QUERY PLAN
GroupAggregate (cost=129.48..129.83 rows=20 width=12)
Group Key: case_id
-> Sort (cost=129.48..129.53 rows=20 width=4)
Sort Key: case_id
-> Seq Scan on tbl_pre_sales (cost=0.00..129.05 rows=20 width=4)
Filter: ((NOT is_draft) AND (case_id = ANY ('{9256,9255,9243,9226,9227,9225,9224,9221,9219,9223,9220,9218,9217,9215,9212,9213,9216,9214,9211,9210}'::integer[])))