Merge abarkov@bk-internal.mysql.com:/home/bk/mysql-5.0

com_use(String *buffer __attribute__((unused)), char *line)

{

  char *tmp, buff[FN_REFLEN + 1];

  int select_db;

  bzero(buff, sizeof(buff));

  strmov(buff, line);

  if (!current_db || cmp_database(charset_info, current_db,tmp))

  {

    if (one_database)

    {

      skip_updates= 1;

      select_db= 0;    // don't do mysql_select_db()

    }

    else

      select_db= 2;    // do mysql_select_db() and build_completion_hash()

  }

  else

  {

    /*

      USE to the current db specified.

      We do need to send mysql_select_db() to make server

      update database level privileges, which might

      change since last USE (see bug#10979).

      For performance purposes, we'll skip rebuilding of completion hash.

    */

    skip_updates= 0;

    select_db= 1;      // do only mysql_select_db(), without completion

  }

  if (select_db)

  {

    /*

      reconnect once if connection is down or if connection was found to

    my_free(current_db,MYF(MY_ALLOW_ZERO_PTR));

    current_db=my_strdup(tmp,MYF(MY_WME));

#ifdef HAVE_READLINE

    if (select_db > 1)

      build_completion_hash(rehash, 1);

#endif

  }

  }

  else

    skip_updates= 0;

  put_info("Database changed",INFO_INFO);

  return 0;

}