QUERY PLAN
GroupAggregate (cost=105.76..105.94 rows=10 width=12)
Group Key: case_id
-> Sort (cost=105.76..105.79 rows=10 width=4)
Sort Key: case_id
-> Seq Scan on tbl_pre_sales (cost=0.00..105.59 rows=10 width=4)
Filter: (case_id = ANY ('{8679,8623,8548,8523,8101,7722,6934,6917,6918,6888}'::integer[]))