QUERY PLAN
GroupAggregate (cost=133.13..133.15 rows=1 width=12)
Group Key: case_id
-> Sort (cost=133.13..133.14 rows=1 width=4)
Sort Key: case_id
-> Seq Scan on tbl_pre_sales (cost=0.00..133.12 rows=1 width=4)
Filter: ((created_by = 1001) AND (case_id = ANY ('{9258,9257,9256,9255,9254,9249,9077,9020,9002,8939,8679,8623,8548,8523,8101,7722,6934,6918,6917,6888}'::integer[])))