sqlpp11/tests/core/serialize/CustomQuery.cpp

/*
 * Copyright (c) 2016-2022, 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,
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 */

#include "Sample.h"
#include "compare.h"
#include <sqlpp11/sqlpp11.h>

#include <iostream>

SQLPP_ALIAS_PROVIDER(pragma)

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

  // Unconditionally
  compare(__LINE__,
          custom_query(sqlpp::select(), select_flags(sqlpp::distinct), select_columns(foo.omega), from(foo),
                       sqlpp::unconditionally()),
          "SELECT  DISTINCT  tab_foo.omega  FROM tab_foo ");

  // A full select statement made individual clauses
  compare(__LINE__,
          custom_query(sqlpp::select(), select_flags(sqlpp::distinct), select_columns(foo.omega),
                       from(foo.join(bar).on(foo.omega == bar.alpha)), where(bar.alpha > 17), group_by(foo.omega),
                       having(avg(bar.alpha) > 19), order_by(foo.omega.asc()), sqlpp::limit(10u), sqlpp::offset(100u)),
          "SELECT  DISTINCT  tab_foo.omega  FROM tab_foo INNER JOIN tab_bar ON (tab_foo.omega=tab_bar.alpha)  WHERE "
          "(tab_bar.alpha>17)  GROUP BY tab_foo.omega  HAVING (AVG(tab_bar.alpha)>19)  ORDER BY tab_foo.omega ASC  "
          "LIMIT 10  OFFSET 100");

  // A full select statement made individual clauses
  compare(
      __LINE__,
      custom_query(sqlpp::select(), select_flags(sqlpp::distinct), select_columns(foo.omega),
                   from(foo.join(bar).on(foo.omega == bar.alpha)), where(bar.alpha > 17),
                   group_by(foo.omega), having(avg(bar.alpha) > 19),
                   order_by(foo.omega.asc(), foo.psi.order(sqlpp::sort_type::desc)),
                   sqlpp::limit(7u), sqlpp::offset(3u)),
      "SELECT  DISTINCT  tab_foo.omega  FROM tab_foo INNER JOIN tab_bar ON (tab_foo.omega=tab_bar.alpha)  WHERE "
      "(tab_bar.alpha>17)  GROUP BY tab_foo.omega  HAVING (AVG(tab_bar.alpha)>19)  ORDER BY tab_foo.omega "
      "ASC,tab_foo.psi DESC  LIMIT 7  OFFSET 3");

  // A pragma query for sqlite
  compare(__LINE__,
          custom_query(sqlpp::verbatim("PRAGMA user_version")).with_result_type_of(select(sqlpp::value(1).as(pragma))),
          " PRAGMA user_version");

  // An insert from select for postgresql
  const auto x = 17;
  compare(__LINE__,
          custom_query(insert_into(foo).columns(foo.omega),
                       select(sqlpp::value(x).as(foo.omega))
                           .from(foo)
                           .where(not exists(select(foo.omega).from(foo).where(foo.omega == x)))),
          "INSERT INTO tab_foo (omega) "
          "SELECT 17 AS omega FROM tab_foo "
          "WHERE (NOT EXISTS(SELECT tab_foo.omega FROM tab_foo WHERE (tab_foo.omega=17)))");

  // A multi-row "insert or ignore"
  auto batch = insert_columns(bar.beta, bar.gamma);
  batch.add_values(bar.beta = "sample", bar.gamma = true);
  batch.add_values(bar.beta = "ample", bar.gamma = false);
  compare(__LINE__, custom_query(sqlpp::insert(), sqlpp::verbatim(" OR IGNORE"), into(bar), batch),
          "INSERT  OR IGNORE  INTO tab_bar  (beta,gamma) VALUES ('sample',1),('ample',0)");

  return 0;
}