anishshri-db commented on code in PR #47104:
URL: https://github.com/apache/spark/pull/47104#discussion_r1664958663
##########
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/StatefulProcessorHandleImpl.scala:
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@@ -313,3 +290,174 @@ class StatefulProcessorHandleImpl(
}
}
}
+
+/**
+ * This DriverStatefulProcessorHandleImpl is used within TransformWithExec
+ * on the driver side to collect the columnFamilySchemas before any processing
is
+ * actually done. We need this class because we can only collect the schemas
after
+ * the StatefulProcessor is initialized.
+ */
+class DriverStatefulProcessorHandleImpl(timeMode: TimeMode)
+ extends StatefulProcessorHandleImplBase(timeMode) {
+
+ private[sql] val columnFamilySchemaUtils = ColumnFamilySchemaUtilsV1
+
+ private[sql] val columnFamilySchemas: mutable.Map[String,
ColumnFamilySchema] =
Review Comment:
can we add a comment to explain why this is thread-safe ?
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