QUERY PLAN
GroupAggregate (cost=112.76..112.78 rows=1 width=12)
Group Key: case_id
-> Sort (cost=112.76..112.77 rows=1 width=4)
Sort Key: case_id
-> Seq Scan on tbl_pre_sales (cost=0.00..112.75 rows=1 width=4)
Filter: ((created_by = 1000) AND (case_id = ANY ('{9212,9210,9206,9200,9094,9059,8951,8874,8852,8767}'::integer[])))