QUERY PLAN
GroupAggregate (cost=104.86..105.00 rows=8 width=12)
Group Key: case_id
-> Sort (cost=104.86..104.88 rows=8 width=4)
Sort Key: case_id
-> Seq Scan on tbl_pre_sales (cost=0.00..104.74 rows=8 width=4)
Filter: ((NOT is_draft) AND (case_id = ANY ('{9270,9271,9272,9273,9274,9275,9276,9277}'::integer[])))