QUERY PLAN
GroupAggregate (cost=109.56..109.58 rows=1 width=12)
Group Key: case_id
-> Sort (cost=109.56..109.57 rows=1 width=4)
Sort Key: case_id
-> Seq Scan on tbl_pre_sales (cost=0.00..109.55 rows=1 width=4)
Filter: ((created_by = 1000) AND (case_id = ANY ('{8693,8762,8761,8760,8758,8759,8754,8751,8755,8756}'::integer[])))