Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/20787#discussion_r173619271
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala ---
@@ -2708,7 +2708,8 @@ object functions {
def minute(e: Column): Column = withExpr { Minute(e.expr) }
/**
- * Returns number of months between dates `date1` and `date2`.
+ * Returns number of months between dates `date1` and `date2`. If
`date1` is later than `date2`,
+ * then the result is positive.
--- End diff --
Can we resemble this:
https://github.com/apache/spark/blob/6e36d8d56279a2c5c92c8df8e89ee99b514817e7/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/DateTimeUtils.scala#L884-L888
?
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