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List: postgis-users
Subject: Re: [postgis-users] Problem updating geometry in a record
From: Birgit Laggner <birgit.laggner () ti ! bund ! de>
Date: 2015-09-29 7:00:22
Message-ID: 560A3706.7000904 () ti ! bund ! de
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Hi Bob,
I had the problem sometimes that st_union() result was NULL. Perhaps
that's the case with your query, too? Is it necessary to use st_union()?
Otherwise you could replace it with st_collect(), if you just want to
collect all geometries into a multilinestring. That's more robust
because no geoprocessing is needed...
Regards,
Birgit
Am 28.09.2015 um 22:46 schrieb Bistrais, Bob:
>
> I have been able to derive a geometry from a query. I want to insert
> that geometry into a Multilinestring field. I have some SQL code to
> do it. When I run the code, the output say that the query was
> successful. But I don’t see the geometry inserted into the table.
> Here is the code:
>
> update highschools_aroo set routegeom =
>
> (SELECT ST_Union(geom) as mygeom from (SELECT pt.geom
>
> FROM pgr_dijkstra(
>
> 'SELECT gid AS id,
>
> sourceroute::integer as source,
>
> targetroute::integer as target,
>
> (feet / 5280)::double precision AS cost,
>
> feet::double precision as reverse_cost
>
> FROM ngrdsaroo2',2465,1713,false,true)
>
> as di
>
> JOIN ngrdsaroo2 pt on di.id2 = pt.gid) as foo)
>
> WHERE source_node = 2465 and target_node = 1713;
>
> -As mentioned, this runs with no errors, but the geometry field is not
> updated. Any suggestions?
>
>
> Thanks,
>
> Bob
>
>
>
> _______________________________________________
> postgis-users mailing list
> postgis-users@lists.osgeo.org
> http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users
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Hi Bob,<br>
<br>
I had the problem sometimes that st_union() result was NULL. Perhaps
that's the case with your query, too? Is it necessary to use
st_union()? Otherwise you could replace it with st_collect(), if you
just want to collect all geometries into a multilinestring. That's
more robust because no geoprocessing is needed...<br>
<br>
Regards,<br>
<br>
Birgit<br>
<br>
<br>
<div class="moz-cite-prefix">Am 28.09.2015 um 22:46 schrieb
Bistrais, Bob:<br>
</div>
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<div class="WordSection1">
<p class="MsoNormal">I have been able to derive a geometry from
a query. I want to insert that geometry into a
Multilinestring field. I have some SQL code to do it. When I
run the code, the output say that the query was successful.
But I don’t see the geometry inserted into the table. Here is
the code:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">update highschools_aroo set routegeom = <o:p></o:p></p>
<p class="MsoNormal">(SELECT ST_Union(geom) as mygeom from
(SELECT pt.geom<o:p></o:p></p>
<p class="MsoNormal"> FROM pgr_dijkstra(<o:p></o:p></p>
<p class="MsoNormal"> 'SELECT gid
AS id,<o:p></o:p></p>
<p class="MsoNormal">
sourceroute::integer as source,<o:p></o:p></p>
<p class="MsoNormal">
targetroute::integer as target,<o:p></o:p></p>
<p class="MsoNormal">
(feet / 5280)::double precision AS cost,<o:p></o:p></p>
<p class="MsoNormal">
feet::double precision as reverse_cost<o:p></o:p></p>
<p class="MsoNormal">
FROM ngrdsaroo2',2465,1713,false,true)
<o:p></o:p></p>
<p class="MsoNormal">
as di<o:p></o:p></p>
<p class="MsoNormal">
JOIN ngrdsaroo2 pt on di.id2 = pt.gid) as foo)<o:p></o:p></p>
<p class="MsoNormal">
WHERE source_node = 2465 and target_node = 1713;<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">-As mentioned, this runs with no errors,
but the geometry field is not updated. Any suggestions?<o:p></o:p></p>
<p class="MsoNormal"><br>
Thanks,<o:p></o:p></p>
<p class="MsoNormal">Bob<o:p></o:p></p>
</div>
<br>
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