With v 3.9.1 this useful feature seems no longer to be there.
This former feature was very practical for 2 reasons:
(1) Source files without header row could easily be matched to their respective columns.
(So far I never had to swap any columns.)
(2) I have a generic temporary table I load with various data to be processed.
In the past I only had to make sure the order was correct and therefore the column header of each respective file to import could have meaningful specific descriptions for later reference, without the need having many different temporary tables.
Could you please add this feature back in?
Done in our GIT repository. Will be available in future snapshots and versions.
Sorry for the inconvenience.