Jonathan Mayer created CALCITE-2758:
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Summary: Replace ESRI based Geofunctions with LocationTech (JTS +
proj4j)
Key: CALCITE-2758
URL: https://issues.apache.org/jira/browse/CALCITE-2758
Project: Calcite
Issue Type: Improvement
Components: core
Affects Versions: 1.17.0
Reporter: Jonathan Mayer
Assignee: Julian Hyde
I will be working on this functionality outside the calcite repo ( for now).
The project's current location is [https://github.com/jonrmayer/geofunctions]
It is intended to be a like-for-like replacement of the existing
calcite-core/runtime/GeoFunctions.java file.
With some minor edits to calcite-master pom /calcite-core pom - it is feasible
to drop this in as a replacement - adding the calcite imports etc to the top of
the file.
Tests however will be a problem - eg. spatial.iq will no longer be relevant.
ESRI outputs geometries to JSON whereas JTS outputs WKT - this will need to be
rewritten.
My current plan is to focus on implementing as many functions as possible with
basic tests and then to improve on the (very) basic Maven testing before
letting anyone know that I am reasonably happy.
I should imagine that spatial.iq will have to wait a fair while - I will need
it to test Geometry Collections for eg ST_DWithin/ST_Collect etc and hope that
the maven test are enough from a confidence perspective.
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