QUERY PLAN
Aggregate (cost=88.53..88.54 rows=1 width=8)
-> Bitmap Heap Scan on tbl_clients (cost=4.73..88.38 rows=59 width=4)
Recheck Cond: (sales_rep = 1001)
-> Bitmap Index Scan on tbl_clients_sales_rep_idx (cost=0.00..4.72 rows=59 width=0)
Index Cond: (sales_rep = 1001)