C++ (Cpp) RowPtr::size示例

示例#1

文件： engine.cpp 项目： sunfirefox/yb-orm

const Value
EngineBase::select1(const Expression &what,
        const Expression &from, const Expression &where)
{
    RowPtr row = select_row(what, from, where);
    if (row->size() != 1)
        throw BadSQLOperation(_T("Unable to fetch exactly one column!"));
    return row->begin()->second;
}