dongjoon-hyun commented on a change in pull request #24047: [SPARK-25196][SQL] Extends Analyze commands for cached tables URL: https://github.com/apache/spark/pull/24047#discussion_r266277611
########## File path: sql/core/src/main/scala/org/apache/spark/sql/execution/CacheManager.scala ########## @@ -154,6 +155,22 @@ class CacheManager extends Logging { } } + // Analyzes column statistics in the given cache data + private[sql] def analyzeColumnCacheQuery( + sparkSession: SparkSession, + cachedData: CachedData, + column: Seq[Attribute]): Unit = { + val relation = cachedData.cachedRepresentation + val (rowCount, newColStats) = + CommandUtils.computeColumnStats(sparkSession, relation, column) + val oldStats = relation.statsOfPlanToCache + val newStats = oldStats.copy( + rowCount = Some(rowCount), + attributeStats = AttributeMap((oldStats.attributeStats ++ newColStats).toSeq) + ) + relation.statsOfPlanToCache = newStats Review comment: This function is able to ignore that assumption because this only updates `relation.statsOfPlanToCache` instead of `cachedData` itself? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org