added flag comment fixes #1192

app/models/table.rb

@@ -132,6 +132,8 @@ class Table < Sequel::Model(:user_tables)
                 :importing_encoding,
                 :temporal_the_geom_type,
                 :migrate_existing_table,
+                # this flag is used to register table changes only without doing operations on in the database
+                # for example when the table is renamed or created. For remove see keep_user_database_table
                 :register_table_only,
                 :new_table,
                 # Handy for rakes and custom ghost table registers, won't delete user table in case of error