| Nested Loop Left Join (cost=0.28..9.09 rows=1 width=606) |
| Join Filter: (cl.id = c.client_class) |
| -> Index Scan using tbl_clients_pkey on tbl_clients c (cost=0.28..7.63 rows=1 width=502) |
| Index Cond: (id IS NULL) |
| -> Seq Scan on tbl_client_classes cl (cost=0.00..1.04 rows=4 width=44) |