Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/15099#discussion_r79299637 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/internal/CatalogImpl.scala --- @@ -284,8 +284,12 @@ class CatalogImpl(sparkSession: SparkSession) extends Catalog { * @since 2.0.0 */ override def dropTempView(viewName: String): Unit = { - sparkSession.sharedState.cacheManager.uncacheQuery(sparkSession.table(viewName)) - sessionCatalog.dropTable(TableIdentifier(viewName), ignoreIfNotExists = true, purge = false) + val maybeTempView = sparkSession.sessionState.catalog.getTempView(viewName) + if (maybeTempView.isDefined) { + val view = SubqueryAlias(viewName, maybeTempView.get, Some(TableIdentifier(viewName))) --- End diff -- you are right, the `CacheManager` search the key by `sameResult`, so the subquery is useless
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