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https://issues.apache.org/jira/browse/IMPALA-11745?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17899904#comment-17899904
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ASF subversion and git services commented on IMPALA-11745:
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Commit ba17491bc090250d0895303434285785b5e77f3a in impala's branch
refs/heads/master from Peter Rozsa
[ https://gitbox.apache.org/repos/asf?p=impala.git;h=ba17491bc ]
IMPALA-11889: Docs for ESRI geospatial functions
This change adds documentation for geospatial functions added in
IMPALA-11745.
Change-Id: I5f765927a0856e3034968462514536fd1fffcea5
Reviewed-on: http://gerrit.cloudera.org:8080/22076
Tested-by: Impala Public Jenkins <[email protected]>
Reviewed-by: Csaba Ringhofer <[email protected]>
> 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
> Assignee: Peter Rozsa
> Priority: Major
> Labels: geospatial
> Fix For: Impala 4.3.0
>
>
> 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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