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 ('{3503,3467,3458,3424,3441,3372,3371,3269,3318,3216,3300,3281,3251,3265,3276,3274,3263,3235,3246,3225}'::integer[]))