QUERY PLAN
GroupAggregate (cost=482.52..483.48 rows=54 width=12)
Group Key: project_id
-> Sort (cost=482.52..482.66 rows=55 width=8)
Sort Key: project_id
-> Seq Scan on tbl_cases (cost=0.00..480.94 rows=55 width=8)
Filter: (project_id = ANY ('{4005,4147,3976,4146,4177,4097,4145,4135,4114,4081,3974,3959,4124,4123,4120,4116,4115,4112,4092,4102}'::integer[]))