integration/spark/src/main/scala/org/apache/spark/sql/execution/command/mutation/CarbonTruncateCommand.scala

/*
 * 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.
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package org.apache.spark.sql.execution.command.mutation

import org.apache.spark.sql.{CarbonEnv, Row, SparkSession}
import org.apache.spark.sql.catalyst.analysis.NoSuchTableException
import org.apache.spark.sql.execution.command.{DataCommand, TruncateTableCommand}
import org.apache.spark.sql.execution.command.management.CarbonCleanFilesCommand
import org.apache.spark.sql.hive.CarbonRelation

import org.apache.carbondata.common.exceptions.sql.MalformedCarbonCommandException
import org.apache.carbondata.common.logging.LogServiceFactory

case class CarbonTruncateCommand(child: TruncateTableCommand) extends DataCommand {
  override def processData(sparkSession: SparkSession): Seq[Row] = {
    val LOGGER = LogServiceFactory.getLogService(this.getClass.getCanonicalName)
    val dbName = CarbonEnv.getDatabaseName(child.tableName.database)(sparkSession)
    val tableName = child.tableName.table
    setAuditTable(dbName, tableName)
    val relation = CarbonEnv.getInstance(sparkSession).carbonMetaStore
      .lookupRelation(Option(dbName), tableName)(sparkSession).asInstanceOf[CarbonRelation]
    if (relation == null) {
      throw new NoSuchTableException(dbName, tableName)
    }
    if (null == relation.carbonTable) {
      LOGGER.error(s"Truncate table failed. table not found: $dbName.$child.tableName.table")
      throw new NoSuchTableException(dbName, child.tableName.table)
    }
    if (child.partitionSpec.isDefined) {
      throw new MalformedCarbonCommandException(
        "Unsupported truncate table with specified partition")
    }
    CarbonCleanFilesCommand(
      databaseNameOp = Option(dbName),
      tableName = Option(tableName),
      truncateTable = true
    ).run(sparkSession)
  }

  override protected def opName = "TRUNCATE TABLE"
}