QUERY PLAN
GroupAggregate (cost=393.02..393.04 rows=1 width=12)
Group Key: case_id
-> Sort (cost=393.02..393.02 rows=1 width=4)
Sort Key: case_id
-> Seq Scan on tbl_implement_records (cost=0.00..393.01 rows=1 width=4)
Filter: ((created_by = 1000) AND (case_id = ANY ('{9255,9256,9259,9263}'::integer[])))