datasource

select * from flows
where title ='Заключение контрактов по плану-графику 2021';

with sd as
(select
    id as sid,
    datasource_id
 from steps
Where 1=1
and step_type = 6
and datasource_id is not null
),
ssd as
(
Select
    unnest(s.step_ids) sid,
    flow_id

From steps s
Where  1=1
and step_type = 6
)


Select
ssd.*,
sd.datasource_id
From ssd
join sd on ssd.sid=sd.sid
Where flow_id=247