QUERY PLAN
GroupAggregate (cost=374.81..375.29 rows=27 width=12)
Group Key: project_id
-> Sort (cost=374.81..374.88 rows=27 width=8)
Sort Key: project_id
-> Seq Scan on tbl_cases (cost=0.00..374.17 rows=27 width=8)
Filter: (project_id = ANY ('{2939,4158,4150,4152,4171,4173,4181,4183,4175,4179}'::integer[]))