do_copy (sample/psql.rb)

    # File sample/psql.rb, line 478
    def do_copy(settings, table, from_p, file)
      if (table == nil || from_p == nil || file == nil)
        printf("Syntax error, reffer \\copy help with  \\? \n")
        return
      end

      if from_p.upcase! == "FROM"
        from = TRUE
      else
        from = FALSE
      end

      query  = "COPY "
      query += table

      if from
        query += " FROM stdin"
        copystream = File.new(file, "r")
      else
        query += " TO stdout"
        copystream = File.new(file, "w")
      end

      begin
        success = SendQuery(settings, query, from, !from, copystream);
        copystream.close
        if !settings.quiet
          if success
            printf("Successfully copied.\n");
          else
            printf("Copy failed.\n");
          end
        end
      rescue
        printf(STDERR, "Unable to open file %s which to copy.",
               if from then "from" else "to" end)
      end
    end