mirror of
https://github.com/rbock/sqlpp11.git
synced 2024-11-16 12:51:13 +08:00
96 lines
3.8 KiB
C++
96 lines
3.8 KiB
C++
/*
|
|
* 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>
|
|
|
|
int main(int, char* [])
|
|
{
|
|
const auto foo = test::TabFoo{};
|
|
const auto bar = test::TabBar{};
|
|
|
|
// No expression (not super useful).
|
|
SQLPP_COMPARE(cte(sqlpp::alias::x), "x");
|
|
|
|
// Simple CTE: X AS SELECT
|
|
{
|
|
const auto x = cte(sqlpp::alias::x).as(select(foo.id).from(foo).unconditionally());
|
|
const auto a = x.as(sqlpp::alias::a);
|
|
SQLPP_COMPARE(x, "x AS (SELECT tab_foo.id FROM tab_foo)");
|
|
SQLPP_COMPARE(make_table_ref(x), "x");
|
|
SQLPP_COMPARE(x.id, "x.id");
|
|
SQLPP_COMPARE(a, "x AS a");
|
|
SQLPP_COMPARE(a.id, "a.id");
|
|
SQLPP_COMPARE(all_of(x), "x.id");
|
|
SQLPP_COMPARE(all_of(a), "a.id");
|
|
}
|
|
|
|
// Non-recursive union CTE: X AS SELECT ... UNION ALL SELECT ...
|
|
{
|
|
const auto x =
|
|
cte(sqlpp::alias::x)
|
|
.as(select(foo.id).from(foo).unconditionally().union_all(select(bar.id).from(bar).unconditionally()));
|
|
const auto a = x.as(sqlpp::alias::a);
|
|
SQLPP_COMPARE(x, "x AS (SELECT tab_foo.id FROM tab_foo UNION ALL SELECT tab_bar.id FROM tab_bar)");
|
|
SQLPP_COMPARE(make_table_ref(x), "x");
|
|
SQLPP_COMPARE(x.id, "x.id");
|
|
SQLPP_COMPARE(a, "x AS a");
|
|
SQLPP_COMPARE(a.id, "a.id");
|
|
SQLPP_COMPARE(all_of(x), "x.id");
|
|
SQLPP_COMPARE(all_of(a), "a.id");
|
|
}
|
|
|
|
// Recursive union CTE: X AS SELECT ... UNION ALL SELECT ... FROM X ...
|
|
{
|
|
const auto x_base = cte(sqlpp::alias::x).as(select(sqlpp::value(0).as(sqlpp::alias::a)));
|
|
const auto x = x_base.union_all(select((x_base.a + 1).as(sqlpp::alias::a)).from(x_base).where(x_base.a < 10));
|
|
const auto y = x.as(sqlpp::alias::y);
|
|
SQLPP_COMPARE(x, "x AS (SELECT 0 AS a UNION ALL SELECT (x.a + 1) AS a FROM x WHERE x.a < 10)");
|
|
SQLPP_COMPARE(make_table_ref(x), "x");
|
|
SQLPP_COMPARE(x.a, "x.a");
|
|
SQLPP_COMPARE(y, "x AS y");
|
|
SQLPP_COMPARE(y.a, "y.a");
|
|
SQLPP_COMPARE(all_of(x), "x.a");
|
|
SQLPP_COMPARE(all_of(y), "y.a");
|
|
}
|
|
|
|
// A CTE depending on another CTE
|
|
{
|
|
const auto x = cte(sqlpp::alias::x).as(select(foo.id).from(foo).unconditionally());
|
|
const auto y = cte(sqlpp::alias::y).as(select(x.id, sqlpp::value(7).as(sqlpp::alias::a)).from(x).unconditionally());
|
|
const auto z = y.as(sqlpp::alias::z);
|
|
SQLPP_COMPARE(y, "y AS (SELECT x.id, 7 AS a FROM x)");
|
|
SQLPP_COMPARE(make_table_ref(y), "y");
|
|
SQLPP_COMPARE(y.id, "y.id");
|
|
SQLPP_COMPARE(z, "y AS z");
|
|
SQLPP_COMPARE(z.id, "z.id");
|
|
SQLPP_COMPARE(all_of(y), "y.id, y.a");
|
|
SQLPP_COMPARE(all_of(z), "z.id, z.a");
|
|
}
|
|
|
|
return 0;
|
|
}
|