[GitHub] [spark] cloud-fan commented on a change in pull request #24523: [SPARK-27631][SQL] Avoid repeating calculate table statistics

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cloud-fan commented on a change in pull request #24523: [SPARK-27631][SQL] Avoid repeating calculate table statistics
URL: https://github.com/apache/spark/pull/24523#discussion_r284641191
 
 

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 File path: sql/core/src/main/scala/org/apache/spark/sql/execution/command/CommandUtils.scala
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 @@ -43,13 +43,17 @@ object CommandUtils extends Logging {
   /** Change statistics after changing data by commands. */
   def updateTableStats(sparkSession: SparkSession, table: CatalogTable): Unit = {
     val catalog = sparkSession.sessionState.catalog
-    if (sparkSession.sessionState.conf.autoSizeUpdateEnabled) {
-      val newTable = catalog.getTableMetadata(table.identifier)
-      val newSize = CommandUtils.calculateTotalSize(sparkSession, newTable)
-      val newStats = CatalogStatistics(sizeInBytes = newSize)
-      catalog.alterTableStats(table.identifier, Some(newStats))
-    } else if (table.stats.nonEmpty) {
-      catalog.alterTableStats(table.identifier, None)
+    val statsMaybeUpdatedByHive = catalog.getTableMetadata(table.identifier)
 
 Review comment:
   +1 , I think it's nothing about hive. It's just, we shouldn't call `alterTableStats` if the stats is not changed.

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