Question

我有一个Laravel 5.2应用程序，我需要对数据库进行高级查询，所以我试图使用DB::raw表达式，主要是我的查询是这样的：

SELECT * FROM TableA AS s
        LEFT JOIN TableB AS l FORCE INDEX FOR JOIN (idx_1) 
        ON ((s.mid = l.mid) AND (l.id = 1))
        LEFT JOIN TableC AS f FORCE INDEX FOR JOIN (idx_C_1)
        ON (s.mid = f.mid)
        LEFT JOIN TableD as bl FORCE INDEX FOR JOIN (idx_D_1)
        ON ((bl.ACid = s.ACid) AND ((bl.userid = 1) OR (bl.userid = -1)) AND (bl.type = 1))
        LEFT JOIN TableE AS wl FORCE INDEX FOR JOIN (idx_E_1)
        ON ((wl.sid = s.sid) AND ((wl.userid = 1) AND (wl.type = 2)))
        LEFT JOIN TableF AS gwl FORCE INDEX FOR JOIN (idx_F_1)
        ON ((gwl.sid = s.sid) AND ((gwl.userid = -1) AND (gwl.type = 2)))
        WHERE (bl.sid IS NULL)

所以，它只是被Laravel困扰并且没有向我显示响应，所以我在PHPmyAdmin中执行它并且响应非常快。在Laravel我有这个：

   $query=DB::select(DB::raw(TheQueryAbove))
            ->orderBy('s.reversestamp', 'asc')
            ->offset(0)
            ->limit(26)
            ->paginate(10);

那么，为什么需要这么长时间？或者我如何测试它以找到原因？我已经尝试过：dd(DB::select(DB::raw(TheQueryAbove)))->toSql();没有成功，它甚至没有打印出来。谢谢！

Laravel中的DB :: raw需要很长时间

0 个答案: