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118 lines
5.0 KiB
C++
118 lines
5.0 KiB
C++
/*
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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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// 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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const auto a = x.as(sqlpp::alias::a);
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SQLPP_COMPARE(x, "x AS (SELECT tab_foo.id FROM tab_foo)");
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SQLPP_COMPARE(make_table_ref(x), "x");
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SQLPP_COMPARE(x.id, "x.id");
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SQLPP_COMPARE(a, "x AS a");
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SQLPP_COMPARE(a.id, "a.id");
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SQLPP_COMPARE(all_of(x), "x.id");
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SQLPP_COMPARE(all_of(a), "a.id");
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}
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// 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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const auto a = x.as(sqlpp::alias::a);
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SQLPP_COMPARE(x, "x AS (SELECT tab_foo.id FROM tab_foo UNION ALL SELECT tab_bar.id FROM tab_bar)");
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SQLPP_COMPARE(make_table_ref(x), "x");
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SQLPP_COMPARE(x.id, "x.id");
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SQLPP_COMPARE(a, "x AS a");
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SQLPP_COMPARE(a.id, "a.id");
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SQLPP_COMPARE(all_of(x), "x.id");
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SQLPP_COMPARE(all_of(a), "a.id");
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}
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// Recursive 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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const auto y = x.as(sqlpp::alias::y);
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SQLPP_COMPARE(x, "x AS (SELECT 0 AS a UNION ALL SELECT (x.a + 1) AS a FROM x WHERE x.a < 10)");
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SQLPP_COMPARE(make_table_ref(x), "x");
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SQLPP_COMPARE(x.a, "x.a");
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SQLPP_COMPARE(y, "x AS y");
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SQLPP_COMPARE(y.a, "y.a");
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SQLPP_COMPARE(all_of(x), "x.a");
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SQLPP_COMPARE(all_of(y), "y.a");
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}
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// A CTE depending on another CTE
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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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const auto y = cte(sqlpp::alias::y).as(select(x.id, sqlpp::value(7).as(sqlpp::alias::a)).from(x).unconditionally());
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const auto z = y.as(sqlpp::alias::z);
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SQLPP_COMPARE(y, "y AS (SELECT x.id, 7 AS a FROM x)");
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SQLPP_COMPARE(make_table_ref(y), "y");
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SQLPP_COMPARE(y.id, "y.id");
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SQLPP_COMPARE(z, "y AS z");
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SQLPP_COMPARE(z.id, "z.id");
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SQLPP_COMPARE(all_of(y), "y.id, y.a");
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SQLPP_COMPARE(all_of(z), "z.id, z.a");
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}
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// Dynamically recursive 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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auto x = x_base.union_all(dynamic(true, select((x_base.a + 1).as(sqlpp::alias::a)).from(x_base).where(x_base.a < 10)));
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SQLPP_COMPARE(x, "x AS (SELECT 0 AS a UNION ALL SELECT (x.a + 1) AS a FROM x WHERE x.a < 10)");
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x = x_base.union_all(dynamic(false, select((x_base.a + 1).as(sqlpp::alias::a)).from(x_base).where(x_base.a < 10)));
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SQLPP_COMPARE(x, "x AS (SELECT 0 AS a)");
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}
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// Dynamically recursive CTE: X AS SELECT ... UNION DISTINCT 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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auto x = x_base.union_distinct(dynamic(true, select((x_base.a + 1).as(sqlpp::alias::a)).from(x_base).where(x_base.a < 10)));
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SQLPP_COMPARE(x, "x AS (SELECT 0 AS a UNION DISTINCT SELECT (x.a + 1) AS a FROM x WHERE x.a < 10)");
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x = x_base.union_distinct(dynamic(false, select((x_base.a + 1).as(sqlpp::alias::a)).from(x_base).where(x_base.a < 10)));
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SQLPP_COMPARE(x, "x AS (SELECT 0 AS a)");
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}
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return 0;
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}
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