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Added a few more UNION tests

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rbock
2016-11-01 18:38:09 +01:00
parent ae37d063a4
commit c6062116f8
1 changed files with 15 additions and 0 deletions
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15
tests/Union.cpp
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@@ -29,6 +29,12 @@
#include <sqlpp11/alias_provider.h>
#include <iostream>
namespace greek
{
SQLPP_ALIAS_PROVIDER(alpha)
SQLPP_ALIAS_PROVIDER(beta)
}
int Union(int, char* [])
{
MockDb db;
@@ -40,6 +46,15 @@ int Union(int, char* [])
db(select(t.alpha).from(t).unconditionally().union_distinct(select(f.epsilon.as(t.alpha)).from(f).unconditionally()));
db(select(t.alpha).from(t).unconditionally().union_all(select(f.epsilon.as(t.alpha)).from(f).unconditionally()));
// t.alpha can be null, a given value cannot
db(select(t.alpha).from(t).unconditionally().union_all(select(sqlpp::value(1).as(t.alpha))));
db(select(t.alpha).from(t).unconditionally().union_all(select(sqlpp::value(1).as(greek::alpha))));
// t.beta can be null, f.delta cannot
static_assert(sqlpp::can_be_null_t<decltype(t.beta)>::value, "");
static_assert(!sqlpp::can_be_null_t<decltype(f.delta)>::value, "");
db(select(t.beta).from(t).unconditionally().union_all(select(f.delta.as(greek::beta)).from(f).unconditionally()));
auto u = select(t.alpha)
.from(t)
.unconditionally()