nixpkgs/pkgs/tools/misc/pg_top/default.nix

{ stdenv, fetchurl, ncurses, postgresql }:

stdenv.mkDerivation rec {
  name = "pg_top-3.7.0";

  src = fetchurl {
    url = "http://pgfoundry.org/frs/download.php/1781/${name}.tar.gz";
    sha256 = "17xrv0l58rv3an06gkajzw0gg6v810xx6vl137an1iykmhvfh7h2";
  };

  buildInputs = [ ncurses postgresql ];

  meta = with stdenv.lib; {
    description = "A 'top' like tool for PostgreSQL";
    longDescription = '' 
      pg_top allows you to: 
       * View currently running SQL statement of a process.
       * View query plan of a currently running SQL statement.
       * View locks held by a process.
       * View user table statistics.
       * View user index statistics.
    '';

    homepage = http://ptop.projects.postgresql.org/;
    platforms = platforms.linux;
    license = licenses.free; # see commands.c
  };
}