[pgrouting-users] pgr_createTopology

[Daniel Kastl]

Hi Stephen,

Thanks for looking into this!
I just wanted to mention that it would be better, if a pull request would
be in "develop" branch (I already didn't look careful recently and just
clicked "merge pull request" accidentally and it was merged into master
branch).

So in general making changes in "develop" branch is better, because
"develop" might be also ahead of "master" anyway.

Daniel






On Tue, Dec 3, 2013 at 11:54 AM, Stephen Mather
<stephen at smathermather.com>wrote:

> I don't know if I did this correctly, but:
>
> https://github.com/pgRouting/pgrouting/pull/221
>
>
>
> On Sat, Nov 30, 2013 at 4:43 PM, Stephen Mather <stephen at smathermather.com
> > wrote:
>
>> Done.  Issue #220 <https://github.com/pgRouting/pgrouting/issues/220>.
>>
>> Thanks,
>> Best,
>> Steve
>>
>>
>> On Sat, Nov 30, 2013 at 2:52 PM, Stephen Mather <
>> stephen at smathermather.com> wrote:
>>
>>> Cool, I'll write a ticket.  It would be mostly useful in the case of
>>> e.g. tutorial development.
>>>
>>> Best,
>>> Steve
>>>
>>>
>>> On Sat, Nov 30, 2013 at 2:46 PM, Stephen Woodbridge <
>>> woodbri at swoodbridge.com> wrote:
>>>
>>>> On 11/30/2013 2:18 PM, Stephen Mather wrote:
>>>>
>>>>> Is pgr_createTopology deterministic in how it numbers nodes in a built
>>>>> topology?
>>>>>
>>>>
>>>> Stephen,
>>>>
>>>> What do you mean by this?
>>>>
>>>> If you build a topology on the same edge table twice, do we guarantee
>>>> that the nodes numbers will be identical?
>>>>
>>>> I think the answer is NO, on line:303 of src/common/sql/pgrouting_topology.sql
>>>> there is no "order by" clause. This would need to be added to make it
>>>> deterministic because relational set theory does not guarantee order of
>>>> records in a query without explicitly including and "order by" clause.
>>>>
>>>> Write a bug if you think this is needed and state why.
>>>>
>>>> Thanks,
>>>>   -Steve
>>>> _______________________________________________
>>>> Pgrouting-users mailing list
>>>> Pgrouting-users at lists.osgeo.org
>>>> http://lists.osgeo.org/mailman/listinfo/pgrouting-users
>>>>
>>>
>>>
>>
>
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-- 
Georepublic UG & Georepublic Japan
eMail: daniel.kastl at georepublic.de
Web: http://georepublic.de
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