catalog/CatalogRelationStatistics.cpp

/**
 * 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 "catalog/CatalogRelationStatistics.hpp"

#include "catalog/Catalog.pb.h"

namespace quickstep {

CatalogRelationStatistics::CatalogRelationStatistics(
    const serialization::CatalogRelationStatistics &proto) {
  if (proto.has_num_tuples()) {
    num_tuples_ = proto.num_tuples();
  }
  for (int i = 0; i < proto.num_distinct_values_map_size(); ++i) {
    const auto &entry = proto.num_distinct_values_map(i);
    num_distinct_values_map_.emplace(entry.attr_id(),
                                     entry.num_distinct_values());
  }
}

serialization::CatalogRelationStatistics CatalogRelationStatistics::getProto() const {
  serialization::CatalogRelationStatistics proto;
  if (num_tuples_ != 0) {
    proto.set_num_tuples(num_tuples_);
  }
  for (const auto &pair : num_distinct_values_map_) {
    auto entry = proto.add_num_distinct_values_map();
    entry->set_attr_id(pair.first);
    entry->set_num_distinct_values(pair.second);
  }
  return proto;
}

}  // namespace quickstep