Default value in DFF in transaction header

It is required to set a default value when transactions are made when they are invoice and debit memo types.

For this, list of values are being used and it is required to place a default value when creating INV and DM type documents.

When creating CM type documents you should leave that field null. It is worth clarifying that the field is required by business necessity as mandatory.

I see that there is a default type SQL function, has anyone worked with this function?

Thanks