Github user felixcheung commented on a diff in the pull request:
https://github.com/apache/spark/pull/20430#discussion_r164662154
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/command/CommandUtils.scala
---
@@ -34,16 +34,12 @@ object CommandUtils extends Logging {
/** Change statistics after changing data by commands. */
def updateTableStats(sparkSession: SparkSession, table: CatalogTable):
Unit = {
- if (table.stats.nonEmpty) {
+ if (sparkSession.sessionState.conf.autoSizeUpdateEnabled) {
val catalog = sparkSession.sessionState.catalog
- if (sparkSession.sessionState.conf.autoSizeUpdateEnabled) {
- val newTable = catalog.getTableMetadata(table.identifier)
- val newSize =
CommandUtils.calculateTotalSize(sparkSession.sessionState, newTable)
- val newStats = CatalogStatistics(sizeInBytes = newSize)
- catalog.alterTableStats(table.identifier, Some(newStats))
- } else {
- catalog.alterTableStats(table.identifier, None)
--- End diff --
this seems to be a way to clear out the table stats previously. Don't we
need that?
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