小编use*_*112的帖子

我在Entity Framework 4.1和MySql Connector/Net 6.4.3中遇到了规范函数的问题.根据Microsoft的说法,所有数据库提供者都可以从LINQ生成的SQL中理解并将其转换为本地SQL方言; http://msdn.microsoft.com/en-us/library/bb738626.aspx但是,我的代码在CurrentUtcDateTime()上窒息,这里列出了; http://msdn.microsoft.com/en-us/library/bb738563.aspx

以下是生成攻击性SQL的LINQ查询(来自NopCommerce):

    public List<Poll> GetPolls(int languageId, int pollCount, bool loadShownOnHomePageOnly)
    {
        bool showHidden = NopContext.Current.IsAdmin;


        var query = (IQueryable<Poll>)_context.Polls;
        if (!showHidden)
        {
            query = query.Where(p => p.Published);
            query = query.Where(p => !p.StartDate.HasValue || p.StartDate <= DateTime.UtcNow);
            query = query.Where(p => !p.EndDate.HasValue || p.EndDate >= DateTime.UtcNow);
        }
        if (loadShownOnHomePageOnly)
        {
            query = query.Where(p => p.ShowOnHomePage);
        }
        if (languageId > 0)
        {
            query = query.Where(p => p.LanguageId == languageId);
        }

        query = query.OrderBy(p => p.DisplayOrder); …