[pgrouting-users] Problem with query
Worth Lutz
wal3 at mindspring.com
Fri Jul 1 09:11:54 PDT 2016
Hi Vicky,
How can I tell which ones to use?
I've got v2.2.3 of pgRouting.
*Worth Lutz*
On 7/1/2016 11:45 AM, Vicky Vergara wrote:
> Hello Worth,
>
> Unfortunately pgr_bddijkstra has bugs.
> I must tell you the history of pgRouting so that you can understand why:
> V2.0 was to gather and reorganize the functions of pgRouting,
> preparing for a rewrite, to remove bugs, and unify internal code.
> V2.x are rewrites of functions, we are gradually rewriting the
> functions and we are basically starting with the ones that are c++
> boost::graph::function based.
> pgr_bdDijkstra is not one of them.
>
>
> If you can this issue to the issue list:
> https://github.com/pgRouting/pgrouting/issues
> with your data and queries, so that we are able to reproduce,
> and when time comes we have a test case when doing the rewrite of that
> function.
>
> Vicky
>
>
> On Fri, Jul 1, 2016 at 10:08 AM, Worth Lutz <wal3 at mindspring.com
> <mailto:wal3 at mindspring.com>> wrote:
>
> Hi All,
>
> Can anyone explain the strange results (see below) I'm getting?
>
> ~$ apt-show-versions postgresql
> postgresql:all/trusty-updates 9.3+154ubuntu1 uptodate
>
> ~$ apt-show-versions postgis
> postgis:amd64/trusty 2.1.4+dfsg-3~trusty uptodate
>
> ~$ apt-show-versions postgresql-9.3-pgrouting
> postgresql-9.3-pgrouting:amd64/trusty 2.2.3-release-ppa1~trusty1
> uptodate
>
>
> The first query gives me 4 values and the second has the 'id2'
> value empty.
>
> SELECT
> pgr_bdDijkstra(
> 'SELECT id_base AS id, source, target, cost_len AS cost,
> rcost_len AS reverse_cost FROM _rt_geom_streets_base',
> 11, 6, TRUE, TRUE
> );
> pgr_bddijkstra
> ---------------------------------
> (0,11,2087858,482.722955703)
> (1,3549,2082803,275.837140233)
> (2,24976,2086339,272.953707069)
> (3,20623,2086101,484.096255058)
> (4,48115,2085508,388.315542378)
> (5,47218,2084557,480.30350456)
> (6,8387,2094458,476.8149761)
> (7,248,2093906,255.35844989)
> (8,1348,2097029,247.294429215)
> (9,1536,2090136,339.718631568)
> (10,6465,2091005,330.978413622)
> (11,3740,2087980,415.137012292)
> (12,1504,2095856,375.236169771)
> (13,1505,2090458,466.482679764)
> (14,1130,2089855,481.831396537)
> (15,1116,2089664,470.256648783)
> (16,1117,2139494,262.774003918)
> (17,2907,2139496,73.1337200735)
> (18,765,2131538,172.32970181)
> (19,6,-1,0)
> (20 rows)
>
>
> SELECT *
> FROM
> pgr_bdDijkstra(
> 'SELECT id_base AS id, source, target, cost_len AS cost,
> rcost_len AS reverse_cost FROM _rt_geom_streets_base',
> 11, 6, TRUE, TRUE
> );
> seq | id1 | id2 | cost
> -----+-------+-----+---------------
> 0 | 11 | | 482.722955703
> 1 | 3549 | | 275.837140233
> 2 | 24976 | | 272.953707069
> 3 | 20623 | | 484.096255058
> 4 | 48115 | | 388.315542378
> 5 | 47218 | | 480.30350456
> 6 | 8387 | | 476.8149761
> 7 | 248 | | 255.35844989
> 8 | 1348 | | 247.294429215
> 9 | 1536 | | 339.718631568
> 10 | 6465 | | 330.978413622
> 11 | 3740 | | 415.137012292
> 12 | 1504 | | 375.236169771
> 13 | 1505 | | 466.482679764
> 14 | 1130 | | 481.831396537
> 15 | 1116 | | 470.256648783
> 16 | 1117 | | 262.774003918
> 17 | 2907 | | 73.1337200735
> 18 | 765 | | 172.32970181
> 19 | 6 | | 0
> (20 rows)
>
>
>
>
> --
> *Worth Lutz*
>
>
>
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>
> --
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> Vicky Vergara
> Operations Research
>
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