EQUI". I am choosing ALE delta . in that I have to provide table name and "changed doc object' . when I give "equi" as table name and "aedat" (changed on ) as "changed doc object' -
it is throwing error.
also when I tried for time satmp /calday delta , the delta doesnot work when changeed are done. don't know why?
Any idea what has to be given in these fields.
Regards,
Dola
Edited by: Dola das on Mar 17, 2010 12:55 PM

Hello,
TCDOB is a table where you need to maintain entries for Generic Detla.
Please goto SE16 : enter table name TCDOB
In the selection Screen Enter Object as EQUI and check the Number Of Entries..
I guess you need to maintain the number of fields on which the change is dependent for Detla ()
I treid creating the same Datasource Using Ale Detla
It worked and saved without errors :
i have the following entries in TCDOB table
OBJECT          TABNAME
EQUI            EQKT
EQUI            EQUI
EQUI            EQUZ
EQUI            FLEET
EQUI            ILOA
Please tell me your count and entries..
so that we can discuss this Further
Also if you find if there are no entries then you can Go to SCDO tcode and maintain entries with respect to change object.
waiting for your feedback
Regards
Nitin Bhatia
Edited by: Nitin Bhatia on Mar 18, 2010 6:44 AM

Generic Data Source - Generic Delta

Hi All,
is it possible to create a Generic data source delta with two values.
I mean suppose I need to extract data sat based on ERDAT.
Now In the Generic Delta I have the date to make it delta but my requirement is like making this date dependent on two dates One ERDAT and second is like always Sy-datum.
So Delta should work on ERDAT and SY-DATUM simultaneously.
Is there any way to do it.
Any help is highly appreciated.
Thanks,
Anjna

Hi Anjana,
In one datasource you can only specify one field for generic delta,
As an alternate solution:
1. Develop Generic Extractor based on FM
OR
2. Create 2 datasource one for new records and second for changed records and consolidate data in BW
Please refer the below links...It may be of help for you..
http://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/a0f46157-e1c4-2910-27aa-e3f4a9c8df33
/people/siegfried.szameitat/blog/2005/09/29/generic-extraction-via-function-module
Hope it helps,
Rgds,
Amit Kr.

Generic Delta without date field and without document number

Hi Experts,
I have created Funtion Module Extractor program, but my strcture not having any date field and document number fields.
Please let me know how to maintain the delta for extractor program.
Thanks in Advance.
Chandra

hi,
it is not mandatory to have doc number or date fields for delta,
u must have other fields which could change and try to find those fields and try, chk with the business for their delta requirement else go with full load.
Ramesh

In Generic Delta By selecting 0CALDAY?

hello all
In generic delta,if v select 0calday as a delta type,after selecting this delta type v need to select a field for this delta type,should v need to select Time field only(like Creation date,Last date of creation or something like) or other than Time field like select Matnr,Ername or something like this?
Pl let me know that?
regards
balji

My pleasure!!
The following document should be very helpful for you.. i lik this paper very much..
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/84bf4d68-0601-0010-13b5-b062adbb3e33
hope it helps..
regards,
Hari

Generic delta with function module

Hi Gurus,
Is it possible to create a generic DataSource with delta support using function module following the queue delta mechanism (u can get some function moduel in MCEX function group, and check the outbound delta queue before and after update in transaction smq1.
I can store the delta data using qRFC and collective update mechanism. but I don't know how to create a generic data with delta and how to attach a rfc destination (& logical system) to the data source. The Source system information is stored in the table "ROOSGEN". Is there any configuration setting required to do the same.
Regards,
Jugal

Jugal,
What I understand you to be asking is if it is possible to create a generic delta extractor which uses the delta queue. If this indeed is your question the answer is yes.
First you need to create your data source so it is visible via tx RSA5 and need to make sure that the delta type (ie ABR, AIM)is set appropriately for the datasource.
The issue however is determining from where you will associate your delta hook (when will you write to the queue)? I have in the past utilized BTE's, Business Transaction Events to write information out to the delta queue, you can see a list of available BTE's in your system via tx FINF.
Once you find a place to write your deltas from you call the below FM with the appropriate datasource.
RSC1_TRFC_QUEUE_WRITE.
Once you have done this the standard BW extractor for deltas will pull the information from the delta queue. But from what I understand you just want to know how to associate the data with the delta and that is the FM listed above.
Hope this helps,
Cheers,
Scott
> Hi Gurus,
>
> Is it possible to create a generic DataSource with
> delta support using function module following the
> queue delta mechanism (u can get some function moduel
> in MCEX function group, and check the outbound delta
> queue before and after update in transaction smq1.
> I can store the delta data using qRFC and collective
> update mechanism. but I don't know how to create a
> generic data with delta and how to attach a rfc
> destination (& logical system) to the data source.
> The Source system information is stored in the table
> "ROOSGEN". Is there any configuration setting
> required to do the same.
>
> Regards,
> Jugal

Problem in getting Generic Delta records to BW

Hi BW Gurus,
I have got one issues with which I have been struggling a lot for several days . i.e
I am extracting data from R/3 using Generic Extractor (View) from CATSCO and CATSDB. At the time of delta, I tried using Personal No with Time Stamp giving Upper limit as 1800 seconds. I executed Infopackage in BW immediately. But it didn't work out. So plz guide me how I can get Delta Records to BW. Or should I do any necessary factors apart from these in Generic Delta Screen (RSO2).
It is very urgent.
I will be thankful for solving this issue.

Hey I am "Intros" again,,
I am sorry man for giving the wrong T-code mistakenly in my last reply..
To solve the proble...the whole process is same what I told u before..
But... you got to go to T-Code : BD87 , then execute the IDocs manually to bring them in to BW
identify your IDocs which are missing in Monitor screen, then goto BD87 and select those IDocs and click execute... )you can search the IDoc's based on selection conditions)
I hope this will help u...
cheers man..
---Intros

How to deal with delete record in generic delta of generic datasource

Hi,
Anyone can give me suggestion about the delete record in generic delta of generic data. I need extract data with a generic datasource and hope deleted record in datasource also can be "delete" in next delta extraction. I do a test with generic delta. It seem that the delete record can not be updated in ODS. but updated record can be updated in next delta extraction.
How dose BW generic delta deal with the deleted record with generic delta mechanisim? Or how can I use generic delta mechanisim to realize that BW "delete" the deleted record of source system in ODS with delta extraction?
Thanks in advance!
Billy

Delete is not supported in delta mechanism of generic delta extractor. You will need to add a workaround for that.
- Capture the deleted records somewhere (maybe enhance the txn deleting the record so the key is written to a Z table). Take these records to BW and manipulate the recordmode to affect deletion of corresponding record from ODS.
- If your generic delta is based on FM, and if the 'delete' is captured in change document tables, add the logic to check change document tables whether any records are deleted, and if yes, send those to BW with appropriate recordmode to achieve deletion.

Generic delta with time stamp

Is it possible to work with generic delta with timestamp without time chracterstics , and calday with out date feilds.
PLZ can any one provide reply to my thread.
Edited by: aumdeepa on Aug 5, 2011 11:47 AM

If it failed in BW (request is red) and you do a delta - system will ask to mark it a 'repeat' because the last one failed. When you choose 'repeat', it is going to let the extractor know that it is a repeat delta.
In this case, it will extract data from 25th to current date (both last and current delta).
Repeat delta will work the same, just that the lower and upper limits will be applied to the selection of the delta field.
Lower limit -> adjust back the lower selection value by this value
upper limit ->Adjust back the upper selection value by this much.
upper limit 1, lower limit 1 (by the way lower limit isn't usually applicable in real situations)
Ran delta on 20th first time
Select all data upto 19th (adjusted due to upper limit)
Ran again on 23rd
Select from 19th (ie 20 - 1 due to lower limit 1) upto 22nd (ie 23 - 1 due to upper limit)
Ran on 27th
Select from 21st (22 - 1 due to lower limit 1) upto 26th (27 - 1 due to upper limit) and so on.
Repeat delta will follow this logic but will also bring the selection that was executed in the last delta run.
Hope it clears.

Problem with functioning Generic Delta

Hi Expert !
I Have Created a Generic Delta and has Scheduled the Delta Load By Means of Process Chain In BI Side.
Although it is showing Green(OK) status for the respected Request at PSA(saying No Data Exists FOR PSA) and ODS Lavel but no data is loaded at ODS.
although the data for the same crieria is available in R/3 side.
please share your idea what is reason behind........
Regards
Prakash

Hii I have created Generic Delta On Function Module, also i had checked in RSA3 and it is showing data. Also I have checked the Function Module and the field on which i had created Delta, the Delta Parameters is coming.
I am not able to find what actually the problem is........
Please share your idea if you have any.
Regards
Prakash

Incorrect TimeStamp in Generic Delta (UTC Issue)

Hi,
I have a problem regarding a generic delta extractor. The pointer stored in rsa7 (ROOSGENDLM table) is not UTC but system time. As standard tables store the timestamp using UTC format the delta extractor is not picking up the correct data.
Do you know a solution for this?

Hi,
Thanks for your reply. However I think that unfortunately this solution is not enough
For example:
I execute a delta. My TimeStamp is registered as UTC +2: 20080612160000. (Here I have the error, it should be in UTC)
Now I modify a record in R3 and it is registered with timestamp UTC: 20080612140000.
If I execute a delta it will take all the records higher than 20080612160000. Therefore my modification will never be uploaded.

Generic delta

Hi experts
i have problem in loading generic delta , Generic delta have three parameters
1.Time Stamp
2.Numeric pointer
3.Calender day
and also upperlimit and lower limit
can any one explain me about this parameters and how it works in generic delta
Thanks in in advance

hi,
Yes we have these 3 delta types.
timestamp is used when the requiement of data load is depends on time ie hourly based.
0calday is is used when the requiement of data load is depends on date ie daily based.
Numeric pointer is uesed if u want to load delta based on some fields like sales order,material order.
Lower limit and upper limit used for not to miss the records.
regards,
kundan

Regarding generic delta.

does any sap bw gurus know the answer to my doubt.
i have created 3 views from mm tables (EBAN,MSEG,MKPF,GLPCA) AND FROM THESE 3 views i have created 3 generic data sorses in r/3 dev server and transported to r/3 quality server and loaded from r/3 qlty server to ods with full update mode in infopackage.
now i want to load delta records for those geeric data sorses, what is the procedure. i have not selected the delta option while creation of data sorses but loaded into ODS with full update.now i want to get delta records, what is the process?
Suppose i have selected generic delta and given some field to get delta records in r/3 dev server, does it effect in r/3 qualty server or do i need to transport same recquest or new recquest for delta from dev to quality server?
this is very very urgent pls. points assigned.

Hi,
ODS may not let you load deltas if there are Full loads already loaded. So either you have to delete them or make them into Full repair using FM RSSM_SET_REPAIR_FULL_FLAG.
This you can decide after talking to users, if they are ok with the data unavailability during the reload, you can delete these data.
Then perform the changes (delta DS) in the DEV and transport it to QUAL.
Then the usual procedure, replicate in BW, perform init load and start deltas.
Hope this helps.
Thanks,
JituK

Doubt Reg Generic Delta "Safety Interval" Setting

Hi Experts,
I have a doubt regarding Setting "Safety Interval Upper Limit" and Lower limit in RSO2 for generic delta.
What does this setting imply?
If I do setting for calender day say both 1 then wht will be difference between delta before setting amd after setting?
Plz explain in terms other tham help provided...
Points will be awarded to say thanks..
Thanks in advance,
Sorabh

Hi Sorabh,
Here some SAP informations:
Safety Interval Upper Limit of Delta Selection
This field is used by DataSources that determine their delta generically using a repetitively-increasing field in the extract structure. The field contains the discrepancy between the current maximum when the delta or delta init extraction took place and the data that has actually been read. Leaving the value blank increases the risk that the system could not extract records arising during extraction. Example: A time stamp is used to determine the delta. The time stamp that was last read is 12:00:00. The next delta extraction begins at 12:30:00. In this case, the selection interval is 12:00:00 to 12:30:00. At the end of extraction, the pointer is set to 12:30:00. A record - for example, a document- is created at 12:25 but not saved until 12:35. It is not contained in the extracted data but, because of its time stamp, is not extracted the next time either.
For this reason, the safety margin between read and transferred data must always be larger than the maximum length of time that it takes to create a record for this DataSource (with a time stamp delta), or it must display an interval that is sufficiently large (for determining delta using a serial number).
Safety Interval Lower Limit
This field contains the value taken from the highest value of the previous delta extraction to determine the lowest value of the time stamp for the next delta extraction. For example: A time stamp is used to determine a delta. The extracted data is master data: The system only transfers after-images that overwrite the status in the BW. Therefore, a record can be extracted into the BW for such data without any problems.
Taking this into account, the current time stamp can always be used as the upper limit when extracting: The lower limit of the next extraction is not seamlessly joined to the upper limit of the last extraction. Instead, its value is the same as this upper limit minus a safety margin. This safety margin needs to be big enough to contain all values in the extraction which already had a time stamp when the last extraction was carried out but which were not read. Not surprisingly, records can be transferred twice. However, for the reasons above, this is unavoidable.
Extracted Data Delta Type
The system uses the delta type to determine how extracted data is to be interpreted in BW, and into which data targets it can be posted.
A distinction is made between the following:
1. Additive delta
The key figures for extracted data are added up in BW. DataSources with this delta type can supply data to ODS objects and InfoCubes.
2. New status for changed records
Each record to be loaded delivers the new status for the key figures and characteristics. DataSources with this delta type can write to ODS objects or master data tables.
Check also examples in "How to... Create Generic Delta" under www.service.sap.com/bi.
Ciao.
Riccardo.

Generic Data vs Generic Delta

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