Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/7589#discussion_r35691621
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala ---
@@ -2392,6 +2414,13 @@ object functions {
def minute(columnName: String): Column = minute(Column(columnName))
/**
+ * Returns number of months between dates date1 and date2.
+ * @group datetime_funcs
+ * @since 1.5.0
+ */
+ def months_between(l: Column, r: Column): Column = MonthsBetween(l.expr,
r.expr)
--- End diff --
use `date1` and `date2` to be consistent with doc
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