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 = 1001) AND (case_id = ANY ('{9260,9258,9257,9256,9255,9249,9077,9254,9020,9002}'::integer[])))