QUERY PLAN
GroupAggregate (cost=352.32..352.79 rows=27 width=12)
Group Key: project_id
-> Sort (cost=352.32..352.38 rows=27 width=8)
Sort Key: project_id
-> Seq Scan on tbl_cases (cost=0.00..351.67 rows=27 width=8)
Filter: (project_id = ANY ('{3387,3743,3841,3823,3784,3665,3626,3789,3866,3556}'::integer[]))