Github user ravipesala commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/1488#discussion_r150380951
--- Diff:
integration/spark2/src/main/scala/org/apache/spark/sql/execution/command/preaaggregate/listeners/PreAggregateDataTypeChangePreListener.scala
---
@@ -0,0 +1,55 @@
+/*
+ * 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.preaaggregate.listeners
+
+import scala.collection.JavaConverters._
+
+import org.apache.carbondata.events.{AlterTableDataTypeChangePreEvent,
Event, OperationContext, OperationEventListener}
+
+object PreAggregateDataTypeChangePreListener extends
OperationEventListener {
+ /**
+ * Called on a specified event occurrence
+ *
+ * @param event
+ * @param operationContext
+ */
+ override def onEvent(event: Event, operationContext: OperationContext):
Unit = {
+ val dataTypeChangePreListener =
event.asInstanceOf[AlterTableDataTypeChangePreEvent]
+ val carbonTable = dataTypeChangePreListener.carbonTable
+ val alterTableDataTypeChangeModel =
dataTypeChangePreListener.alterTableDataTypeChangeModel
+ val columnToBeAltered: String =
alterTableDataTypeChangeModel.columnName
+ val dataMapSchemas = carbonTable.getTableInfo.getDataMapSchemaList
+ if (dataMapSchemas != null && !dataMapSchemas.isEmpty) {
+ dataMapSchemas.asScala.foreach {
+ dataMapSchema =>
--- End diff --
move to above line
---
