Github user ravipesala commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2482#discussion_r202298843
--- Diff:
integration/spark2/src/main/scala/org/apache/spark/sql/events/AlterTableMergeIndexEventListener.scala
---
@@ -0,0 +1,95 @@
+/*
+ * 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.events
+
+import java.util
+
+import scala.collection.JavaConverters._
+import scala.collection.mutable
+
+import org.apache.spark.internal.Logging
+import org.apache.spark.sql.util.CarbonException
+
+import org.apache.carbondata.common.logging.{LogService, LogServiceFactory}
+import org.apache.carbondata.core.datamap.Segment
+import org.apache.carbondata.core.locks.{CarbonLockFactory, LockUsage}
+import org.apache.carbondata.core.statusmanager.SegmentStatusManager
+import org.apache.carbondata.events.{AlterTableMergeIndexEvent, Event,
OperationContext, OperationEventListener}
+import org.apache.carbondata.processing.merger.CarbonDataMergerUtil
+import org.apache.carbondata.spark.util.CommonUtil
+
+class AlterTableMergeIndexEventListener extends OperationEventListener
with Logging {
--- End diff --
This listener also merge with `MergeIndexEventListener` as another `case `
---
