QUERY PLAN
GroupAggregate (cost=370.17..370.35 rows=10 width=12)
Group Key: case_id
-> Sort (cost=370.17..370.20 rows=10 width=4)
Sort Key: case_id
-> Seq Scan on tbl_implement_records (cost=0.00..370.00 rows=10 width=4)
Filter: (case_id = ANY ('{8264,8267,8266,8265,5051,8263,8262,8260,8246,8256}'::integer[]))