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 ('{3623,3599,3591,3590,3589,3577,3576,3568,3552,3544,3515,3514,3513,3503,3467,3458,3424,3441,3372,3371}'::integer[]))