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 ('{3854,3796,4024,3957,4146,4005,4149,4136,4133,4165,4163,4147,4134,4131,4125,4109,4088,4083,3976,3778}'::integer[]))