Function intern_find_sys_var

sql/set_var.cc:490–506

*/

sys_var *intern_find_sys_var(const char *str, uint length)
{
  sys_var *var;

  /*
    This function is only called from the sql_plugin.cc.
    A lock on LOCK_system_variable_hash should be held
  */
  var= (sys_var*) my_hash_search(&system_variable_hash,
                              (uchar*) str, length ? length : strlen(str));

  /* Don't show non-visible variables. */
  if (var && var->not_visible())
    return NULL;

  return var;
}

/**
  Update variable