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 ('{9249,9242,9240,9247,9246,9241,9239,9237,9238,9236,9234,9235,9231,9229,9232,9228,9225,9224,9221,9219}'::integer[])))