QUERY PLAN
GroupAggregate (cost=339.19..339.30 rows=6 width=12)
Group Key: case_id
-> Sort (cost=339.19..339.21 rows=6 width=4)
Sort Key: case_id
-> Seq Scan on tbl_implement_records (cost=0.00..339.12 rows=6 width=4)
Filter: (case_id = ANY ('{8250,8258,8255,8253,8245,8248}'::integer[]))