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