QUERY PLAN
GroupAggregate (cost=107.17..107.34 rows=10 width=12)
Group Key: case_id
-> Sort (cost=107.17..107.19 rows=10 width=4)
Sort Key: case_id
-> Seq Scan on tbl_pre_sales (cost=0.00..107.00 rows=10 width=4)
Filter: ((NOT is_draft) AND (case_id = ANY ('{8759,8756,8651,8544,8502,8446,8444,8436,8398,8385}'::integer[])))