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 ('{4121,4061,4004,3820,3808,3804,3791,3789,3763,3724,3717,3710,3687,3680,3675,3630,3620,3575,3573,3560}'::integer[]))