sqlpp11/tests/mysql/usage/Sample.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 "make_test_connection.h"
#include "Tables.h"
#include <sqlpp11/mysql/mysql.h>
#include <sqlpp11/sqlpp11.h>
#include "../../include/test_helpers.h"

#include <cassert>
#include <iostream>
#include <vector>

namespace sql = sqlpp::mysql;
int Sample(int, char*[])
{
  sql::global_library_init();
  try
  {
    auto db = sql::make_test_connection();

    test::createTabSample(db);
    test::createTabFoo(db);

    assert(not db(select(sqlpp::value(false).as(sqlpp::alias::a))).front().a);

    const auto tab = test::TabSample{};
    // clear the table
    db(remove_from(tab).unconditionally());

    // Several ways of ensuring that tab is empty
    assert(not db(select(exists(select(tab.intN).from(tab).unconditionally())))
                   .front()
                   .exists);  // this is probably the fastest
    assert(not db(select(count(tab.intN)).from(tab).unconditionally()).front().count);
    assert(db(select(tab.intN).from(tab).unconditionally()).empty());

    // explicit all_of(tab)
    std::cerr << __FILE__ << ": " << __LINE__ << std::endl;
    select(all_of(tab)).from(tab);
    std::cerr << __FILE__ << ": " << __LINE__ << std::endl;
    db(select(all_of(tab)).from(tab).unconditionally());
    std::cerr << __FILE__ << ": " << __LINE__ << std::endl;
    for (const auto& row : db(select(all_of(tab)).from(tab).unconditionally()))
    {
      std::cerr << __FILE__ << ": " << __LINE__ << std::endl;
      std::cerr << "row.intN: " << row.intN << ", row.textN: " << row.textN << ", row.boolN: " << row.boolN
                << std::endl;
    };
    // insert
    db(insert_into(tab).default_values());
    const auto x = select(all_of(tab)).from(tab).unconditionally();
    const auto y = db.prepare(x);
    for (const auto& row : db(db.prepare(select(all_of(tab)).from(tab).unconditionally())))
    {
      std::cerr << "intN: " << row.intN << std::endl;
      std::cerr << "textN: " << row.textN << std::endl;
      std::cerr << "boolN: " << row.boolN << std::endl;
    }
    db(insert_into(tab).set(tab.textN = "kaesekuchen", tab.boolN = true));
    db(insert_into(tab).default_values());
    db(insert_into(tab).set(tab.textN = "", tab.boolN = true));

    // update
    db(update(tab).set(tab.boolN = false).where(tab.intN.in(sqlpp::value_list(std::vector<int>{1, 2, 3, 4}))));
    db(update(tab).set(tab.boolN = true).where(tab.intN.in(1)));

#warning: Add test with optional insert

    // remove
    {
      db(remove_from(tab).where(tab.intN == tab.intN + 3));

      std::cerr << "+++++++++++++++++++++++++++" << std::endl;
      for (const auto& row : db(select(all_of(tab)).from(tab).unconditionally()))
      {
        std::cerr << __LINE__ << " row.textN: " << row.textN << std::endl;
      }
      std::cerr << "+++++++++++++++++++++++++++" << std::endl;
      decltype(db(select(all_of(tab)).from(tab).unconditionally())) result;
      result = db(select(all_of(tab)).from(tab).unconditionally());
      std::cerr << "Accessing a field directly from the result (using the current row): " << result.begin()->intN
                << std::endl;
      std::cerr << "Can do that again, no problem: " << result.begin()->intN << std::endl;
    }

    // transaction
    {
      auto tx = start_transaction(db);
      auto result = db(select(all_of(tab), select(max(tab.intN)).from(tab)).from(tab).unconditionally());
      if (const auto& row = *result.begin())
      {
        const int64_t a = row.intN.value_or(0);
        const ::sqlpp::optional<long> m = row.max;
        std::cerr << __LINE__ << " row.intN: " << a << ", row.max: " << m << std::endl;
      }
      tx.commit();
    }

    test::TabFoo foo;
    for (const auto& row : db(select(tab.intN).from(tab.join(foo).on(tab.intN == foo.intN)).unconditionally()))
    {
      std::cerr << row.intN << std::endl;
    }

    for (const auto& row :
         db(select(tab.intN).from(tab.left_outer_join(foo).on(tab.intN == foo.intN)).unconditionally()))
    {
      std::cerr << row.intN << std::endl;
    }

    auto ps = db.prepare(select(all_of(tab))
                             .from(tab)
                             .where(tab.intN != parameter(tab.intN) and tab.textN != parameter(tab.textN) and
                                    tab.boolN != parameter(tab.boolN)));
    ps.params.intN = 7;
    ps.params.textN = "wurzelbrunft";
    ps.params.boolN = true;
    for (const auto& row : db(ps))
    {
      std::cerr << "bound result: intN: " << row.intN << std::endl;
      std::cerr << "bound result: textN: " << row.textN << std::endl;
      std::cerr << "bound result: boolN: " << row.boolN << std::endl;
    }

    std::cerr << "--------" << std::endl;
    ps.params.boolN = false;
    for (const auto& row : db(ps))
    {
      std::cerr << "bound result: intN: " << row.intN << std::endl;
      std::cerr << "bound result: textN: " << row.textN << std::endl;
      std::cerr << "bound result: boolN: " << row.boolN << std::endl;
    }

    std::cerr << "--------" << std::endl;
    ps.params.textN = "kaesekuchen";
    for (const auto& row : db(ps))
    {
      std::cerr << "bound result: intN: " << row.intN << std::endl;
      std::cerr << "bound result: textN: " << row.textN << std::endl;
      std::cerr << "bound result: boolN: " << row.boolN << std::endl;
    }

    auto pi = db.prepare(insert_into(tab).set(tab.textN = parameter(tab.textN), tab.boolN = true));
    pi.params.textN = "prepared cake";
    std::cerr << "Inserted: " << db(pi) << std::endl;

    auto pu = db.prepare(update(tab).set(tab.boolN = parameter(tab.boolN)).where(tab.textN == "prepared cake"));
    pu.params.boolN = false;
    std::cerr << "Updated: " << db(pu) << std::endl;

    auto pr = db.prepare(remove_from(tab).where(tab.textN != parameter(tab.textN)));
    pr.params.textN = "prepared cake";
    std::cerr << "Deleted lines: " << db(pr) << std::endl;

    for (const auto& row : db(select(case_when(tab.boolN).then(tab.intN).else_(foo.intN).as(tab.intN))
                                  .from(tab.cross_join(foo))
                                  .unconditionally()))
    {
      std::cerr << row.intN << std::endl;
    }
  }
  catch (const std::exception& e)
  {
    std::cerr << "Exception: " << e.what() << std::endl;
    return 1;
  }
  return 0;
}