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 ('{4002,4037,3992,3580,4095,4049,4041,4001,3994,3983,3954,4065,4062,3944,3867,3864,3818,3461,3921,3848}'::integer[]))