QUERY PLAN
GroupAggregate (cost=106.06..106.08 rows=1 width=12)
Group Key: case_id
-> Sort (cost=106.06..106.07 rows=1 width=4)
Sort Key: case_id
-> Seq Scan on tbl_pre_sales (cost=0.00..106.05 rows=1 width=4)
Filter: ((created_by = 5016) AND (case_id = ANY ('{6899,6631,6613,6562,6532,6503,1290,578,567,560}'::integer[])))