I want to push this, as I am still having the problem, that the results are
wrong.
I was assuming that the subquery (SELECT source FROM rout_test WHERE source
690000) would set a focus to the nodes I am interested in.
(Additionally I sorted out costs to other targets and added some ordering.)
Probably my assumption is wrong as the result doesn't look correct at all.
All source = target pairs do have the expected cost 0, but all other rows
have the value 1.79769313486232e+308
So I would like to ask whether my assumption is correct:
Is the function really supposed to work with a subset of nodes ?
What does the value value 1.79769313486232e+308 mean ?
BTW: I do have reverse costs, but don't have negative costs.
Trying to solve the complete matrix for all nodes leads to an out of memory
error.
I was able to solve the first problem concerning the memory issue when using
drive_destination,
so I can solve my task. Nevertheless I would like to try and verify the APSP
implementation