QUERY PLAN
Aggregate (cost=93.34..93.35 rows=1 width=8)
-> Bitmap Heap Scan on tbl_clients (cost=4.80..93.17 rows=67 width=4)
Recheck Cond: (sales_rep = 1001)
-> Bitmap Index Scan on tbl_clients_sales_rep_idx (cost=0.00..4.78 rows=67 width=0)
Index Cond: (sales_rep = 1001)