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 ('{4146,4005,4147,3976,4097,4145,4135,4114,4081,3974,3959,4124,4123,4120,4116,4115,4112,4092,4102,4093}'::integer[]))