"Hugues François" <[email protected]> escribió:
Hello,
It's difficult to give an answer since you don't tell us a lot about
unexpected results buy you could try something like (will not work
if a ft_cubo's polygon intersects different sigfre_cub_adm_munic
polygons) :
UPDATE
ft_cubo
SET
gidmunic = mgid
FROM (
SELECT DISTINCT ft_cubo.gid AS cgig, sigfre_cub_adm_munic.gid AS mgid
FROM sigfre_cub_adm_munic, ft_cubo
WHERE
ST_Intersects(ft_cubo.the_geom,sigfre_cub_adm_munic.the_geom)
) AS foo
WHERE gid = cgid
this neither work, is doing the same thing, look to the picture, there
are 2 towns, one is divided in many pieces, but this town is still the
same town and this towns id, is the same that the towns id of one
piece picture town. i need to do this. please
HTH
If it's not give the expected results, you can work on the subselect
query to return the expected unique gid pairs.
Hugues.
-----Message d'origine-----
De : [email protected]
[mailto:[email protected]] De la part de
[email protected]
Envoyé : samedi 5 avril 2014 21:28
À : [email protected]
Objet : [postgis-users] getting unexpected results on an ST_Intersects query
Hi folks, I'm having problems when I try to run a simple query to
update the gidmunic field of ft_cubo layer, and it assigns a value
that does not exists in said field, please, i need help , the two
layers are multipolygon type. what should I do?
UPDATE
ft_cubo
SET
gidmunic = sigfre_cub_adm_munic.gid
FROM sigfre_cub_adm_munic
WHERE
ST_Intersects(ft_cubo.the_geom,sigfre_cub_adm_munic.the_geom);
thanks in advance
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