cloud-fan commented on a change in pull request #30974:
URL: https://github.com/apache/spark/pull/30974#discussion_r559336612
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/package.scala
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@@ -129,6 +129,7 @@ package object util extends Logging {
case a: Attribute => new PrettyAttribute(a)
case Literal(s: UTF8String, StringType) => PrettyAttribute(s.toString,
StringType)
case Literal(v, t: NumericType) if v != null =>
PrettyAttribute(v.toString, t)
+ case Literal(null, t) => PrettyAttribute("NULL", t)
Review comment:
Let's open a new PR to fix it.
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