QUERY PLAN
GroupAggregate (cost=362.43..362.58 rows=9 width=12)
Group Key: case_id
-> Sort (cost=362.43..362.45 rows=9 width=4)
Sort Key: case_id
-> Seq Scan on tbl_implement_records (cost=0.00..362.28 rows=9 width=4)
Filter: (case_id = ANY ('{8252,8259,8250,8258,8255,8253,8251,8245,8248}'::integer[]))