QUERY PLAN
GroupAggregate (cost=447.66..448.01 rows=20 width=12)
Group Key: case_id
-> Sort (cost=447.66..447.71 rows=20 width=4)
Sort Key: case_id
-> Seq Scan on tbl_implement_records (cost=0.00..447.23 rows=20 width=4)
Filter: (case_id = ANY ('{8280,8279,8277,8278,8276,8274,8272,8273,8271,8270,8267,8266,8265,8264,8262,8263,8256,8258,8255,8250}'::integer[]))