integration/spark/src/main/scala/org/apache/spark/sql/execution/command/management/CarbonDeleteLoadByLoadDateCommand.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
 *
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * See the License for the specific language governing permissions and
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package org.apache.spark.sql.execution.command.management

import org.apache.spark.sql.{CarbonEnv, Row, SparkSession}
import org.apache.spark.sql.execution.command.{Checker, DataCommand}

import org.apache.carbondata.api.CarbonStore
import org.apache.carbondata.common.exceptions.sql.MalformedCarbonCommandException
import org.apache.carbondata.core.exception.ConcurrentOperationException
import org.apache.carbondata.core.statusmanager.SegmentStatusManager
import org.apache.carbondata.events.{DeleteSegmentByDatePostEvent, DeleteSegmentByDatePreEvent, OperationContext, OperationListenerBus}

case class CarbonDeleteLoadByLoadDateCommand(
    databaseNameOp: Option[String],
    tableName: String,
    dateField: String,
    loadDate: String)
  extends DataCommand {

  override def processData(sparkSession: SparkSession): Seq[Row] = {
    Checker.validateTableExists(databaseNameOp, tableName, sparkSession)
    val carbonTable = CarbonEnv.getCarbonTable(databaseNameOp, tableName)(sparkSession)
    setAuditTable(carbonTable)
    setAuditInfo(Map("date" -> dateField))
    if (!carbonTable.getTableInfo.isTransactionalTable) {
      throw new MalformedCarbonCommandException("Unsupported operation on non transactional table")
    }

    // if insert overwrite in progress, do not allow delete segment
    if (SegmentStatusManager.isOverwriteInProgressInTable(carbonTable)) {
      throw new ConcurrentOperationException(carbonTable, "insert overwrite", "delete segment")
    }

    val operationContext = new OperationContext
    val deleteSegmentByDatePreEvent: DeleteSegmentByDatePreEvent =
      DeleteSegmentByDatePreEvent(carbonTable,
        loadDate,
        sparkSession)
    OperationListenerBus.getInstance.fireEvent(deleteSegmentByDatePreEvent, operationContext)

    CarbonStore.deleteLoadByDate(
      loadDate,
      CarbonEnv.getDatabaseName(databaseNameOp)(sparkSession),
      tableName,
      carbonTable)
    val deleteSegmentPostEvent: DeleteSegmentByDatePostEvent =
      DeleteSegmentByDatePostEvent(carbonTable,
        loadDate,
        sparkSession)
    OperationListenerBus.getInstance.fireEvent(deleteSegmentPostEvent, operationContext)

    Seq.empty
  }

  override protected def opName: String = "DELETE SEGMENT BY DATE"
}