Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/14971#discussion_r95977105 --- Diff: sql/hive/src/main/scala/org/apache/spark/sql/hive/client/HiveClientImpl.scala --- @@ -427,7 +473,14 @@ private[hive] class HiveClientImpl( } override def alterTable(tableName: String, table: CatalogTable): Unit = withHiveState { - val hiveTable = toHiveTable(table) + // getTableOption removes all the Hive-specific properties. Here, we fill them back to ensure + // these properties are still available to the others that share the same Hive metastore. + // If users explicitly alter these Hive-specific properties through ALTER TABLE DDL, we respect + // these user-specified values. + val hiveSpecificProps = table.ignoredProperties.filter { + case (key, _) => HiveStatisticsProperties.contains(key) + } + val hiveTable = toHiveTable(table.copy(properties = table.properties ++ hiveSpecificProps)) --- End diff -- `table.properties ++ hiveSpecificProps`, by doing this, we won't respect user-specified Hive-specific properties, which are in `table.properties`.
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