Read Infopackage selection from a table using ABAP

Hello Experts,
I have a flat file consisting of 3 columns which I want to use as selection fields for the Infopackage. Now, is it possible to load this flat file to an ODS or a master data table and then write some ABAP in the Infopackage to read the values of the columns and populate the selection fields.
This is what I want: The columns of the flat file are - Company Code, Doc number, Fiscal Year
Now, I loaded this file into a tables (around 2 million records) and then use ABAP to populate the entire file into the selection tab of the Infopackage.
What would be the best approach for this?
Thanks in advance
Vivek

Hi,
It's possible in theory. Just one thing, too many selections in an InfoPackage may not work (I remember about 1,000 or 10,000, not very sure).
I'd like suggest loading a range rather than so many selections. For example, say you have below documents:
1000
1001
1005
1010
Then just load from 1000 to 1010, and create a start routine in your update rule/transformation. There you can do this:
1. select records from the table where you store flat file, using the same selection (1000 to 1010)
2. For every records in DATA_PACKAGE, using READ TABLE statement to check whether that record exist in the table. If not exist then simply delete it from DATA_PACKAGE
I think that would have much better performance. Let us know if you have further questions.
Regards,
Frank

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