[postgis-users] ST_Union (8.4) and TopologyException

[Simon Greener]

Folks,

Sorry, yes, I was creating a table. I have visualised the result QGIS and the result looks right.

create table simon.si_result 
as 
select i.si_grouping_f_id, ST_Difference(s.geom,i.geom) as geom
  from simon.si_grouping_f s
       inner join 
       (select si_grouping_f_id, ST_Union(a.geom) as geom
          from simon.si_grouping_f_store_f a
         where geom is not null 
         group by si_grouping_f_id
        ) as i
        on (s.id = i.si_grouping_f_id);

S
On Sun, 09 Aug 2009 00:47:30 +1000, Paragon Corporation <lr at pcorp.us> wrote:

> Paul,
>> It's odd for union to return no result.
>
> I think he may have been dumping into a new table thus no results message
> though I thought inserts stated the number of records created, but can't
> recall if a select .. into bulk load does or not.
>
>> I can confirm that my data is now successfully processed by PostGIS's
> ST_Union though it isn't all that fast:
>>
>> "Query returned successfully with no result in 5011922 ms." = 1hr 23min
> which is pretty slow.
>
> Simon is that correct that you were dumping into a new table?
> I assumed you got something if you said it works correctly now.
>
> Thanks,
> Regina
>
>
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-- 
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