Forcing UTF-8 encoding and adding support for 'with' clause

lib/etl/control/destination/file_destination.rb

@@ -93,7 +93,7 @@ def flush
           end
 
           # write the values joined by the separator defined in the configuration
-          f.write(values.join(separator))
+          f.write(values.join(separator).force_encoding("UTF-8"))
 
           # write the end-of-line
           f.write(eol)

lib/etl/control/source/database_source.rb

@@ -75,6 +75,11 @@ def order
         configuration[:order]
       end
 
+      # Get the with clause for the query, defaults to nil
+      def with
+        configuration[:with]
+      end
+
       # Return the column which is used for in the where clause to identify
       # new rows
       def new_records_only
@@ -169,7 +174,9 @@ def write_local(file)
       # Get the query to use
       def query
         return @query if @query
-        q = "SELECT #{select} FROM #{@table}"
+        q = ''
+        q << "#{with}" if with
+        q << "SELECT #{select} FROM #{@table}"
         q << " #{join}" if join
 
         conditions = []