[GitHub] [beam] damccorm opened a new issue, #19922: Revisit timestamp and duration representation

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damccorm opened a new issue, #19922:
URL: https://github.com/apache/beam/issues/19922

   The current proto representation of timesetamp and durations in Beam is either raw int64s or the well-known Google protobuf types "google.protobuf.timestamp" and "google.protobuf.duration". Apache Beam uses int64 MAX and MIN as sentinel values for an ****inf watermark and -inf watermark. However, the google.protobuf.timestamp is compliant with RFC3339, meaning it can only represent date-times between 0001-01-01 and 9999-12-31. This is not the same as the int64 MAX and MIN representation. The questions remain:
    * What should the timestamp and duration representations be?
    * What units should the timestamps and duration be? Nanos? Micros?
    * What algebra is allowed when dealing with timestamps and durations? What is needed?
   
   See:
    * [https://lists.apache.org/thread.html/c8e7d8dc7d94487fae23fa2b74ee61aec93c94abbcbef3329ffbf3bd@%3Cdev.beam.apache.org%3E](https://lists.apache.org/thread.html/c8e7d8dc7d94487fae23fa2b74ee61aec93c94abbcbef3329ffbf3bd@%3Cdev.beam.apache.org%3E)
    * [https://lists.apache.org/thread.html/27fe9aa5b33dbee97db1bc924ee410048137e4fe97d9c79d131c010c@%3Cdev.beam.apache.org%3E](https://lists.apache.org/thread.html/27fe9aa5b33dbee97db1bc924ee410048137e4fe97d9c79d131c010c@%3Cdev.beam.apache.org%3E)
   
    
   
   Imported from Jira [BEAM-8738](https://issues.apache.org/jira/browse/BEAM-8738). Original Jira may contain additional context.
   Reported by: rohdesam.


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