ericm-db commented on code in PR #47104:
URL: https://github.com/apache/spark/pull/47104#discussion_r1670763037
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sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/TransformWithStateExec.scala:
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@@ -92,6 +93,35 @@ case class TransformWithStateExec(
}
}
+ /**
+ * We initialize this processor handle in the driver to run the init function
+ * and fetch the schemas of the state variables initialized in this
processor.
+ * @return a new instance of the driver processor handle
+ */
+ private def getDriverProcessorHandle: DriverStatefulProcessorHandleImpl = {
+ val driverProcessorHandle = new DriverStatefulProcessorHandleImpl(timeMode)
+ driverProcessorHandle.setHandleState(StatefulProcessorHandleState.PRE_INIT)
+ statefulProcessor.setHandle(driverProcessorHandle)
+ statefulProcessor.init(outputMode, timeMode)
+ driverProcessorHandle
+ }
+
+ /**
+ * Fetching the columnFamilySchemas from the StatefulProcessorHandle
+ * after init is called.
+ */
+ private def getColFamilySchemas(): Map[String, ColumnFamilySchema] = {
+ val driverProcessorHandle = getDriverProcessorHandle
+ val columnFamilySchemas = driverProcessorHandle.getColumnFamilySchemas
+ closeProcessorHandle()
+ columnFamilySchemas
+ }
+
+ private def closeProcessorHandle(): Unit = {
+ statefulProcessor.close()
Review Comment:
This instance won't ever be used again. Will comment.
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