Addapt default encoding in SQL Server

Author: kitsuyui

app/models/data_source_table.rb

@@ -16,7 +16,9 @@ def initialize(data_source, schema_name, table_name)
   def fetch_rows(limit=20)
     data_source.access_logging do
       adapter = connection.pool.connections.first
-      column_names = columns.map {|column| adapter.quote_column_name(column.name) }.join(", ")
+      decode_with = data_source.encoding or 'UTF-8'
+      encode_to = Encoding.default_internal or 'UTF-8'
+      column_names = columns.map {|column| adapter.quote_column_name(column.name.encode(encode_to, decode_with)) }.join(", ")
       if data_source[:adapter] == 'sqlserver'
         rows = connection.select_rows(<<-SQL, "#{table_name.classify} Load")
           SELECT TOP #{limit} #{column_names} FROM #{adapter.quote_table_name(full_table_name)};

app/models/table_memo_raw_dataset_column.rb

@@ -9,7 +9,8 @@ def format_value(value)
       when 'timestamp'
         '0x' + value.unpack('H*')[0]
       else
-        value.to_s.encode(Encoding.default_internal, datasource_encoding).gsub(/\u0000/, '')
+        dst_enc = Encoding.default_internal or 'UTF-8'
+        value.to_s.encode(dst_enc, datasource_encoding).gsub(/\u0000/, '')
       end
     else
       case sql_type