sqlpp11/tests/core/serialize/clause/select_columns.cpp

/*
 * Copyright (c) 2024, 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 "Sample.h"
#include "../compare.h"
#include <sqlpp11/sqlpp11.h>

SQLPP_ALIAS_PROVIDER(cheese);
SQLPP_ALIAS_PROVIDER(cake);

int main(int, char* [])
{
  const auto val = sqlpp::value(17);
  const auto expr = sqlpp::value(17) + 4;

  const auto foo = test::TabFoo{};

  // Plain columns.
  SQLPP_COMPARE(select_columns(foo.id), "tab_foo.id");
  SQLPP_COMPARE(select_columns(foo.textNnD), "tab_foo.text_nn_d");
  SQLPP_COMPARE(select_columns(foo.boolN), "tab_foo.bool_n");

  // Multiple plain columns.
  SQLPP_COMPARE(select_columns(foo.id, foo.textNnD, foo.boolN), "tab_foo.id, tab_foo.text_nn_d, tab_foo.bool_n");

  // Single expression
  SQLPP_COMPARE(select_columns((foo.id + 17).as(cake)), "(tab_foo.id + 17) AS cake");

  // Single dynamic column.
  SQLPP_COMPARE(select_columns(dynamic(true, foo.id)), "tab_foo.id");
#warning: This needs a special special to-string strategy in select_columns
  SQLPP_COMPARE(select_columns(dynamic(false, foo.id)), "NULL AS id");

  // Multiple dynamic columns (this is odd if all are dynamic)
  SQLPP_COMPARE(select_columns(dynamic(true, foo.id), foo.textNnD, foo.boolN), "tab_foo.id, tab_foo.text_nn_d, tab_foo.bool_n");
  SQLPP_COMPARE(select_columns(foo.id, dynamic(true, foo.textNnD), foo.boolN), "tab_foo.id, tab_foo.text_nn_d, tab_foo.bool_n");
  SQLPP_COMPARE(select_columns(foo.id, foo.textNnD, dynamic(true, foo.boolN)), "tab_foo.id, tab_foo.text_nn_d, tab_foo.bool_n");

  SQLPP_COMPARE(select_columns(dynamic(false, foo.id), foo.textNnD, foo.boolN), "NULL AS id, tab_foo.text_nn_d, tab_foo.bool_n");
  SQLPP_COMPARE(select_columns(foo.id, dynamic(false, foo.textNnD), foo.boolN), "tab_foo.id, NULL AS text_nn_d, tab_foo.bool_n");
  SQLPP_COMPARE(select_columns(foo.id, foo.textNnD, dynamic(false, foo.boolN)), "tab_foo.id, tab_foo.text_nn_d, NULL AS bool_n");

  SQLPP_COMPARE(select_columns(foo.id, dynamic(false, foo.textNnD), dynamic(false, foo.boolN)), "tab_foo.id, NULL AS text_nn_d, NULL AS bool_n");
  SQLPP_COMPARE(select_columns(dynamic(false, foo.id), foo.textNnD, dynamic(false, foo.boolN)), "NULL AS id, tab_foo.text_nn_d, NULL AS bool_n");
  SQLPP_COMPARE(select_columns(dynamic(false, foo.id), dynamic(false, foo.textNnD), foo.boolN), "NULL AS id, NULL AS text_nn_d, tab_foo.bool_n");

  // Single declared column
  SQLPP_COMPARE(select_columns(declare_group_by_column(val).as(cheese)), "17 AS cheese");
  SQLPP_COMPARE(select_columns(declare_group_by_column(foo.id + 17).as(cake)), "(tab_foo.id + 17) AS cake");

  // Mixed declared column
  SQLPP_COMPARE(select_columns(foo.id, declare_group_by_column(val).as(cheese)), "tab_foo.id, 17 AS cheese");
  SQLPP_COMPARE(select_columns(declare_group_by_column(val).as(cake), foo.id), "17 AS cake, tab_foo.id");

  // Mixed dynamic declared column
  SQLPP_COMPARE(select_columns(foo.id, dynamic(true, declare_group_by_column(val)).as(cheese)), "tab_foo.id, 17 AS cheese");
  SQLPP_COMPARE(select_columns(dynamic(true, declare_group_by_column(val)).as(cake), foo.id), "17 AS cake, tab_foo.id");

  SQLPP_COMPARE(select_columns(foo.id, dynamic(false, declare_group_by_column(val)).as(cheese)), "tab_foo.id, NULL AS cheese");
  SQLPP_COMPARE(select_columns(dynamic(false, declare_group_by_column(val)).as(cake), foo.id), "NULL AS cake, tab_foo.id");

  return 0;
}