QUERY PLAN
GroupAggregate (cost=96.46..96.48 rows=1 width=12)
Group Key: case_id
-> Sort (cost=96.46..96.47 rows=1 width=4)
Sort Key: case_id
-> Seq Scan on tbl_pre_sales (cost=0.00..96.45 rows=1 width=4)
Filter: ((case_id = ANY ('{9259,9253}'::integer[])) AND (created_by = 1000))