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Remove multi_column.

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While a nice feature in theory, this was extremely rarely used
and added quite a bit of complexity to the code.
This commit is contained in:
Roland Bock
2021-07-30 21:05:36 +02:00
parent 77db53436d
commit 34a8f34821
11 changed files with 15 additions and 401 deletions
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28
tests/SelectType.cpp
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@@ -330,34 +330,6 @@ int SelectType(int, char*[])
// static_assert(std::is_same<decltype(b), decltype(c)>::value, "t has to be expanded by select()");
}
// Test that all_of(tab) is expanded in multi_column
{
auto a = multi_column(all_of(t)).as(alias::a);
auto b = multi_column(t.alpha, t.beta, t.gamma, t.delta).as(alias::a);
static_assert(std::is_same<decltype(a), decltype(b)>::value, "all_of(t) has to be expanded by multi_column");
}
// Test that a multicolumn is not a value
{
auto m = multi_column(t.alpha, t.beta).as(alias::a);
static_assert(not sqlpp::is_expression_t<decltype(m)>::value, "a multi_column is not a value");
}
// Test result field indices
{
using Select = decltype(select(all_of(t), // index 0, 1, 2, 3 (alpha, beta, gamma, delta)
multi_column(all_of(t)).as(alias::left), // index 4 (including 4, 5, 6, 7)
multi_column(all_of(t)).as(alias::right), // index 8 (including 8, 9, 10, 11)
t.alpha.as(alias::a) // index 12
)
.from(t)
.unconditionally()); // next index is 13
using ResultRow = typename Select::_result_methods_t<Select>::template _result_row_t<MockDb>;
using IndexSequence = ResultRow::_field_index_sequence;
static_assert(std::is_same<IndexSequence, sqlpp::detail::field_index_sequence<13, 0, 1, 2, 3, 4, 8, 12>>::value,
"invalid field sequence");
}
// Test that result sets with identical name/value combinations have identical types
{
auto a = select(t.alpha);