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64 lines
2.7 KiB
C++
64 lines
2.7 KiB
C++
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/*
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* Copyright (c) 2024, Roland Bock
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "Sample.h"
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#include "../compare.h"
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#include <sqlpp11/sqlpp11.h>
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int main(int, char* [])
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{
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const auto foo = test::TabFoo{};
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const auto bar = test::TabBar{};
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// No expression (not super useful).
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SQLPP_COMPARE(cte(sqlpp::alias::x), "x");
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// WITH Simple CTE: X AS SELECT
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{
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const auto x = cte(sqlpp::alias::x).as(select(foo.id).from(foo).unconditionally());
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SQLPP_COMPARE(with(x), "WITH x AS (SELECT tab_foo.id FROM tab_foo) ");
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}
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// WITH Non-recursive union CTE: X AS SELECT ... UNION ALL SELECT ...
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{
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const auto x =
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cte(sqlpp::alias::x)
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.as(select(foo.id).from(foo).unconditionally().union_all(select(bar.id).from(bar).unconditionally()));
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SQLPP_COMPARE(with(x), "WITH x AS (SELECT tab_foo.id FROM tab_foo UNION ALL SELECT tab_bar.id FROM tab_bar) ");
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}
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// WITH Recursive union CTE: X AS SELECT ... UNION ALL SELECT ... FROM X ...
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{
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const auto x_base = cte(sqlpp::alias::x).as(select(sqlpp::value(0).as(sqlpp::alias::a)));
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const auto x = x_base.union_all(select((x_base.a + 1).as(sqlpp::alias::a)).from(x_base).where(x_base.a < 10));
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using X = typename std::decay<decltype(x)>::type;
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static_assert(X::_is_recursive, "");
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#warning: Need to test that recursive CTEs are detected as being recursive.
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SQLPP_COMPARE(with(x), "WITH RECURSIVE x AS (SELECT 0 AS a UNION ALL SELECT (x.a + 1) AS a FROM x WHERE x.a < 10) ");
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}
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return 0;
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}
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