[postgis-devel] Difference between ST_CollectionExtract and ST_Dimension

Paul Ramsey pramsey at opengeo.org
Thu Sep 23 12:33:16 PDT 2010


Sure, sounds good to me, another 2.0 backward-break ticket. At least
it isn't a long-time function.

P

On Thu, Sep 23, 2010 at 12:20 PM, strk <strk at keybit.net> wrote:
> On Thu, Sep 23, 2010 at 11:40:15AM -0700, Paul Ramsey wrote:
>> *sigh*
>>
>> Yes, probably a bad decision on my part. Yet more reasons to ... I
>> don't know. There has to be some way to process this stuff more
>> completely and avoid errors like this.
>
> My proposal is still valid:
>  + ST_Extract(0:Puntual, 1:Lineal, 2:Areal)
>  - ST_CollectionExtract [@deprecate]
>
> Could be also ST_DimensionExtract :)
>
> --strk;
>
>>
>> P.
>>
>> On Thu, Sep 23, 2010 at 11:25 AM, Andrea Peri 2007 <aperi2007 at gmail.com> wrote:
>> >  Hi,
>> >
>> > I notice the ST_Dimension() return
>> > 0 = Point
>> > 1 = Line
>> > 2 = Polygon
>> >
>> > instead
>> >
>> > ST_CollectionExtract() use
>> > 1 = Point
>> > 2 = Line
>> > 3 = Polygon
>> >
>> > Perhaps this is a unwanted difference ?
>> >
>> > Regards,
>> >
>> > Andrea Peri.
>> >
>> >
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> --
>
>  ()   Free GIS & Flash consultant/developer
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