hvanhovell commented on code in PR #47464:
URL: https://github.com/apache/spark/pull/47464#discussion_r1692314400


##########
sql/core/src/main/scala/org/apache/spark/sql/functions.scala:
##########
@@ -5705,11 +5693,8 @@ object functions {
    * @group datetime_funcs
    * @since 3.2.0
    */
-  def session_window(timeColumn: Column, gapDuration: String): Column = {
-    withExpr {
-      SessionWindow(timeColumn.expr, gapDuration)
-    }.as("session_window")
-  }
+  def session_window(timeColumn: Column, gapDuration: String): Column =
+    session_window(timeColumn, lit(gapDuration))

Review Comment:
   This is now supported because of the small change I made to 
ResolveTimeWindows.



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