sqlpp11/tests/core/serialize/Exists.cpp

/*
 * Copyright (c) 2023, 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,
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#include "Sample.h"
#include "compare.h"
#include <sqlpp11/sqlpp11.h>

int Exists(int, char* [])
{
  const auto bar = test::TabBar{};

  // With sub select.
  compare(__LINE__, exists(select(bar.alpha).from(bar).where(bar.alpha > 17)), "EXISTS(SELECT tab_bar.alpha FROM tab_bar WHERE (tab_bar.alpha>17))");
  compare(__LINE__, bar.beta == "" and exists(select(bar.alpha).from(bar).where(bar.alpha > 17)),
          "((tab_bar.beta='') AND EXISTS(SELECT tab_bar.alpha FROM tab_bar WHERE (tab_bar.alpha>17)))");

  return 0;
}