QUERY PLAN
GroupAggregate (cost=425.38..426.25 rows=49 width=12)
Group Key: project_id
-> Sort (cost=425.38..425.51 rows=50 width=8)
Sort Key: project_id
-> Seq Scan on tbl_cases (cost=0.00..423.97 rows=50 width=8)
Filter: (project_id = ANY ('{3809,3461,3796,3801,3800,3793,3794,3792,3788,3786,3782,3785,3783,3780,3684,3547,3755,3694,3720,3743}'::integer[]))