Sorting is disabled because table knows nothing about datatype of your column. To enable sorting for this column, I suggest creating a meta property for this value.
I’ve seen this response on the forum but unfortunately it doesn’t work in my case. I cannot add a meta property because I need a query to populate it and i am not allowed to use dataManager or call a service from the entity.
Is there an easy way to do it or I have to use some kind of a view model (not persisted entity) there to feed the datasource?