QUERY PLAN
GroupAggregate (cost=320.79..321.19 rows=23 width=12)
Group Key: project_id
-> Sort (cost=320.79..320.85 rows=23 width=8)
Sort Key: project_id
-> Seq Scan on tbl_cases (cost=0.00..320.27 rows=23 width=8)
Filter: (project_id = ANY ('{3819,3805,3814,3822,3817,3811,3821,3818,3816}'::integer[]))