Github user kunalkhamar commented on a diff in the pull request: https://github.com/apache/spark/pull/16826#discussion_r102779157 --- Diff: sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveSessionCatalog.scala --- @@ -77,10 +71,44 @@ private[sql] class HiveSessionCatalog( metastoreCatalog.hiveDefaultTableFilePath(name) } + /** + * Get an identical copy of the `SessionCatalog`. + * The temporary tables and function registry are retained. + * The table relation cache will not be populated. + * @note `externalCatalog` and `globalTempViewManager` are from shared state, don't need deep copy + * `FunctionResourceLoader` is effectively stateless, also does not need deep copy. + * All arguments passed in should be associated with `sparkSession`. + * This should ideally override `SessionCatalog.copy` but does not at present, since + * `HiveMetastoreCatalog` is dependent on `SparkSession`. + */ + def clone( --- End diff -- This should ideally override `SessionCatalog.clone` but does not at present, since `HiveMetastoreCatalog` is dependent on `SparkSession`.
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