Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/16826#discussion_r102618883
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/internal/SessionState.scala ---
@@ -65,22 +85,120 @@ private[sql] class SessionState(sparkSession:
SparkSession) {
hadoopConf
}
- lazy val experimentalMethods = new ExperimentalMethods
-
/**
- * Internal catalog for managing functions registered by the user.
+ * Get an identical copy of the `SessionState` and associate it with the
given `SparkSession`
*/
- lazy val functionRegistry: FunctionRegistry =
FunctionRegistry.builtin.copy()
+ def clone(sparkSession: SparkSession): SessionState = {
+ val sparkContext = sparkSession.sparkContext
+ val confCopy = conf.clone()
+ val hadoopConfCopy =
SessionState.newHadoopConf(sparkContext.hadoopConfiguration, confCopy)
+ val functionRegistryCopy = functionRegistry.clone()
+ val sqlParser: ParserInterface = new SparkSqlParser(confCopy)
+ val catalogCopy = catalog.clone(confCopy, hadoopConfCopy,
functionRegistryCopy, sqlParser)
+ val queryExecution = (plan: LogicalPlan) => new
QueryExecution(sparkSession, plan)
+
+ sparkContext.getConf.getAll.foreach { case (k, v) =>
+ confCopy.setConfString(k, v)
+ }
+
+ new SessionState(
+ sparkContext,
+ sparkSession.sharedState,
+ confCopy,
+ experimentalMethods.copy,
+ functionRegistryCopy,
+ catalogCopy,
+ sqlParser,
+ SessionState.createAnalyzer(sparkSession, catalogCopy, confCopy),
+ new StreamingQueryManager(sparkSession),
+ queryExecution)
+ }
+
+ // ------------------------------------------------------
+ // Helper methods, partially leftover from pre-2.0 days
+ // ------------------------------------------------------
+
+ def executePlan(plan: LogicalPlan): QueryExecution =
queryExecutionCreator(plan)
+
+ def refreshTable(tableName: String): Unit = {
+ catalog.refreshTable(sqlParser.parseTableIdentifier(tableName))
+ }
+
+ def addJar(path: String): Unit = sharedState.addJar(path)
+
--- End diff --
extra line.
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