QUERY PLAN
GroupAggregate (cost=339.12..339.14 rows=1 width=12)
Group Key: case_id
-> Sort (cost=339.12..339.13 rows=1 width=4)
Sort Key: case_id
-> Seq Scan on tbl_implement_records (cost=0.00..339.12 rows=1 width=4)
Filter: ((created_by = 1000) AND (case_id = ANY ('{8267,8266,8265,8260}'::integer[])))