cloud-fan commented on a change in pull request #26808: [SPARK-30184][SQL]
Implement a helper method for aliasing functions
URL: https://github.com/apache/spark/pull/26808#discussion_r355816787
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File path: sql/core/src/main/scala/org/apache/spark/sql/functions.scala
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@@ -431,7 +431,7 @@ object functions {
* @since 2.0.0
*/
def first(e: Column, ignoreNulls: Boolean): Column = withAggregateFunction {
- new First(e.expr, Literal(ignoreNulls))
+ new First("first", e.expr, Literal(ignoreNulls))
Review comment:
We can add a constructor to provide a default name.
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