[GitHub] [spark] LinhongLiu opened a new pull request #26134: Calendarinterval

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

LinhongLiu opened a new pull request #26134: Calendarinterval
URL: https://github.com/apache/spark/pull/26134
 
 
   ### What changes were proposed in this pull request?
   Current CalendarInterval has 2 fields: months and microseconds. This PR try to change it
   to 3 fields: months, days and microseconds. This is because one logical day interval may
   have different number of microseconds (daylight saving).
   
   
   ### Why are the changes needed?
   One logical day interval may have different number of microseconds (daylight saving).
   For example, in PST timezone, there will be 25 hours from 2019-11-2 12:00:00 to
   2019-11-3 12:00:00
   
   
   ### Does this PR introduce any user-facing change?
   no
   
   ### How was this patch tested?
   unit test and new added test cases
   

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