QUERY PLAN
GroupAggregate (cost=448.78..449.81 rows=58 width=12)
Group Key: project_id
-> Sort (cost=448.78..448.93 rows=60 width=8)
Sort Key: project_id
-> Seq Scan on tbl_cases (cost=0.00..447.01 rows=60 width=8)
Filter: (project_id = ANY ('{3256,3935,3599,3477,3483,3458,3433,3423,3402,3381,3250,3379,3315,3357,3320,3165,3300,3239,3276,3252}'::integer[]))