jcsherin commented on code in PR #13201:
URL: https://github.com/apache/datafusion/pull/13201#discussion_r1836709044


##########
datafusion/proto/tests/cases/roundtrip_logical_plan.rs:
##########
@@ -911,6 +912,9 @@ async fn roundtrip_expr_api() -> Result<()> {
         count_distinct(lit(1)),
         first_value(lit(1), None),
         first_value(lit(1), Some(vec![lit(2).sort(true, true)])),
+        functions_window::nth_value::first_value(lit(1)),
+        functions_window::nth_value::last_value(lit(1)),

Review Comment:
   These expression functions (`first_value` and `last_value`) did not exist 
before. There is only `nth_value` here:
   
https://docs.rs/datafusion/latest/datafusion/logical_expr/window_function/index.html#functions
   
   I guess it is alright. 
   
   Thanks for adding them 👍 
   
   



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