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 ('{9256,9255,9243,9226,9227,9225,9224,9221,9219,9223,9220,9218,9217,9215,9212,9213,9216,9214,9211,9210}'::integer[])))