Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/18421#discussion_r128166394
--- 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 --
Is that possible the new one is equal to zero?
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