cloud-fan commented on a change in pull request #25355:
[SPARK-28615][SQL][DOCS] Add a guide line for dataframe functions to say column
signature function is by default
URL: https://github.com/apache/spark/pull/25355#discussion_r310559578
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File path: sql/core/src/main/scala/org/apache/spark/sql/functions.scala
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@@ -55,6 +55,9 @@ import org.apache.spark.util.Utils
* `regr_count` is an example of a function that is built-in but not defined
here, because it is
* less commonly used. To invoke it, use `expr("regr_count(yCol, xCol)")`.
*
+ * We add these functions with `Column` type arguments by default. All the
other variants are there
Review comment:
+1
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