Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/20787#discussion_r175983804
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala
---
@@ -881,10 +881,10 @@ object DateTimeUtils {
* Returns number of months between time1 and time2. time1 and time2 are
expressed in
* microseconds since 1.1.1970.
*
- * If time1 and time2 having the same day of month, or both are the last
day of month,
- * it returns an integer (time under a day will be ignored).
+ * If time1 and time2 are on the same day of month, or both are the last
day of month,
+ * returns an integer (time under a day will be ignored).
--- End diff --
It seems a bit awkward because it actually returns a double. Shall we fix
this like .. `returns an integer (time under a day will be ignored)` -> `time
under a day will be ignored.`?
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