Csaba Ringhofer created IMPALA-11745:
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Summary: Add Hive's ESRI geospatial functions as builtins
Key: IMPALA-11745
URL: https://issues.apache.org/jira/browse/IMPALA-11745
Project: IMPALA
Issue Type: New Feature
Components: Frontend
Reporter: Csaba Ringhofer
Hive has added the Esri Hive UDFs as builtin functions in HIVE-26223.
The original Hive Esri source:
https://github.com/Esri/spatial-framework-for-hadoop
A simple (but inefficient) way to add postgis style geospatial support in
Impala is to import these functions through Hive and add them as builtins. This
is possible as Impala supports Hive UDFs, but is much slower than a native
implementation could be.
My plan is to add these functions depending on a flag, e.g. uf
geospatial_library=hive_esri. This would allow native implementations to be
added later and let users choose between Hive compatibility and speed. It could
also make sense override only the more critical functions with native ones, but
it may turn out that the binary format used in ESRI is suboptimal for a native
implementation.
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