Github user mbasmanova commented on a diff in the pull request: https://github.com/apache/spark/pull/18421#discussion_r130402344 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/command/CommandUtils.scala --- @@ -112,4 +112,29 @@ object CommandUtils extends Logging { size } + def compareAndGetNewStats( + oldStats: Option[CatalogStatistics], + newTotalSize: BigInt, + newRowCount: Option[BigInt]): Option[CatalogStatistics] = { + val oldTotalSize = oldStats.map(_.sizeInBytes.toLong).getOrElse(0L) + val oldRowCount = oldStats.flatMap(_.rowCount.map(_.toLong)).getOrElse(-1L) + var newStats: Option[CatalogStatistics] = None + if (newTotalSize > 0 && newTotalSize != oldTotalSize) { --- End diff -- Indeed. I fixed this to use -1 and >=0.
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