sqlpp11/tests/postgresql/usage/Select.cpp

/*
 * Copyright (c) 2013 - 2015, 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 <cassert>
#include <iostream>
#include <vector>

#include <sqlpp11/postgresql/postgresql.h>
#include <sqlpp11/sqlpp11.h>

#include "Tables.h"
#include "make_test_connection.h"
#include "../../include/test_helpers.h"

namespace sql = sqlpp::postgresql;
test::TabFoo tab = {};

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.id: " << row.id << ", row.intN: " << row.intN << ", row.textNnD: " << row.textNnD
              << std::endl;
    assert(i == row.id);
  };
  assert(i == expectedRowCount);

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

int Select(int, char*[])
{
  sql::connection db = sql::make_test_connection();

  test::createTabFoo(db);

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

  // Test size functionality
  const auto test_size = db(select(all_of(tab)).from(tab).unconditionally());
  assert(test_size.size() == 3);

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

  // test boolean value
  db(insert_into(tab).set(tab.boolN = true, tab.textNnD = "asdf"));
  db(insert_into(tab).set(tab.boolN = false, tab.textNnD = "asdfg"));

  assert(db(select(tab.boolN).from(tab).where(tab.textNnD == "asdf")).front().boolN);
  assert(not db(select(tab.boolN).from(tab).where(tab.textNnD == "asdfg")).front().boolN.value());
  assert(not db(select(tab.boolN).from(tab).where(tab.id == 1)).front().boolN.has_value());

  // test

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

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

  auto result1 = db(select(all_of(tab)).from(tab).unconditionally());
  std::cerr << "Accessing a field directly from the result (using the current row): " << result1.begin()->id
            << std::endl;
  std::cerr << "Can do that again, no problem: " << result1.begin()->id << std::endl;

  auto tx = start_transaction(db);
  auto result2 = db(select(all_of(tab), select(max(tab.id)).from(tab)).from(tab).unconditionally());
  if (const auto& row = *result2.begin())
  {
    auto a = row.id;
    auto m = row.max;
    std::cerr << "-----------------------------" << a << ", " << m << std::endl;
  }
  tx.commit();

  return 0;
}