Hey Stefano,
You should pass the arguments to the R function directly using a sub-query. You can do that by using double brackets, e.g.
CREATE TABLE mytable AS ( SELECT <fields….> FROM table1 AS a, my_R_function( (SELECT a.field1,... FROM table1) ) AS asd WHERE <some conditions>
) WITH DATA;
However, this will likely do a cross product between table1 and the result of your R function, and I doubt that is your intention here. You should use an explicit join instead of an implicit join, e.g.
SELECT <fields..> FROM table1 AS a INNER JOIN my_R_function((SELECT field1,... FROM table1)) AS b ON <join condition>
Regards,
Mark
----- Original Message ----- From: "Stefano Fioravanzo" fioravanzos@gmail.com To: "users-list" users-list@monetdb.org Sent: Monday, May 30, 2016 4:37:10 PM Subject: 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
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