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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2019/04/10 01:57:09 UTC

[GitHub] [spark] cloud-fan commented on issue #24332: [SPARK-27423][SQL] Cast DATE <-> TIMESTAMP according to the SQL standard

cloud-fan commented on issue #24332: [SPARK-27423][SQL] Cast DATE <-> TIMESTAMP according to the SQL standard
URL: https://github.com/apache/spark/pull/24332#issuecomment-481503356
 
 
   a correction: the timestamp in Spark is TIMESTAMP WITH LOCAL TIMEZONE. It's non-SQL-standard(but Oracle has it) and is a little different from TIMESTAMP WITH TIMEZONE.
   
   TIMESTAMP WITH TIMEZONE means, each timestamp value has an associated timezone.
   
   TIMESTAMP WITH LOCAL TIMEZONE means, all the timestamp values have a session-global associated timezone.
   
   The casting behavior should be the same though.

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