QUERY PLAN
GroupAggregate (cost=481.58..482.53 rows=54 width=12)
Group Key: project_id
-> Sort (cost=481.58..481.72 rows=55 width=8)
Sort Key: project_id
-> Seq Scan on tbl_cases (cost=0.00..479.99 rows=55 width=8)
Filter: (project_id = ANY ('{3857,3855,3816,3813,3786,3767,3764,3760,3752,3751,3744,3723,3714,3703,3686,3679,3661,3660,3653,3652}'::integer[]))