On Tue, Mar 10, 2015 at 7:27 PM, Martin Davis <[email protected]> wrote:
> Well, good that there's an issue for this.
>
> I don't understand how the SQL can be changed to not require a spatial
> index? What I'm suggesting is a way to use the spatial filter on the
> underlying geometry, but return a different geometry column. Not sure if
> this is possible in the current GS architecture?
>
>
It is, you just have to figure out that your column is built at runtime by
the virtual table definition, and thus does not have a index, and encode
the search queries accordingly.
Virtual table is just a special case of not having a spatial index (the
other being having a real table without a spatial index).
But yes, you cannot query the original geometry because GeoServer cannot
know how your computed geometry relates to the original geometry, and
Oracle does not know either afaik.... I believe other software allows you a
special parameter where you could embed a simple bbox query against the
original data... but that is really simpleton, in GeoServer we don't just
have bbox searches... but maybe
we could have some logic that tries to map back the query down to a bbox
one, and have a primary filter/secondary filter approach (thus, keeping the
real query against the computed geometry, but injecting a simple bbox one
against the original geometry too)
Cheers
Andrea
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