實體框架在不同的工作站上生成不同的查詢

Question

我們在單個Developer Machine和幾個客戶端上遇到問題。 單個Linq查詢生成兩個不同的SQL查詢。 問題實際上是第二個查詢具有Firebird不支持的“ OUTER APPLY”語句。 我們認為這不是代碼問題，而是環境問題，但是我將粘貼代碼。

linq：

AIds = (from x in context.RISK_T_ASSESS_HIST
    where (x.ID_RISKOBJECT.HasValue && x.F_CREATEDON >= Freq.StartDate && x.F_CREATEDON <= Freq.EndDate)
    group x by x.ID_RISKOBJECT into gr
    let lastCreated = gr.Max(p => p.F_CREATEDON)
    select new
    {
        ObjId = gr.Key
        ,
        LastStatus = gr.Where(p => p.F_CREATEDON == lastCreated && p.ID_RISKOBJECT == gr.Key).Select(p => p.F_STATUS).FirstOrDefault()
    }).Where(x => x.LastStatus == 0 || x.LastStatus == 1).Select(x => x.ObjId.Value).ToArray();

SQL與外部應用

SELECT 
"G"."ID_RISKOBJECT" AS "ID_RISKOBJECT"
FROM   (SELECT 
    "C"."A1" AS "C1", 
    "C"."K1" AS "ID_RISKOBJECT"
    FROM ( SELECT 
        "E"."ID_RISKOBJECT" AS "K1", 
        MAX("E"."F_CREATEDON") AS "A1"
        FROM "RISK_T_ASSESS_HIST" AS "E"
        WHERE (("E"."ID_RISKOBJECT" IS NOT NULL) AND ("E"."F_CREATEDON" >=     @p__linq__0)) AND ("E"."F_CREATEDON" <= @p__linq__1)     
        GROUP BY "E"."ID_RISKOBJECT"
    )  AS "C" ) AS "G"
OUTER APPLY  (SELECT FIRST (1) 
    "I"."F_STATUS" AS "F_STATUS"
    FROM "RISK_T_ASSESS_HIST" AS "I"
    WHERE (((("I"."ID_RISKOBJECT" IS NOT NULL) AND ("I"."F_CREATEDON" >=     @p__linq__0)) AND ("I"."F_CREATEDON" <= @p__linq__1)) AND (("G"."ID_RISKOBJECT" =         "I"."ID_RISKOBJECT") OR (("G"."ID_RISKOBJECT" IS NULL) AND ("I"."ID_RISKOBJECT" IS     NULL)))) AND (("I"."F_CREATEDON" = "G"."C1") AND ("I"."ID_RISKOBJECT" =     "G"."ID_RISKOBJECT")) ) AS "J"    
WHERE (0 = "J"."F_STATUS") OR (1 = "J"."F_STATUS")

工作SQL

SELECT 
"B"."ID_RISKOBJECT" AS "ID_RISKOBJECT"
 FROM ( SELECT 
        "C"."ID_RISKOBJECT" AS "ID_RISKOBJECT", 
       (SELECT FIRST (1) 
             "I"."F_STATUS" AS "F_STATUS"
              FROM "RISK_T_ASSESS_HIST" AS "I"
         WHERE (((("I"."ID_RISKOBJECT" IS NOT NULL) AND ("I"."F_CREATEDON" >= @p__linq__0)) AND ("I"."F_CREATEDON" <= @p__linq__1)) AND (("C"."ID_RISKOBJECT" = "I"."ID_RISKOBJECT") OR (("C"."ID_RISKOBJECT" IS NULL) AND ("I"."ID_RISKOBJECT" IS NULL)))) AND (("I"."F_CREATEDON" = "C"."C1") AND ("I"."ID_RISKOBJECT" = "C"."ID_RISKOBJECT"))) AS "C1"
   FROM ( SELECT 
         "D"."A1" AS "C1", 
         "D"."K1" AS "ID_RISKOBJECT"
         FROM ( SELECT 
                "F"."ID_RISKOBJECT" AS "K1", 
                MAX("F"."F_CREATEDON") AS "A1"
                FROM "RISK_T_ASSESS_HIST" AS "F"
                WHERE (("F"."ID_RISKOBJECT" IS NOT NULL) AND ("F"."F_CREATEDON" >= @p__linq__0)) AND ("F"."F_CREATEDON" <= @p__linq__1)
                GROUP BY "F"."ID_RISKOBJECT"
         )  AS "D"
   )  AS "C"    
)  AS "B"
      WHERE (0 = "B"."C1") OR (1 = "B"."C1")

為MSSQL Engine生成的查詢（我們在APP中支持兩個數據庫引擎）

SELECT 
[Project1].[ID_RISKOBJECT] AS [ID_RISKOBJECT]
FROM   (SELECT 
    [GroupBy1].[A1] AS [C1], 
    [GroupBy1].[K1] AS [ID_RISKOBJECT]
    FROM ( SELECT 
        [Extent1].[ID_RISKOBJECT] AS [K1], 
        MAX([Extent1].[F_CREATEDON]) AS [A1]
        FROM [dbo].[RISK_T_ASSESS_HIST] AS [Extent1]
        WHERE ([Extent1].[ID_RISKOBJECT] IS NOT NULL) AND ([Extent1].[F_CREATEDON] >= @p__linq__0) AND ([Extent1].[F_CREATEDON] <= @p__linq__1)
        GROUP BY [Extent1].[ID_RISKOBJECT]
    )  AS [GroupBy1] ) AS [Project1]
 OUTER APPLY  (SELECT TOP (1) 
    [Extent2].[F_STATUS] AS [F_STATUS]
    FROM [dbo].[RISK_T_ASSESS_HIST] AS [Extent2]
    WHERE ([Extent2].[ID_RISKOBJECT] IS NOT NULL) AND ([Extent2].[F_CREATEDON] >=     @p__linq__0) AND ([Extent2].[F_CREATEDON] <= @p__linq__1) AND (([Project1].[ID_RISKOBJECT] = [Extent2].[ID_RISKOBJECT]) OR (([Project1].[ID_RISKOBJECT] IS NULL) AND ([Extent2].    [ID_RISKOBJECT] IS NULL))) AND ([Extent2].[F_CREATEDON] = [Project1].[C1]) AND ([Extent2].[ID_RISKOBJECT] = [Project1].[ID_RISKOBJECT]) ) AS [Limit1]    
WHERE [Limit1].[F_STATUS] IN (0,1)    

Answer 1

您是否正在針對SQL Server開發？

如果使用的是.edmx，則ProviderManifestToken屬性（通常在XML的前10行中）將指示所支持的SQL功能集。 這取決於從數據庫創建或更新模型時使用的數據庫。 例如，一個常見的問題是針對SQL 2008本地數據庫進行工作，然后推送至2005數據庫，並發現該應用程序崩潰是因為它不支持SQL 2005中的datetime2。此例中的解決方法是將自動創建的值更改為2008至2005

我不熟悉對抗火鳥的工作，但建議您在此領域中尋找。

Answer 2

問題出在Net Framework 4.5和firebirdsql.data.firebirdclient.dll之間-當sb安裝了此版本的框架時-EntityFramework為firebird生成外部apply語句。

大概Jiri Cincura（cincura.net）應該進行調查：)

通過將.net框架降級為4.0完全解決的問題