QUERY PLAN
GroupAggregate (cost=133.40..133.42 rows=1 width=12)
Group Key: case_id
-> Sort (cost=133.40..133.40 rows=1 width=4)
Sort Key: case_id
-> Seq Scan on tbl_pre_sales (cost=0.00..133.39 rows=1 width=4)
Filter: ((created_by = 1001) AND (case_id = ANY ('{9277,9276,9275,9274,9273,9272,9271,9270,9269,9268,9267,9266,9265,9264,9263,9260,9258,9257,9256,9255}'::integer[])))