engine_combination_tracker.cc

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#include "sql/engine_combination_tracker.h"
#include <iostream>

bool Engine_combination_tracker::check_engine(const std::string &engine_name,
                                              const std::string &database_name,
                                              const std::string &table_name,
                                              std::string &prev_engine_name,
                                              std::string &prev_database_name,
                                              std::string &prev_table_name) {
  if (std::get<0>(m_known_engine).empty()) {
    m_known_engine = std::make_tuple(engine_name, database_name, table_name);
    return false;
  }
  if (std::get<0>(m_known_engine) == engine_name) return false;

  bool const myisam_and_merge =
      ((engine_name == "MyISAM" &&
        std::get<0>(m_known_engine) == "MRG_MYISAM") ||
       (engine_name == "MRG_MYISAM" &&
        std::get<0>(m_known_engine) == "MyISAM"));
  bool const innodb_and_blackhole =
      ((engine_name == "InnoDB" &&
        std::get<0>(m_known_engine) == "BLACKHOLE") ||
       (engine_name == "BLACKHOLE" && std::get<0>(m_known_engine) == "InnoDB"));

  if (myisam_and_merge || innodb_and_blackhole) return false;

  prev_engine_name = std::get<0>(m_known_engine);
  prev_database_name = std::get<1>(m_known_engine);
  prev_table_name = std::get<2>(m_known_engine);
  return true;
}

void Engine_combination_tracker::clear_known_engine() {
  m_known_engine = std::make_tuple("", "", "");
}

bool Engine_combination_tracker::get_warning_already_emitted() {
  return is_warning_already_emitted;
}

void Engine_combination_tracker::set_warning_already_emitted(bool value) {
  is_warning_already_emitted = value;
}