Internally we have a command "Import Data" which allows a user to associate a directory of files with a given Iceberg table. This is generally used when someone wants to add a number of files directly to an Iceberg table without rewriting all the data, they just want the existing files (usually from a a Hive table or another format) to just be added to the existing table.

I was thinking of adding a similar procedure to Iceberg if that would be of value to other users?

This is also in the vain of exposing more Iceberg internal functionality like "addFile" directly to Spark SQL ...

cc @aokolnychyi