Github user wzhfy commented on a diff in the pull request:

    https://github.com/apache/spark/pull/18334#discussion_r124977456
  
    --- Diff: 
sql/core/src/main/scala/org/apache/spark/sql/execution/command/ddl.scala ---
    @@ -437,7 +437,20 @@ case class AlterTableAddPartitionCommand(
         }
         catalog.createPartitions(table.identifier, parts, ignoreIfExists = 
ifNotExists)
     
    -    CommandUtils.updateTableStats(sparkSession, table)
    +    if (table.stats.nonEmpty) {
    +      if (sparkSession.sessionState.conf.autoUpdateSize) {
    +        val addedSize = parts.map { part =>
    +          CommandUtils.calculateLocationSize(sparkSession.sessionState, 
table.identifier,
    --- End diff --
    
    OK, shall we log in info level or debug level?


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