sqlpp11/tests/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 <iostream>
#include "Sample.h"
#include "MockDb.h"
#include "is_regular.h"
#include <sqlpp11/alias_provider.h>
#include <sqlpp11/select.h>
#include <sqlpp11/functions.h>
#include <sqlpp11/connection.h>

template <typename Db, typename Column>
int64_t getColumn(Db&& db, const Column& column)
{
  auto result = db(select(column.as(sqlpp::alias::a)).from(column.table()).where(true));
  if (not result.empty())
    return result.front().a;
  else
    return 0;
}

int Select(int, char**)
{
  MockDb db = {};
  MockDb::_serializer_context_t printer;

  test::TabFoo f;
  test::TabBar t;
  const auto tab_a = f.as(sqlpp::alias::a);

  getColumn(db, t.alpha);
  select(count(t.alpha));

  for (const auto& row : db(select(sqlpp::value(false).as(sqlpp::alias::a))))
  {
    std::cout << row.a << std::endl;
  }

  for (const auto& row : db(select(all_of(t)).from(t).where(true)))
  {
    int64_t a = row.alpha;
    const std::string b = row.beta;
    std::cout << a << ", " << b << std::endl;
  }

  for (const auto& row : db(select(all_of(t).as(t)).from(t).where(true)))
  {
    int64_t a = row.tabBar.alpha;
    const std::string b = row.tabBar.beta;
    std::cout << a << ", " << b << std::endl;
  }

  for (const auto& row : db(select(all_of(t).as(t), t.gamma).from(t).where(t.alpha > 7)))
  {
    int64_t a = row.tabBar.alpha;
    const std::string b = row.tabBar.beta;
    const bool g = row.gamma;
    std::cout << a << ", " << b << ", " << g << std::endl;
  }

  for (const auto& row :
       db(select(all_of(t), all_of(f)).from(t.join(f).on(t.alpha > f.omega and not t.gamma)).where(true)))
  {
    std::cout << row.alpha << std::endl;
  }

  for (const auto& row : db(select(all_of(t), all_of(f))
                                .from(t.join(f).on(t.alpha > f.omega).join(tab_a).on(t.alpha == tab_a.omega))
                                .where(true)))
  {
    std::cout << row.alpha << std::endl;
  }

  for (const auto& row : db(select(count(t.alpha), avg(t.alpha)).from(t).where(true)))
  {
    std::cout << row.count << std::endl;
  }

  for (const auto& row : db(select(count(t.alpha), avg(t.alpha)).from(t).where(t.alpha == sqlpp::tvin(0))))
  {
    std::cout << row.count << std::endl;
  }

  auto stat = sqlpp::select()
                  .columns(all_of(t))
                  .flags(sqlpp::all)
                  .from(t)
                  .extra_tables(f, t)
                  .where(t.alpha > 0)
                  .group_by(t.alpha)
                  .order_by(t.gamma.asc())
                  .having(t.gamma)
                  .limit(7)
                  .offset(19);
  printer.reset();
  std::cerr << serialize(stat, printer).str() << std::endl;

  auto s0 = dynamic_select(db)
                .columns(all_of(t))
                .flags(sqlpp::all)
                .from(t)
                .extra_tables(f, t)
                .where(t.alpha > 0)
                .group_by(t.alpha)
                .order_by(t.gamma.asc())
                .having(t.gamma)
                .limit(7)
                .offset(19);

  printer.reset();
  std::cerr << serialize(s0, printer).str() << std::endl;

  auto s = dynamic_select(db)
               .dynamic_columns(all_of(t))
               .dynamic_flags()
               .dynamic_from(t)
               .extra_tables(f, t)
               .dynamic_where()
               .dynamic_group_by(t.alpha)
               .dynamic_order_by()
               .dynamic_having(t.gamma)
               .dynamic_limit()
               .dynamic_offset();
  s.select_flags.add(sqlpp::distinct);
  s.selected_columns.add(f.omega);
  s.from.add(f);
  s.where.add(t.alpha > 7);
  s.having.add(t.alpha > 7);
  s.limit.set(3);
  s.offset.set(3);
  s.group_by.add(t.beta);
  s.order_by.add(t.beta.asc());
  for (const auto& row : db(s))
  {
    int64_t a = row.alpha;
    std::cout << a << std::endl;
  }

  printer.reset();
  std::cerr << serialize(s, printer).str() << std::endl;

  select(sqlpp::value(7).as(t.alpha));

  for (const auto& row :
       db(select(sqlpp::case_when(true).then(sqlpp::null).else_(sqlpp::null).as(t.beta)).from(t).where(true)))
  {
    std::cerr << row.beta << std::endl;
  }

  return 0;
}