实体框架有时不返回结果到列表

Question

我有EF的问题。所以，我在我的mysql表中有1000000条记录。我需要限制查询。例如，我做跳过查询50000

var listRoutes = (from c in context.Routes 
          where c.Alias != "" 
          orderby c.Alias ascending 
          select c).Skip(50000).Take(500).ToList(); 

和listRoutes有500条记录。如果我做查询与跳过100000

var listRoutes = (from c in context.Routes 
           where c.Alias != "" 
           orderby c.Alias ascending 
           select c).Skip(100000).Take(500).ToList(); 

或

List<Route> listRoutes = context.Routes.Where(x => x.Alias != "").OrderBy(a => a.Alias).Skip(100000).Take(500).ToList(); 

listRoutes有0的记录。但是，如果我做查询跳过100000或更多

List<Route> listRoutes = context.Database.SqlQuery<Route>("SELECT * FROM testcmsdatamap.routes WHERE alias != '' order by alias asc limit 500000, 500").ToList(); 

listRoutes也有500 ...什么问题？

Answer 1

问题已解决。大数据出现问题。 EF构建错误的SQL。为INDEX构建简单的SQL查询。所以，我有其他问题Entity Framework with Mysql Index