Github user ravipesala commented on a diff in the pull request: https://github.com/apache/carbondata/pull/1473#discussion_r149900962 --- Diff: integration/spark-common/src/main/scala/org/apache/carbondata/events/AlterTableEvents.scala --- @@ -0,0 +1,171 @@ +/* + * 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.carbondata.events + +import org.apache.spark.sql.SparkSession +import org.apache.spark.sql.SQLContext +import org.apache.spark.sql.execution.command.{AlterTableDropColumnModel, AlterTableRenameModel} + +import org.apache.carbondata.core.metadata.schema.table.CarbonTable +import org.apache.carbondata.processing.loading.model.CarbonLoadModel + +/** + * + */ +case class AlterTableDropColumnPreEvent(carbonTable: CarbonTable, + alterTableDropColumnModel: AlterTableDropColumnModel, + sparkSession: SparkSession) extends AlterTableDropColumnEvent { + /** + * Method for getting the event type. Used for invoking all listeners registered for an event + * + * @return + */ + override def getEventType: String = { + AlterTableDropColumnPreEvent.eventType + } +} + + +case class AlterTableDropColumnPostEvent(carbonTable: CarbonTable, + alterTableDropColumnModel: AlterTableDropColumnModel, + sparkSession: SparkSession) extends AlterTableDropColumnEvent { + /** + * Method for getting the event type. Used for invoking all listeners registered for an event + * + * @return + */ + override def getEventType: String = { --- End diff -- Remoe the eventType and getEventType from all classes
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