Greetings all,
I've been working on developing a new JDBC DataStore for HP Vertica
databases. Thus far, I seem to be successful in getting a new connection
and ability to import data, but now I've been trying to work on getting the
database's custom commands used by GeoServer. I'm a bit ignorant in how
this works.
Currently, I have a custom FilterToSQL class, VerticaFilterToSQL, which
interprets an "Intersects" filter to write out an ST_Intersects command, in
accordance with the database's specifications. This part makes sense, as it
is a binary spatial operator comparing two geometries.
However, I am attempting to write a custom function called STV_Intersects
<https://my.vertica.com/docs/8.1.x/HTML/index.htm#Authoring/AnalyzingData/Geospatial/GeospatialAnalytics/STV_IntersectScalarFunctionVs.TransformFunction.htm>
(documentation linked - there's actually two versions but my question is
general for both). This function does not simply compare two geometries,
but actually looks at the entire table for intersecting polygons.
The best I have come up with thus far is that perhaps I need to write a
custom visitor, as it does not fall under visitBinarySpatialOperator.
Would anyone have any suggestions or pointers in the right direction for me
regarding how to write a custom function like this?
Cheers,
Travis
--
Travis Brundage
Software Engineer | Boundless
[email protected]
250.888.2820
@boundlessgeo
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