[GitHub] [iceberg] HeartSaVioR commented on issue #2122: Spark can't read Iceberg table created from Presto

[GitBox <gi...@apache.org>]

HeartSaVioR commented on issue #2122:
URL: https://github.com/apache/iceberg/issues/2122#issuecomment-765113297


   That's a fundamental issue on "Spark" side, not "Iceberg" side. Spark only has the type "timestamp" which is used as "timestamp with timezone". Iceberg can't add the support of "timestamp without timezone" arbitrarily on Spark. Spark's "user defined type" is not a public API so Iceberg can't even expose the column of the type as UDT as well.
   
   There still has a possibility to expose it under "long" type, but you'll lose the characteristic of "timestamp" there. If we think it's still better than "don't support", probably a way to move forward.


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