stored procedure signature with entity as param

Author: (dammie)

I am trying to get data via stored proc signature as resultset in OUT entity param.
    create proc up_get_data
    select 111122, "text", 354655, 4, 5, 6, .... , 20 
I ve found out, that there is number of fields limit is there posibility that I can get into entity...

How to avoid restriction for entity numer of fields ( Your DBMS limit applies )
Or can I split select in two and get two entities simluatenously as parametr via one signature?
Thanks for hint

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