[CARBONDATA-2335] Fix auto handoff for preaggregate table with streaming

integration/spark-common/src/main/scala/org/apache/carbondata/streaming/StreamSinkFactory.scala

@@ -38,7 +38,7 @@ import org.apache.carbondata.core.metadata.schema.table.CarbonTable
 import org.apache.carbondata.core.util.CarbonProperties
 import org.apache.carbondata.core.util.path.CarbonTablePath
 import org.apache.carbondata.events.{OperationContext, OperationListenerBus}
-import org.apache.carbondata.processing.loading.events.LoadEvents.{LoadTablePostExecutionEvent, LoadTablePreExecutionEvent}
+import org.apache.carbondata.processing.loading.events.LoadEvents.{LoadMetadataEvent, LoadTablePostExecutionEvent, LoadTablePreExecutionEvent, LoadTablePreStatusUpdateEvent}
 import org.apache.carbondata.processing.loading.model.{CarbonLoadModel, CarbonLoadModelBuilder, LoadOption}
 import org.apache.carbondata.spark.dictionary.provider.SecureDictionaryServiceProvider
 import org.apache.carbondata.spark.dictionary.server.SecureDictionaryServer
@@ -110,6 +110,9 @@ object StreamSinkFactory {
     val segmentId = getStreamSegmentId(carbonTable)
     carbonLoadModel.setSegmentId(segmentId)
 
+    // Used to generate load commands for child tables in case auto-handoff is fired.
+    val loadMetaEvent = new LoadMetadataEvent(carbonTable, false)
+    OperationListenerBus.getInstance().fireEvent(loadMetaEvent, operationContext)
     // start server if necessary
     val server = startDictionaryServer(
       sparkSession,
@@ -120,14 +123,16 @@ object StreamSinkFactory {
     } else {
       carbonLoadModel.setUseOnePass(false)
     }
+
     // default is carbon appended stream sink
     val carbonAppendableStreamSink = new CarbonAppendableStreamSink(
       sparkSession,
       carbonTable,
       segmentId,
       parameters,
       carbonLoadModel,
-      server)
+      server,
+      operationContext)
 
     // fire post event before streamin is started
     val loadTablePostExecutionEvent = new LoadTablePostExecutionEvent(

integration/spark-common/src/main/scala/org/apache/spark/sql/execution/streaming/CarbonAppendableStreamSink.scala

@@ -62,7 +62,8 @@ class CarbonAppendableStreamSink(
     var currentSegmentId: String,
     parameters: Map[String, String],
     carbonLoadModel: CarbonLoadModel,
-    server: Option[DictionaryServer]) extends Sink {
+    server: Option[DictionaryServer],
+    operationContext: OperationContext) extends Sink {
 
   private val fileLogPath = CarbonTablePath.getStreamingLogDir(carbonTable.getTablePath)
   private val fileLog = new FileStreamSinkLog(FileStreamSinkLog.VERSION, sparkSession, fileLogPath)
@@ -110,16 +111,14 @@ class CarbonAppendableStreamSink(
 
       // fire pre event on every batch add
       // in case of streaming options and optionsFinal can be same
-      val operationContext = new OperationContext
       val loadTablePreExecutionEvent = new LoadTablePreExecutionEvent(
         carbonTable.getCarbonTableIdentifier,
         carbonLoadModel,
         carbonLoadModel.getFactFilePath,
         false,
         parameters.asJava,
         parameters.asJava,
-        false
-      )
+        false)
       OperationListenerBus.getInstance().fireEvent(loadTablePreExecutionEvent, operationContext)
       checkOrHandOffSegment()
 
@@ -180,7 +179,7 @@ class CarbonAppendableStreamSink(
         if (enableAutoHandoff) {
           StreamHandoffRDD.startStreamingHandoffThread(
             carbonLoadModel,
-            new OperationContext,
+            operationContext,
             sparkSession,
             false)
         }

integration/spark2/src/test/scala/org/apache/spark/carbondata/TestStreamingTableOperation.scala

@@ -179,7 +179,7 @@ class TestStreamingTableOperation extends QueryTest with BeforeAndAfterAll {
     assertResult("Alter table change datatype is not allowed for streaming table")(changeDataTypeException.getMessage)
   }
 
-  override def afterAll {
+  override def  afterAll {
     dropTable()
     sql("USE default")
     sql("DROP DATABASE IF EXISTS streaming CASCADE")
@@ -1454,6 +1454,35 @@ class TestStreamingTableOperation extends QueryTest with BeforeAndAfterAll {
     )
   }
 
+  test("test autohandoff with preaggregate tables") {
+    sql("drop table if exists maintable")
+    createTable(tableName = "maintable", streaming = true, withBatchLoad = false)
+    sql("create datamap p1 on table maintable using 'preaggregate' as select name, sum(id) from maintable group by name")
+    executeStreamingIngest(
+      tableName = "maintable",
+      batchNums = 2,
+      rowNumsEachBatch = 100,
+      intervalOfSource = 5,
+      intervalOfIngest = 5,
+      continueSeconds = 20,
+      generateBadRecords = false,
+      badRecordAction = "force",
+      handoffSize = 1L,
+      autoHandoff = false)
+    executeStreamingIngest(
+      tableName = "maintable",
+      batchNums = 2,
+      rowNumsEachBatch = 100,
+      intervalOfSource = 5,
+      intervalOfIngest = 5,
+      continueSeconds = 20,
+      generateBadRecords = false,
+      badRecordAction = "force",
+      handoffSize = 1L,
+      autoHandoff = true)
+    checkAnswer(sql("select count(*) from maintable_p1"), Seq(Row(200)))
+  }
+
   test("block drop streaming table while streaming is in progress") {
     val identifier = new TableIdentifier("stream_table_drop", Option("streaming"))
     val carbonTable = CarbonEnv.getInstance(spark).carbonMetastore.lookupRelation(identifier)(spark)