anchor.diff:      open Fss.Pool // used for database handle pooling
       open Npgsql
   
  -    // http://tomasp.net/blog/dynamic-sql.aspx
       /// SqlDataReader wrapper that provides access to columns 
       /// of the result-set using dynamic access operator
  +    /// See http://tomasp.net/blog/dynamic-sql.aspx for original idea.
       type DynamicSqlDataReader(reader:NpgsqlDataReader) =
         member x.Reader = reader
         member x.Close() = reader.Close()
  
positive.code:             } 
  
            member x.ExecuteScalar(sql:string) =
              use comm = x.Command sql
              comm.ExecuteScalar()
  
  
negative.code:         let p = NpgsqlParameter("@" + name, box value)
          cmd.Command.Parameters.Add(p) |> ignore
        // Execute command and wrap returned SqlDataReader
        member x.ExecuteReader() =  new DynamicSqlDataReader(cmd.ExecuteReader())
  
        member x.ExecuteNonQuery() = cmd.ExecuteNonQuery()
        member x.ExecuteScalar() = cmd.ExecuteScalar()
  