Hi, I have writen a proposal wiki page for this new feature.
https://github.com/geotools/geotools/wiki/Implement-a-pure-java-Dbase-indexing-to-optimize-shapefile-access
Best regardsAlvaro
De: A Huarte <[email protected]>
Para: Andrea Aime <[email protected]>
CC: "[email protected]"
<[email protected]>
Enviado: Lunes 9 de noviembre de 2015 2:21
Asunto: Re: [Geotools-devel] [NEW FEATURE] Implement a pure java Dbase indexing
Hi, in order to avoid confusion, I would like to mention that I modified the
definition of the classes inheriting IndexManager of a new DbaseIndexManager as
previsous step to integrate fully the spatial and dbase indexing managers.
https://github.com/geotools/geotools/compare/master...ahuarte47:GEOS-6842_CdxDbaseIndex#diff-92177fcbab0ca3e01c1a3b7314142838R44
Sorry for the inconvenience.
Best regardsAlvaro
De: Andrea Aime <[email protected]>
Para: A Huarte <[email protected]>
CC: Jody Garnett <[email protected]>;
"[email protected]" <[email protected]>
Enviado: Sábado 7 de noviembre de 2015 11:48
Asunto: Re: [Geotools-devel] [NEW FEATURE] Implement a pure java Dbase indexing
On Sat, Nov 7, 2015 at 9:44 AM, A Huarte <[email protected]> wrote:
Hi Jody, if with qnx files you refer to spatial index files, actually the
response is no.
The code only resolves pure alphanumeric filters, and it is cheched before
execute this indexing. When an spatial or fid filter is present, then the
current behavior in the shapefile provider is respected and the other filters
are executed.
Merging fid from both the spatial and alphanumeric part would indeed be a plus,
it's just a bit tricky to perform a correctextraction of the two parts from the
whole filter.
See:https://github.com/geotools/geotools/compare/master...ahuarte47:GEOS-6842_CdxDbaseIndex#diff-06c0794a50eeb31f89a201b87d5ca19cR363
https://github.com/geotools/geotools/compare/master...ahuarte47:GEOS-6842_CdxDbaseIndex#diff-a88ff865d43d7e251586c8e2231cbaa1R64
https://github.com/geotools/geotools/compare/master...ahuarte47:GEOS-6842_CdxDbaseIndex#diff-a88ff865d43d7e251586c8e2231cbaa1R120
But if it is desired, it is feasible mix the spatial and atribute indexing. We
can add easily the spatial operators to the filter evaluation and call to the
current spatial index managers.
Yes, this would be nice.
I just glanced over the diff (a proper review is going to take hours), why did
you need to add a complex property accessor? We already have xpath
basedaccessors, but what's more confusing, is that shapefiles only provide flat
expressions.Property accessors once registered apply system wide, not just to a
particular store, so one should be quite carefulwhen adding them.
CheersAndrea
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