Github user srowen commented on a diff in the pull request: https://github.com/apache/spark/pull/13720#discussion_r67811340 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/interface.scala --- @@ -180,7 +180,8 @@ case class CatalogTable( Seq(s"Table: ${identifier.quotedString}", if (owner.nonEmpty) s"Owner: $owner" else "", s"Created: ${new Date(createTime).toString}", - s"Last Access: ${new Date(lastAccessTime).toString}", + "Last Access: " + + (if (lastAccessTime == -1) "UNKNOWN" else new Date(lastAccessTime).toString), --- End diff -- I don't feel strongly about it, but seems like elsewhere an empty string is used for no values. This seems slightly preferable.
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