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 ('{9267,9266,9265,9264,9263,9259,9256,9255}'::integer[])))