text: // 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.
  
  #include "olap/task/engine_alter_tablet_task.h"
  
  #include "olap/schema_change.h"
  
  namespace doris {
  
  using std::to_string;
  
  EngineAlterTabletTask::EngineAlterTabletTask(const TAlterTabletReqV2& request,
          int64_t signature, const TTaskType::type task_type, vector<string>* error_msgs,
          const string& process_name):
          _alter_tablet_req(request),
          _signature(signature),
          _task_type(task_type),
          _error_msgs(error_msgs),
          _process_name(process_name) { }
  
  OLAPStatus EngineAlterTabletTask::execute() {
      DorisMetrics::instance()->create_rollup_requests_total.increment(1);
  
      SchemaChangeHandler handler;
      OLAPStatus res = handler.process_alter_tablet_v2(_alter_tablet_req);
  
      if (res != OLAP_SUCCESS) {
          LOG(WARNING) << "failed to do alter task. res=" << res
                       << " base_tablet_id=" << _alter_tablet_req.base_tablet_id
                       << ", base_schema_hash=" << _alter_tablet_req.base_schema_hash
                       << ", new_tablet_id=" << _alter_tablet_req.new_tablet_id
                       << ", new_schema_hash=" << _alter_tablet_req.new_schema_hash;
          DorisMetrics::instance()->create_rollup_requests_failed.increment(1);
          return res;
      }
  
      LOG(INFO) << "success to create new alter tablet. res=" << res
                << " base_tablet_id=" << _alter_tablet_req.base_tablet_id
                << ", base_schema_hash" << _alter_tablet_req.base_schema_hash
                << ", new_tablet_id=" << _alter_tablet_req.new_tablet_id
                << ", new_schema_hash=" << _alter_tablet_req.new_schema_hash;
      return res;
  } // execute
  
  } // doris
  