create or replace function fsm.create_machine(shard bigint, statechart bigint)
  returns fsm.state_machine as
  $$
      insert into fsm.state_machine (shard_id, statechart_id) values
        (shard, statechart)
      returning *;
  $$ language sql volatile strict;

comment on function fsm.create_machine(bigint, bigint) is $comment$
    creates a state machine without starting it
$comment$;