I need help reading the below code. I am not sure what specific parts in this code are doing. For example, what does ( firstobs = 2 keep = DPD_CLOSE_OF_BUSINESS_DT rename = (DPD_CLOSE_OF_BUSINESS_DT = Next_COB_DT) ) do?
Also, what does ( obs = 1 drop = _all_ ); do? I have also not used Prev_COB_DT = ifn( first.SOR_LEASE_NBR, (.), lag(DPD_CLOSE_OF_BUSINESS_DT) ); before, what does this do? I am reading someone elses code, I wish I could provide more detail. If I find a solution, I will post it. Thanks for your help.
Removed
A set statement like this:
set
LETNOTRG.REQ_1_3_03 (
firstobs = 2
keep = DPD_CLOSE_OF_BUSINESS_DT
rename = (DPD_CLOSE_OF_BUSINESS_DT = Next_COB_DT)
)
LETNOTRG.REQ_1_3_03 (
obs = 1
drop = _all_
)
;
performs a "look-ahead" into the dataset by starting to read at observation 2, and preventing a premature eof by reading 1 observation without data (that's what the drop=_all_ does).
What puzzles me is that it tries to read the same dataset that it is creating, so my guess is that this won't work.
It is doing the opposite of LAG(). It is creating a variable that will have the value of a variable from the NEXT observation.
But it is probably using the wrong dataset. It should be using the same dataset as in the first SET statement.
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