QUERY PLAN
Aggregate (cost=75.86..75.87 rows=1 width=8)
-> Bitmap Heap Scan on tbl_clients (cost=4.59..75.76 rows=40 width=4)
Recheck Cond: (sales_rep = 5087)
-> Bitmap Index Scan on tbl_clients_sales_rep_idx (cost=0.00..4.58 rows=40 width=0)
Index Cond: (sales_rep = 5087)