jzhuge commented on code in PR #35636:
URL: https://github.com/apache/spark/pull/35636#discussion_r843244976


##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/NoSuchItemException.scala:
##########
@@ -37,8 +37,12 @@ case class NoSuchNamespaceException(
     override val cause: Option[Throwable] = None)
   extends AnalysisException(message, cause = cause) {
 
+  def this(namespace: Array[String], cause: Option[Throwable]) = {
+    this(s"Namespace '${namespace.quoted}' not found", cause = cause)
+  }
+
   def this(namespace: Array[String]) = {
-    this(s"Namespace '${namespace.quoted}' not found")
+    this(namespace, cause = None)

Review Comment:
   Actually, this is necessary for Java code to call `new 
NoSuchNamespaceException(namespace)` without a cause.
   
   The following constructor (default value `None` to `cause`) will not work 
for Java:
   ```
     def this(namespace: Array[String], cause: Option[Throwable] = None)
   ```
   
   How about having these 2 constructors?
   ```
     def this(namespace: Array[String], cause: Throwable)
     def this(namespace: Array[String])
   ```
   



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