Extract COBOL file data using CFF

LNarayana · Post by **LNarayana** » Fri Mar 24, 2006 4:44 pm

Can any one give suggestion how to extract data from EBCDIC file with multiple redefines columns. Does Datastage CFF support this type of structure?

Thanks
Narayana

ray.wurlod · Post by **ray.wurlod** » Fri Mar 24, 2006 5:11 pm

Pre-process the file by reading it as a single column (or maybe two, if the record type is in the first position), using a Transformer stage to split the stream according to record type.
There are various techniques for preprocessing EBCDIC to ASCII.

shawn_ramsey · Post by **shawn_ramsey** » Fri Mar 24, 2006 5:41 pm

LNarayana wrote:Can any one give suggestion how to extract data from EBCDIC file with multiple redefines columns. Does Datastage CFF support this type of structure?

Thanks
Narayana

This is exactly what the CFF does. It is best if you have a COBOL copybook to import the file definitions from. The stage is a little odd to work with but it runs much faster than using using a sequential stage and performing the conversion in a transform.

LNarayana · Post by **LNarayana** » Fri Mar 24, 2006 6:08 pm

Thanks for your quick response.
We have cfd file which has COBOL definition. and used to import table definition and used that definition in CFF stage in source columns tab.
I checked the column definitions by "Edit Row" and found that 5 columns are redefined.
I selected all the columns except groups in to the select columns.
then I tried to view the data. data is ok upto the column which is prior to redefined column. and after that column we have some tabs or data is disturbed. Is it due to redefined columns or due to column lengths.
Can anyone give clear idea how to approach to extract the complete file.

Once again thanks
Narayana

kumar_s · Post by **kumar_s** » Sat Mar 25, 2006 4:12 am

Is the layout includes the redifines?
How you imported the COBOL layout? Did you specified 'As Is' option while importing the layout. If it was imported correctly, then you can try to comment the feilds under the redefine and just allow the prime column to be meta data and check.
Also try to write into a Seq file and check.

chulett · Post by **chulett** » Sat Mar 25, 2006 7:48 am

From what I've read here, comments seem to confuse it... best to remove them, especially around an area of redefines.

thurmy34 · Post by **thurmy34** » Fri Mar 31, 2006 8:39 am

Hi,
Like Chulett said the comments realy confuse the CFF stage.
It's better to delete then.
I had some troubles with redefine in occurs too.
The redefines column was set to the first occurs.

crouse · Post by **crouse** » Fri Mar 31, 2006 9:19 am

The CFF stage will do everything you need, without commenting out anything.

The reason there are REDEFINES is because there are multiple record types/layouts in your data.

(if you're thinking of commenting out lines of the cfd, you better off just deleting them, but I don't believe you'll want/need to do either one)

You comment about viewing data and it looking right up to a point is "normal". You probably included all the columns from all the REDEFINES in ONE output link. Only data for a particular layout (REDEFINEd section) looks correct.

You'll probably want to create several output links from the one CFF stage that reads the file. On each output link you'll select ONLY the columns that relate to that link (probably some fixed data at the front of the layout, and the respective REDEFINE that defines a particular record type).

On each row, in the fixed data portion that is usuually in the first part of the record layout, will be a column that says what kind of record it is (i.e. HDR, TLR, DETAIL, etc...)

On the output links, you'll specify the column to interrogate that will indicate what rows will go out that output link.

Without writing a book, do understand what I'm getting at?

-Craig

DSXchange

Extract COBOL file data using CFF

Extract COBOL file data using CFF

Re: Extract COBOL file data using CFF