Method parse_var_list

sql/session_tracker.cc:148–216

Parse the specified system variables list. @Note In case of invalid entry a warning is raised per invalid entry. This is done in order to handle 'potentially' valid system variables from uninstalled plugins which might get installed in future. @param thd [IN] The thd handle. @param var_list [IN] System variable list. @param throw_error [IN] bool whe

    false                   Success
*/
bool Session_sysvars_tracker::vars_list::parse_var_list(THD *thd,
                                                        LEX_STRING var_list,
                                                        bool throw_error,
							CHARSET_INFO *char_set)
{
  const char separator= ',';
  char *token, *lasts= NULL;
  size_t rest= var_list.length;

  if (!var_list.str || var_list.length == 0)
    return false;

  if(!strcmp(var_list.str, "*"))
  {
    track_all= true;
    return false;
  }

  token= var_list.str;

  track_all= false;
  mysql_prlock_rdlock(&LOCK_system_variables_hash);
  for (;;)
  {
    sys_var *svar;
    LEX_CSTRING var;

    lasts= (char *) memchr(token, separator, rest);

    var.str= token;
    if (lasts)
    {
      var.length= (lasts - token);
      rest-= var.length + 1;
    }
    else
      var.length= rest;

    /* Remove leading/trailing whitespace. */
    trim_whitespace(char_set, &var);

    if(!strcmp(var.str, "*"))
    {
      track_all= true;
    }
    else if ((svar= find_sys_var(thd, var.str, var.length, throw_error,
                                 /*hash_already_locked=*/true)))
    {
      if (insert(svar) == TRUE)
        return true;
    }
    else if (throw_error && thd)
    {
      push_warning_printf(thd, Sql_condition::WARN_LEVEL_WARN,
                          ER_WRONG_VALUE_FOR_VAR,
                          "%.*s is not a valid system variable and will "
                          "be ignored.", (int)var.length, token);
    }