QUERY PLAN
GroupAggregate (cost=92.47..92.51 rows=2 width=12)
Group Key: case_id
-> Sort (cost=92.47..92.48 rows=2 width=4)
Sort Key: case_id
-> Seq Scan on tbl_pre_sales (cost=0.00..92.46 rows=2 width=4)
Filter: ((NOT is_draft) AND (case_id = ANY ('{9259,9253}'::integer[])))