SQL查询VS LINQ到实体返回不同的结果

Question

这是我的SQL查询

SELECT TOP(10)projects.stat, 
       wo.stat, 
       sevt.restype, 
       sevt.resid, 
       restype.user2, 
       projects.prj_id, 
       projects.user3, 
       projects.user9, 
       wo.wonum, 
       wo.jobdesc, 
       sevt.sesid, 
       sevt.restype, 
       sevt.type, 
       sevt.t_start, 
       sevt.t_end, 
       sevt. mealstart, 
       sevt.mealend, 
       sevt. melstart2, 
       sevt.melend2, 
       sevt.melstart3, 
       sevt.melend3, 
       sevt.user2, 
       sevt.subactid, 
       sevt.ot_exempt, 
       sevt_ex.user5, 
       rescat.user1 
FROM schedwin.projects 
     INNER JOIN schedwin.wo 
       ON projects.prj_id = wo.prj_id 
     INNER JOIN schedwin.sevt 
       ON wo.seqnum = sevt.seqnum 
     INNER JOIN schedwin.rsrce 
       ON sevt.resid = rsrce.resid 
     LEFT OUTER JOIN schedwin.pers 
        ON rsrce.recid = pers.recid 
     INNER JOIN schedwin.restype 
       ON sevt.rtype = restype.code 
     INNER JOIN schedwin.rescat 
       ON sevt.rcat = rescat.code 
     LEFT OUTER JOIN schedwin.sevt_ex 
        ON sevt.sesid = sevt_ex.sesid 
WHERE (Ltrim(Rtrim(projects.stat)) IN ('1', '2')) 
     AND (Ltrim(Rtrim(wo.stat)) = '6') 
     AND (((sevt.restype = 5 
        OR sevt.restype = 0) 
       AND (Substring(restype.user2, 2, 1) = 'F' 
        AND Substring(restype.user2, 6, 1) = 'S')) 
       OR (sevt.restype = 4)) 
     AND (sevt.type = 0) 
     AND rescat.groupid = 0 
     AND restype.groupid = 0 
     AND Len(Ltrim(wo.invoice)) > 0 
     AND Ltrim(wo.invoice) <> 'PENDING' 
     AND wo.userflag1 <> 1 
     AND Ltrim(sevt.t_start) = '1351728000' 
ORDER BY projects.prj_id, 
      wo.wonum 

我转换到LINQ到实体像下面

  var query = 
      (from PROJECTS in db.PROJECTS 
      join WOes in db.WOes on PROJECTS.PRJ_ID equals WOes.PRJ_ID 
      join SEVTs in db.SEVTs on WOes.SEQNUM equals SEVTs.SEQNUM 
      join RSRCEs in db.RSRCEs on SEVTs.RESID equals RSRCEs.RESID 
      join PERS in db.PERS on RSRCEs.RECID equals PERS.RECID into PERS_join 
      from PERS in PERS_join.DefaultIfEmpty() 
      join RESTYPEs in db.RESTYPEs on new { RTYPE = SEVTs.RTYPE } equals new { RTYPE = RESTYPEs.CODE } 
      join RESCATs in db.RESCATs on new { RCAT = SEVTs.RCAT } equals new { RCAT = RESCATs.CODE } 
      join SEVT_EX in db.SEVT_EX on SEVTs.SESID equals SEVT_EX.SESID into SEVT_EX_join 
      //join SEVT_EX in db.SEVT_EX on new { SESID = (String)SEVTs.SESID } equals new { SESID = SEVT_EX.SESID } into SEVT_EX_join 
      from SEVT_EX in SEVT_EX_join.DefaultIfEmpty() 
      where 
       (new string[] { "1", "2" }).Contains((PROJECTS.STAT.TrimEnd()).TrimStart()) && 
       ((WOes.STAT.TrimEnd()).TrimStart() == "6") && 
       (((SEVTs.RESTYPE == 5 || SEVTs.RESTYPE == 0) && 
       (RESTYPEs.USER2.Substring(2 - 1, 1) == "F" && RESTYPEs.USER2.Substring(6 - 1, 1) == "S")) || (SEVTs.RESTYPE == 0)) && 
       (SEVTs.TYPE == 0) && 
       (RESCATs.GROUPID == 0) && 
       (RESTYPEs.GROUPID == 0)&& 
       (int?)(WOes.INVOICE.TrimStart()).Length > 0 && 
       WOes.INVOICE.TrimStart() != "PENDING" && 
       WOes.USERFLAG1 != 1 && 
      (SEVTs.T_START.TrimStart()) == (Booktime) 
      //(SEVTs.T_START.TrimStart()) == (Booktime) 
      // String.Compare(SEVTs.T_START.ToString().TrimStart(), "1351728000") >= 0 
      //Convert.ToInt32(SEVTs.T_START.TrimStart()) >= Convert.ToInt32(Booktime) 
      orderby 
      PROJECTS.PRJ_ID, 
      WOes.WONUM 
      select new 
      { 
       PROJECTS.PRJ_ID, 
       PROJECTS.USER3, 
       PROJECTS.USER9, 
       WOes.WONUM, 
       WOes.JOBDESC, 
       SEVTs.SESID, 
       SEVTs.RESTYPE, 
       SEVTs.TYPE, 
       SEVTs.T_START, 
       SEVTs.T_END, 
       SEVTs.MEALEND, 
       SEVTs.MELSTART3, 
       SEVTs.MELSTART2, 
       SEVTs.MELEND2, 
       Column1 = SEVTs.MELSTART2, 
       SEVTs.MELEND3, 
       SEVTs.USER2, 
       SEVTs.SUBACTID, 
       SEVTs.OT_EXEMPT, 
       USER5 = SEVT_EX.USER5, 
       SEVTs.GMT_OFFSET, 
       SEVTs.MEALSTART, 
       SEVTs.STANDARD, 
       RESCATs.USER1, 
       SEVTs.RESID 
      }).Take(10); 

肯定我的SQL查询返回正确的记录回来，但我的Linq不是，任何有任何线索，请在这里失踪？

感谢

Answer 1

你有这样一行：

(((SEVT.restype = 5 or SEVT.restype = 0) and (substring(restype.User2,2,1) = 'F' and substring(restype.User2,6,1) = 'S')) or (SEVT.RESTYPE = 4))and 

，并在LINQ你有这样的

((SEVTs.RESTYPE == 5 || SEVTs.RESTYPE == 0) && (RESTYPEs.USER2.Substring(2 - 1, 1) == "F" && RESTYPEs.USER2.Substring(6 - 1, 1) == "S") && SEVTs.TYPE == 0) 

首先，在2-1 = 1不2子串和逻辑运算不等于