QUERY PLAN
GroupAggregate (cost=90.84..90.86 rows=1 width=12)
Group Key: case_id
-> Sort (cost=90.84..90.84 rows=1 width=4)
Sort Key: case_id
-> Seq Scan on tbl_pre_sales (cost=0.00..90.83 rows=1 width=4)
Filter: ((case_id = ANY ('{8263,8262}'::integer[])) AND (created_by = 5016))