[GitHub] [carbondata] Indhumathi27 commented on a change in pull request #3179: [CARBONDATA-3338] Support Incremental DataLoad for MV Datamap[with single parent table]

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Indhumathi27 commented on a change in pull request #3179: [CARBONDATA-3338] Support Incremental DataLoad for MV Datamap[with single parent table]
URL: https://github.com/apache/carbondata/pull/3179#discussion_r279189891
 
 

 ##########
 File path: integration/spark2/src/main/scala/org/apache/spark/sql/execution/command/mv/MVListeners.scala
 ##########
 @@ -0,0 +1,140 @@
+/*
+* Licensed to the Apache Software Foundation (ASF) under one or more
+* contributor license agreements.  See the NOTICE file distributed with
+* this work for additional information regarding copyright ownership.
+* The ASF licenses this file to You under the Apache License, Version 2.0
+* (the "License"); you may not use this file except in compliance with
+* the License.  You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+package org.apache.spark.sql.execution.command.mv
+
+import scala.collection.JavaConverters._
+
+import org.apache.spark.sql.SparkSession
+import org.apache.spark.sql.execution.command.AlterTableModel
+import org.apache.spark.sql.execution.command.management.CarbonAlterTableCompactionCommand
+
+import org.apache.carbondata.core.datamap.DataMapStoreManager
+import org.apache.carbondata.core.datamap.status.DataMapStatusManager
+import org.apache.carbondata.core.metadata.schema.datamap.DataMapClassProvider.MV
+import org.apache.carbondata.core.metadata.schema.table.CarbonTable
+import org.apache.carbondata.datamap.DataMapManager
+import org.apache.carbondata.events.{AlterTableCompactionPreStatusUpdateEvent, DeleteFromTablePostEvent, Event, OperationContext, OperationEventListener, UpdateTablePostEvent}
+import org.apache.carbondata.processing.loading.events.LoadEvents.LoadTablePostExecutionEvent
+import org.apache.carbondata.processing.merger.CompactionType
+
+/**
+ * Listener to trigger compaction on mv datamap after main table compaction
+ */
+object AlterMVtableCompactionPostListener extends OperationEventListener {
+  /**
+   * Called on a specified event occurrence
+   *
+   * @param event
+   * @param operationContext
+   */
+  override def onEvent(event: Event, operationContext: OperationContext): Unit = {
+    val compactionEvent = event.asInstanceOf[AlterTableCompactionPreStatusUpdateEvent]
+    val carbonTable = compactionEvent.carbonTable
+    val compactionType = compactionEvent.carbonMergerMapping.campactionType
+    if (compactionType == CompactionType.CUSTOM) {
+      return
+    }
+    val carbonLoadModel = compactionEvent.carbonLoadModel
+    val sparkSession = compactionEvent.sparkSession
+    if (CarbonTable.hasMVDataMap(carbonTable)) {
+      val allDataMapSchemas = DataMapStoreManager.getInstance
+        .getDataMapSchemasOfTable(carbonTable).asScala
+        .filter(dataMapSchema => dataMapSchema.getProviderName.equalsIgnoreCase(MV.toString))
+      allDataMapSchemas.foreach { dataMapSchema =>
+          val childRelationIdentifier = dataMapSchema.getRelationIdentifier
+          val alterTableModel = AlterTableModel(Some(childRelationIdentifier.getDatabaseName),
+            childRelationIdentifier.getTableName,
+            None,
+            compactionType.toString,
+            Some(System.currentTimeMillis()),
+            "")
+          operationContext.setProperty(
+            dataMapSchema.getRelationIdentifier.getDatabaseName + "_" +
+            dataMapSchema.getRelationIdentifier.getTableName + "_Segment",
+            carbonLoadModel.getSegmentId)
+          CarbonAlterTableCompactionCommand(alterTableModel, operationContext = operationContext)
+            .run(sparkSession)
+      }
+    }
+  }
+}
+
+/**
+ * Listener to trigger data load on mv datamap after main table data load
+ */
+object LoadPostMVListener extends OperationEventListener {
+  /**
+   * Called on a specified event occurrence
+   *
+   * @param event
+   * @param operationContext
+   */
+  override def onEvent(event: Event, operationContext: OperationContext): Unit = {
+    val sparkSession = SparkSession.getActiveSession.get
+    val carbonTable: CarbonTable =
+      event match {
+        case event: LoadTablePostExecutionEvent =>
+          val carbonLoadModelOption = Some(event.getCarbonLoadModel)
+          if (carbonLoadModelOption.isDefined) {
+            val carbonLoadModel = carbonLoadModelOption.get
+            carbonLoadModel.getCarbonDataLoadSchema.getCarbonTable
+          } else {
+            null
+          }
+        case event: UpdateTablePostEvent =>
+          val table = Some(event.carbonTable)
+          if (table.isDefined) {
+            table.get
+          } else {
+            null
+          }
+        case event: DeleteFromTablePostEvent =>
+          val table = Some(event.carbonTable)
+          if (table.isDefined) {
+            table.get
+          } else {
+            null
+          }
+        case _ => null
+      }
+    if (null != carbonTable && CarbonTable.hasMVDataMap(carbonTable)) {
+      val allDataMapSchemas = DataMapStoreManager.getInstance
+        .getDataMapSchemasOfTable(carbonTable).asScala
+        .filter(dataMapSchema => dataMapSchema.getProviderName.equalsIgnoreCase(MV.toString))
+      allDataMapSchemas.foreach { dataMapSchema =>
+        if (!dataMapSchema.isLazy) {
+          val dataMapTable = CarbonTable
+            .buildFromTablePath(dataMapSchema.getRelationIdentifier.getTableName,
+              dataMapSchema.getRelationIdentifier.getDatabaseName,
+              dataMapSchema.getRelationIdentifier.getTablePath,
+              dataMapSchema.getRelationIdentifier.getTableId)
+          val provider = DataMapManager.get()
+            .getDataMapProvider(dataMapTable, dataMapSchema, sparkSession)
+          try {
+            provider.rebuild()
 
 Review comment:
   done

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