Time interval limit for generic delta on timestamp

I have searched a lot about delta on timestamp in the forums.
But I'm still not clear with the safety upper and lower limits..how is my delta load affected by this value?
What happens if I dont specify any value for the interval limit?

Hi,
This is very simple thing, you must be knowing the concept of data posting in transactional system, e.g. creating a sales order.
When you create an order and press save, system takes data from this screen to the database tables and once this action, which is called "DB COMMIT", gets completed, you get data in your system tables. So this activity may take some time before you can retrive this information.
Let's say it takes 5 mins, so when you'll collect delta records, if some records, which are under process for DB commit, they won't come in delta. Say u collect these records at 12:00 AM and record posted 11:55 PM will take 5 mins to reflect in Database. So we keep safty limit of 5 min.
Upper and lower means starting and ending of time window, from which you want to extract records.
Hope it helps in understanding...
Regards,
Ashish

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Regd Safety Interval Lower Limit for Generic Delta

Hi All,
Safety Interval Upper Limit =1 for a Generic Delta would get Delta based on yesterday's BW data.
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Your inputs please
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Hi,
just a short example:
you run a init today --> 20070525 (internal date format).
for the next delta tomorrow the system takes the last extraction date - 1 day so 20070524 for data selection and will store 20070526 as last extraction date and so on.
This is to make sure that you will get all additional records extracted which were changed or created on each extraction date, but after last extraction. OK, you will get some records twice, but therefore you normally post the data to a ods via overwrite mode and this will take care about the 'real' delta while doing the further posting to the cube.
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kind regards
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Safety Intervals for Generic Delta

Hello Gurus,
I want to know about safety upper limit and lower limit for generic delta.
I have gone through the previous threads related to this topic and i am not able to understand completely.
can anybody explains me this in detail with example in terms with Calday, Timestamp & Numeric pointer.
Thanks in advance.

There is very good example was exist on wiki.
please search and help yourself.
Use Google search by using search term " wiki generic delta".
You will get what you need.

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Hi,
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Hi Gurus,
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Hi,
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Query for generic delta

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Hi All,
i have created a generic datasource using tables vbrp,vbrk.mara,marc,knvv.. to get the sales data for planning.Here i have document created date and time.So i'm concatinating these 2 date and time fields into timestamp which is of format yyyymmddhhmmss.Finally i'm using this timestamp to extract data .
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Hi Siva,
U mean.. is ur MKPF is having the TIme stamp field in that? or this table has got enhanced with the TIme stamp field..?
do let us know these details..
Why dont u try using any other fields like changed on or some other fields which will satisfy ur requirement..?
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Assign points if this helps

How to get generic delta using timestamp field

Hi All,
i have created a generic datasource using tables vbrp,vbrk.mara,marc,knvv.. to get the sales data for planning.Here i have document created date and time.So i'm concatinating these 2 date and time fields into timestamp which is of format yyyymmddhhmmss.Finally i'm using this timestamp to extract data .
So is it the right way to pull the data using timestamp and what is the timezone i need to specify as the servers are in india only.
or any other way to proceed.
Thanks
Rao.

Hi Rao,
Delta based on timestamp based on generic datasource only works if any one of the tables contains timestamp field(not time and date fields separately).
I dont think by combining date & time fields will give you correct results.
Regarding time zone: Use SAP system time zone.
Srini

How can I get delta records for Generic Delta

Hi BW Gurus,
I am using Generic Extractor using View from CATSDB and CATSCO talbes. At the time of modifying and changing records I am unable to get those records in BW despite enabling delta in RSO2 screen. I am able to view those modified and added records in R/3 in tables. Plz help me how I get those records to BW.

hi,
After we loaded all the historical data uing full upadate . Implemenattion process is over , But we will have the Transaction data that will raise daily , So we have to store that New / changed data in Delta q , And extract them each day by Delta Update
So we will create an Info packege with the update mode as Delta , And schedule them when to start extraction , So we create the process chain uisng RSPC by giving the Info packege name . And extract the Detla daily as per schedule .
award pts if helpful..

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Dear all,
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Hi
The sytstem will shows oldest open items depending on the payment terms from the invoice date.
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Damu

Generic Delta with numeric pointer (Without safety interval and no field)

Hi
We have problems with Generic Delta extraction. Our previous Dev has created the data source with numeric pointer as the data source without any safety interval and without any field for numeric pointer selection even we have the date field (creation and change dates in view)....
He created the generic delta with numeric pointer and Additive delta selection on top of view (EKKO,EKPO and EKKN). So we are missing lot of records. Now I need to fix this asap, I have done generic delta with timestamp and cal day with change/creation date.
Now in order to fix our delta loads should I use the cal day as the delta pointer with change or creation date already available or is it ok to use numeric pointer with additive delta and safety lower limit as 10 or 20 with upper limit blank?
Also Should I use any field in the field nm section or is it ok to leave it blank ? Please advice...
Note: I checked the missing delta records in ECC and the change timing is in the afternoon and our load time is only night...We also have several other data sources with same settings (numeric with no safety and no field) but it is not giving any issues.
Thanks
Edited by: ganesh uttitti on Jan 26, 2011 10:33 PM

Hi Ganesh ,
I'm a little confuse,Why are you not use LO Delata for it?

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.

Time interval limit for generic delta on timestamp

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