[Cartoweb-users] dijkstra

[Eggenschwiler Raphael]

Hi everyone !

I try to use this pgdijkstra on my data with :

SELECT arc_num_nod_src as "source",arc_num as "id",arc_num_nod_des as
"target",arc_cost as "cost" FROM TAB_ARC;

source   id    target    cost
0         6259    4769    0
4769    6260    4770    0
4770    6261    4771    0
4771    6262    4772    0
4772    6263    4773    0
0         6264    4775    0
4775    6265    4776    0
4776    6266    4777    0
4777    6267    4778    0
4778    6268    4779    0
4779    6269    4780    0
4780    6270    4781    0
0         6271    4783    0
4783    6272    4784    0
4784    6273    4785    0
4785    6274    4786    0
4786    6275    4787    0
4787    6276    4788    0
4788    6277    4789    0
4789    6278    4790    0
0         6279    4792    0
4792    6280    4793    0

But when I try this one :

select * from shortest_path('SELECT arc_num_nod_src as "source",arc_num as
"id",arc_num_nod_des as "target",arc_cost as "cost" FROM
TAB_ARC',4769,4770,false,false);

I become this message :

ERROR:  Error computing path: Source vertex not found

Can someone help me ??
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