HyukjinKwon commented on issue #25678: [SPARK-28973][SQL] Add `TimeType` and 
support `java.time.LocalTime` as its external type.
URL: https://github.com/apache/spark/pull/25678#issuecomment-530177325
 
 
   > Why do we need a new data type?
   
   Seems like that's answered in PR description. It targets to follow ANSI I 
guess:
   
   > According to the SQL standard, a value of data type TIME comprises values 
of the datetime fields HOUR, MINUTE and SECOND. It is always a valid time of 
day.

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