Source (Flatfile) - Target (1-1 mapping). How to load first or
last 20 record to target?
Answer Posted / joe
We cannot use a sorter because it will shuffle the data.
For the last 20 rows. In a seperate pipeline use aggregator
and do a Count(key) and Max(key) to get the total number of
rows.
use an output port o_count and o_max to populate this count
to an expression transformation before the Filter.
o_count_last_20 = o_count - 20
i.e. if there are 35 records we need records from 15 to 35
In the filter check nextval between o_count_last_20 and
o_Max
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