sqlpp11/tests/mysql/usage/Select.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 "TabSample.h"
#include <cassert>
#include <sqlpp11/alias_provider.h>
#include <sqlpp11/functions.h>
#include <sqlpp11/insert.h>
#include <sqlpp11/mysql/connection.h>
#include <sqlpp11/remove.h>
#include <sqlpp11/select.h>
#include <sqlpp11/transaction.h>
#include <sqlpp11/update.h>

#include <iostream>
#include <vector>

const auto library_raii = sqlpp::mysql::scoped_library_initializer_t{0, nullptr, nullptr};

namespace sql = sqlpp::mysql;
const auto tab = TabSample{};

void testSelectAll(sql::connection& db, int expectedRowCount)
{
  std::cerr << "--------------------------------------" << std::endl;
  int i = 0;
  for (const auto& row : db(sqlpp::select(all_of(tab)).from(tab).unconditionally()))
  {
    ++i;
    std::cerr << ">>> row.alpha: " << row.alpha << ", row.beta: " << row.beta << ", row.gamma: " << row.gamma
              << std::endl;
    assert(i == row.alpha);
  };
  assert(i == expectedRowCount);

  auto preparedSelectAll = db.prepare(sqlpp::select(all_of(tab)).from(tab).unconditionally());
  std::cerr << "--------------------------------------" << std::endl;
  i = 0;
  for (const auto& row : db(preparedSelectAll))
  {
    ++i;
    std::cerr << ">>> row.alpha: " << row.alpha << ", row.beta: " << row.beta << ", row.gamma: " << row.gamma
              << std::endl;
    assert(i == row.alpha);
  };
  assert(i == expectedRowCount);

  // Try running the same prepared statement again
  std::cerr << "--------------------------------------" << std::endl;
  i = 0;
  for (const auto& row : db(preparedSelectAll))
  {
    ++i;
    std::cerr << ">>> row.alpha: " << row.alpha << ", row.beta: " << row.beta << ", row.gamma: " << row.gamma
              << std::endl;
    assert(i == row.alpha);
  };
  assert(i == expectedRowCount);
  std::cerr << "--------------------------------------" << std::endl;
}

int Select(int, char*[])
{
  try
  {
    auto db = sql::make_test_connection();
    db.execute(R"(DROP TABLE IF EXISTS tab_sample)");
    db.execute(R"(CREATE TABLE tab_sample (
		alpha bigint(20) AUTO_INCREMENT,
			beta varchar(255) DEFAULT NULL,
			gamma bool DEFAULT NULL,
			PRIMARY KEY (alpha)
			))");
    db.execute(R"(DROP TABLE IF EXISTS tab_foo)");
    db.execute(R"(CREATE TABLE tab_foo (
		omega bigint(20) DEFAULT NULL
			))");

    testSelectAll(db, 0);
    db(insert_into(tab).default_values());
    testSelectAll(db, 1);
    db(insert_into(tab).set(tab.gamma = true, tab.beta = "cheesecake"));
    testSelectAll(db, 2);
    db(insert_into(tab).set(tab.gamma = true, tab.beta = "cheesecake"));
    testSelectAll(db, 3);

    // test functions and operators
    db(select(all_of(tab)).from(tab).where(tab.alpha.is_null()));
    db(select(all_of(tab)).from(tab).where(tab.alpha.is_not_null()));
    db(select(all_of(tab)).from(tab).where(tab.alpha.in(1, 2, 3)));
    db(select(all_of(tab)).from(tab).where(tab.alpha.in(sqlpp::value_list(std::vector<int>{1, 2, 3, 4}))));
    db(select(all_of(tab)).from(tab).where(tab.alpha.not_in(1, 2, 3)));
    db(select(all_of(tab)).from(tab).where(tab.alpha.not_in(sqlpp::value_list(std::vector<int>{1, 2, 3, 4}))));
    db(select(count(tab.alpha)).from(tab).unconditionally());
    db(select(avg(tab.alpha)).from(tab).unconditionally());
    db(select(max(tab.alpha)).from(tab).unconditionally());
    db(select(min(tab.alpha)).from(tab).unconditionally());
    db(select(exists(select(tab.alpha).from(tab).where(tab.alpha > 7))).from(tab).unconditionally());
    db(select(all_of(tab)).from(tab).where(tab.alpha == any(select(tab.alpha).from(tab).where(tab.alpha < 3))));
    db(select(all_of(tab)).from(tab).where(tab.alpha == some(select(tab.alpha).from(tab).where(tab.alpha < 3))));

    db(select(all_of(tab)).from(tab).where(tab.alpha + tab.alpha > 3));
    db(select(all_of(tab)).from(tab).where((tab.beta + tab.beta) == ""));
    db(select(all_of(tab)).from(tab).where((tab.beta + tab.beta).like("%'\"%")));

    // insert
    db(insert_into(tab).set(tab.gamma = true));

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

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

    auto result = db(select(all_of(tab)).from(tab).unconditionally());
    std::cerr << "Accessing a field directly from the result (using the current row): " << result.begin()->alpha
              << std::endl;
    std::cerr << "Can do that again, no problem: " << result.begin()->alpha << std::endl;
    }

    // transaction
    {
      auto tx = start_transaction(db);
      auto result = db(select(all_of(tab), select(max(tab.alpha)).from(tab)).from(tab).unconditionally());
      if (const auto& row = *result.begin())
      {
        long a = row.alpha;
        long m = row.max;
        std::cerr << "-----------------------------" << a << ", " << m << std::endl;
      }
      tx.commit();
    }
  }
  catch (const std::exception& e)
  {
    std::cerr << "Exception: " << e.what() << std::endl;
    return 1;
  }
  return 0;
}