embedded R function not working

Hello,

I have the following query:

CREATE TABLE mytable AS ( SELECT <fields….> FROM table1 AS a, my_R_function(a.field1, ...) AS asd WHERE <some conditions>

) WITH DATA;

MonetDB says: SELECT: no such column ‘a.field1’

The issue is in how I call the R function, since when I remove it everything’s just fine. My aim is to call the function for each row of table1. The new table will have a couple of fields from table1 and a bunch of other fields computed from the R function. How am I supposed to do that?

Thank you,

Stefano