[GitHub] [spark] yaooqinn commented on a diff in pull request #42549: [SPARK-44860] Add SESSION_USER function

["yaooqinn (via GitHub)" <gi...@apache.org>]

yaooqinn commented on code in PR #42549:
URL: https://github.com/apache/spark/pull/42549#discussion_r1299292387


##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/misc.scala:
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@@ -302,6 +302,24 @@ case class CurrentUser() extends LeafExpression with Unevaluable {
   final override val nodePatterns: Seq[TreePattern] = Seq(CURRENT_LIKE)
 }
 
+// scalastyle:off line.size.limit
+@ExpressionDescription(
+  usage = """_FUNC_() - connected user name.""",
+  examples = """
+    Examples:
+      > SELECT _FUNC_();
+       mockingjay
+  """,
+  since = "3.5.0",
+  group = "misc_funcs")
+// scalastyle:on line.size.limit
+case class SessionUser() extends LeafExpression with Unevaluable {

Review Comment:
   why not register as an alias with CurrentUser



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