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 ('{4138,4132,4129,4126,4122,4099,4030,4029,3972,3837,4161,4164,4151,4157,4155,4145,4140,4135,4117,4114}'::integer[]))