Github user ravipesala commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/1489#discussion_r150513579
--- Diff:
integration/spark2/src/main/scala/org/apache/spark/sql/execution/command/datamap/DataMapListeners.scala
---
@@ -0,0 +1,71 @@
+/*
+ * 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.datamap
+
+import scala.collection.JavaConverters._
+
+import org.apache.spark.sql.execution.command.CarbonDropTableCommand
+
+import org.apache.carbondata.core.metadata.schema.table.DataMapSchema
+import org.apache.carbondata.events.{DropDataMapPostEvent,
DropTablePostEvent, Event, OperationContext, OperationEventListener}
+
+object DataMapDropTablePostListener extends OperationEventListener {
+
+ /**
+ * Called on a specified event occurrence
+ *
+ * @param event
+ */
+ override def onEvent(event: Event, operationContext: OperationContext):
Unit = {
+ val dropPostEvent = event.asInstanceOf[DropTablePostEvent]
+ val carbonTable = dropPostEvent.carbonTable
+ val sparkSession = dropPostEvent.sparkSession
+ if (carbonTable.isDefined &&
carbonTable.get.getTableInfo.getDataMapSchemaList != null &&
+ !carbonTable.get.getTableInfo.getDataMapSchemaList.isEmpty) {
+ val childSchemas = carbonTable.get.getTableInfo.getDataMapSchemaList
+ for (childSchema: DataMapSchema <- childSchemas.asScala) {
+ if (childSchema.getRelationIdentifier != null) {
+ CarbonDropTableCommand(ifExistsSet = true,
--- End diff --
ok
---
