Question

因为EF不支持开箱即用的全文搜索（据我所知）使用sql命令执行查询

var objctx = (ctx as System.Data.Entity.Infrastructure.IObjectContextAdapter).ObjectContext;
                        query = objctx.CreateQuery<Candidate>(@"select 
                            c.CandidateId,
                            c.ProjectId,
                            c.CreateDate,
                            c.CreatedBy
                            c.DisplayName
                            from candidate as c
                        where (contains(c.DisplayName, @pattern))",
                            new ObjectParameter("pattern", displayNameFilter));

问题来自我甚至无法想象的地方。 EF，形成最终请求，用contains函数包装替换运算符charindex()，以及case-when-bit-convert构造。

怎么办？如何强制EF离开contains而不被重写？

Answer 1

var query = @"select c.CandidateId,c.ProjectId, c.CreateDate, c.CreatedBy c.DisplayName from candidate as c where (contains(c.DisplayName, @p0))";
var result = dbContext.Database.SqlQuery<T>(query, displayNameFilter).ToList();

T是您的结果类型。

SqlQuery（）docs：https://msdn.microsoft.com/en-us/library/jj592907%28v=vs.113%29.aspx

EF取代＆＃39;包含＆＃39;运营商与＆＃39; charindex＆＃39; in raw sql

1 个答案: