create or replace function fsm.is_state_active(shid bigint, smid bigint, state text)
  returns bool as
$$
  begin

    perform true
    from fsm.state_machine_state 
    where state_machine_id = smid 
      and shard_id = shid
      and state_id = state;

    if not found then
      return false;
    else
      return true;
    end if;
  end;
$$ language plpgsql stable strict;