sqlpp11/tests/sqlite3/usage/Transaction.cpp

/*
 * Copyright (c) 2013 - 2016, Roland Bock
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 *  * Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "TabSample.h"
#include <cassert>
#include <sqlpp11/alias_provider.h>
#include <sqlpp11/custom_query.h>
#include <sqlpp11/functions.h>
#include <sqlpp11/insert.h>
#include <sqlpp11/remove.h>
#include <sqlpp11/select.h>
#include <sqlpp11/sqlite3/connection.h>
#include <sqlpp11/transaction.h>
#include <sqlpp11/update.h>

#ifdef SQLPP_USE_SQLCIPHER
#include <sqlcipher/sqlite3.h>
#else
#include <sqlite3.h>
#endif
#include <iostream>
#include <vector>

namespace sql = sqlpp::sqlite3;

SQLPP_ALIAS_PROVIDER(pragma)

int Transaction(int, char*[])
{
  sql::connection db({":memory:", SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, "", true});

  std::cerr << "--------------------------------------" << std::endl;

  auto current_level = db.get_default_isolation_level();
  std::cout << "Expecting default isolation level = 1, is " << static_cast<int>(current_level) << std::endl;
  assert(current_level == sqlpp::isolation_level::serializable);

  int pragmaValue = db(custom_query(sqlpp::verbatim("PRAGMA read_uncommitted"))
                           .with_result_type_of(select(sqlpp::value(1).as(pragma))))
                        .front()
                        .pragma;
  assert(pragmaValue == 0);

  std::cerr << "Expecting read_uncommitted = 0, is: " << pragmaValue << std::endl;
  db.set_default_isolation_level(sqlpp::isolation_level::read_uncommitted);
  auto tx = start_transaction(db);
  pragmaValue = db(custom_query(sqlpp::verbatim("PRAGMA read_uncommitted"))
                       .with_result_type_of(select(sqlpp::value(1).as(pragma))))
                    .front()
                    .pragma;
  std::cerr << "Now expecting read_uncommitted = 1, is: " << pragmaValue << std::endl;
  assert(pragmaValue == 1);

  current_level = db.get_default_isolation_level();
  std::cout << "Now expecting default isolation level = 4, is " << static_cast<int>(current_level) << std::endl;
  assert(current_level == sqlpp::isolation_level::read_uncommitted);

  tx.commit();
  std::cerr << "--------------------------------------" << std::endl;

  return 0;
}