How to use fillnull for certain fields (and not for other ones)

[rrovers]

My search ends with:

| table Afdeling 20* Voorlaatste* Laatste* verschil

It has several detail rows and 1 row with totals. I want to use fillnull for the totals for the 20* columns (2023-10, 2023-11 etc.) but not for Voorlaatste* Laatste* and verschil. 

I can't use 

| fillnull 20* value="0.0"

because that adds a column "20*" and I don't want to use fillnull 2023-10 etc.

Is there a way to do this?

[richgalloway · Accepted solution]

The fillnull command does not support wildcards.  Try using foreach as a wrapper around fillnull.

| foreach 20* [fillnull '<<FIELD>>' value="0.0"]