QUERY PLAN
GroupAggregate (cost=100.54..100.56 rows=1 width=12)
Group Key: case_id
-> Sort (cost=100.54..100.54 rows=1 width=4)
Sort Key: case_id
-> Seq Scan on tbl_pre_sales (cost=0.00..100.53 rows=1 width=4)
Filter: ((created_by = 5064) AND (case_id = ANY ('{9262,9261,9260,9258}'::integer[])))