Sql server sqlserver过程优化测试模式改进

我最近一直在做一些SQL Server过程优化，并在寻找一种测试模式（时间和结果）。到目前为止，我已经提出了这个解决方案：

SET NOCOUNT ON;
----------------------------------------------------------------------------------------------------------------
-- Procedures data and performance testing pattern
----------------------------------------------------------------------------------------------------------------
-- Prepare test queries (most likely will be taken from Logs.ProcedureTraceData (DATAUK/DATAUS servers)
-- Procedures should insert records into Temporary table, so we can compare their results using EXCEPT
-- If result set columns are fixed (i.e. no Dynamic SQL is used), we can create Temporary tables inside script
--  and insert records in them to do comparison and just TRUNCATE them at the end of the loop.
--  example here: http://stackoverflow.com/a/654418/3680098
-- If there're any data discrepancies or record counts are different, it will be displayed in TraceLog table
----------------------------------------------------------------------------------------------------------------
-- Create your own TraceLog table to keep records
----------------------------------------------------------------------------------------------------------------
/*
CREATE TABLE Temporary._EB_TraceLog
(
    ID INT NOT NULL IDENTITY(1, 1) CONSTRAINT PK_Temporary_EB_TraceLog_ID PRIMARY KEY
    , CurrentExecutionTime INT
    , TempExecutionTime INT
    , CurrentExecutionResultsCount INT
    , TempExecutionResultsCount INT
    , IsDifferent BIT CONSTRAINT DF_Temporary_EB_TraceLog_IsDifferent DEFAULT 0 NOT NULL
    , TimeDiff AS CurrentExecutionTime - TempExecutionTime
    , PercentageDiff AS CAST(((CAST(CurrentExecutionTime AS DECIMAL)/ CAST(TempExecutionTime AS DECIMAL)) * 100 - 100) AS DECIMAL(10, 2))
    , TextData NVARCHAR(MAX)
);

SELECT *
FROM Temporary._EB_TraceLog;

TRUNCATE TABLE Temporary._EB_TraceLog;
*/

INSERT INTO Temporary._EB_TraceLog (TextData)
SELECT TextData
FROM Temporary._EB_GetData_Timeouts
EXCEPT
SELECT TextData
FROM Temporary._EB_TraceLog;

DECLARE @Counter INT;

SELECT @Counter = MIN(ID)
FROM Temporary._EB_TraceLog
WHERE CurrentExecutionTime IS NULL
    OR TempExecutionTime IS NULL
    OR CurrentExecutionResultsCount IS NULL
    OR TempExecutionResultsCount IS NULL;

WHILE @Counter <= (SELECT MAX(ID) FROM Temporary._EB_TraceLog)
BEGIN
    DECLARE @SQLStringCurr NVARCHAR(MAX);
    DECLARE @SQLStringTemp NVARCHAR(MAX);
    DECLARE @StartTime DATETIME2;
    SELECT @SQLStringCurr = REPLACE(TextData, 'dbo.GetData', 'Temporary._EB_GetData_Orig')
        , @SQLStringTemp = REPLACE(TextData, 'dbo.GetData', 'Temporary._EB_GetData_Mod')
    FROM Temporary._EB_TraceLog
    WHERE ID = @Counter;

    ----------------------------------------------------------------------------------------------------------------
    -- Drop temporary tables in script, so these numbers don't figure in SP execution time
    ----------------------------------------------------------------------------------------------------------------
    IF OBJECT_ID(N'Temporary._EB_Test_Orig') IS NOT NULL
        DROP TABLE Temporary._EB_Test_Orig;

    IF OBJECT_ID(N'Temporary._EB_Test_Mod') IS NOT NULL
        DROP TABLE Temporary._EB_Test_Mod;

    ----------------------------------------------------------------------------------------------------------------
    -- Actual testing
    ----------------------------------------------------------------------------------------------------------------
    -- Take time snapshot and execute original procedure, which inserts records into Temporary table
    -- When done - measurements will be updated on TraceLog table
    ----------------------------------------------------------------------------------------------------------------
    SELECT @StartTime = CURRENT_TIMESTAMP;
    EXECUTE sp_executesql @SQLStringCurr;

    UPDATE T
    SET T.CurrentExecutionTime = DATEDIFF(MILLISECOND, @StartTime, CURRENT_TIMESTAMP)
    FROM Temporary._EB_TraceLog AS T
    WHERE T.ID = @Counter;

    ----------------------------------------------------------------------------------------------------------------
    -- Take time snapshot and execute optimized procedure, which inserts records into Temporary table
    -- When done - measurements will be updated on TraceLog table
    ----------------------------------------------------------------------------------------------------------------
    SELECT @StartTime = CURRENT_TIMESTAMP;
    EXECUTE sp_executesql @SQLStringTemp;

    UPDATE T
    SET T.TempExecutionTime = DATEDIFF(MILLISECOND, @StartTime, CURRENT_TIMESTAMP)
    FROM Temporary._EB_TraceLog AS T
    WHERE T.ID = @Counter;

    ----------------------------------------------------------------------------------------------------------------
    -- Check if there are any data discrepancies
    -- If there are any, set IsDifferent to 1, so we can find the root cause
    ----------------------------------------------------------------------------------------------------------------
    IF EXISTS (SELECT * FROM Temporary._EB_Test_Mod EXCEPT SELECT * FROM Temporary._EB_Test_Orig)
    OR EXISTS (SELECT * FROM Temporary._EB_Test_Orig EXCEPT SELECT * FROM Temporary._EB_Test_Mod)
    BEGIN
        UPDATE T
        SET T.IsDifferent = 1
        FROM Temporary._EB_TraceLog AS T
        WHERE T.ID = @Counter;
    END

    ----------------------------------------------------------------------------------------------------------------
    -- Update record counts for each execution
    -- We can check if there aren't any different record counts even tho results are same
    -- EXCEPT clause removes duplicates when doing checks
    ----------------------------------------------------------------------------------------------------------------
    UPDATE T
    SET T.CurrentExecutionResultsCount = (SELECT COUNT(*) FROM Temporary._EB_Test_Orig)
        , T.TempExecutionResultsCount = (SELECT COUNT(*) FROM Temporary._EB_Test_Mod)
    FROM Temporary._EB_TraceLog AS T
    WHERE T.ID = @Counter;

    ----------------------------------------------------------------------------------------------------------------
    -- Print iteration number and proceed on next one
    ----------------------------------------------------------------------------------------------------------------
    PRINT @Counter;
    SET @Counter += 1;
END

SELECT *
FROM Temporary._EB_TraceLog;

但是，有没有一种方法可以获取汇总的值并将它们放在我的TraceLog表中

最重要的是，这段代码中有没有什么不合理的地方

---

谢谢

您可以使用此查询

SELECT total_elapsed_time
FROM sys.dm_exec_query_stats 
WHERE sql_handle in (SELECT most_recent_sql_handle
FROM sys.dm_exec_connections
CROSS APPLY sys.dm_exec_sql_text(most_recent_sql_handle)
WHERE session_id = (@@spid))

---

我唯一想到的是使用扩展事件，但我不确定它是否适用。如果只需要执行时间，那么可以通过声明一个

变量来获得它，并在开始执行之前和完成语句之后使用
datediff
使用
datetime
差异来计算它。或者您可以使用此
DMV
sys.dm\u exec\u query\u stats
.Hi@ArunGairola，我已经在做了（关于
DATEDIFF（）
）。但是看看sys.dm\u exec\u query\u stats

看起来很有希望。如何将此

DMV

中的行连接到实际的过程执行？您可以使用当前会话的

sql句柄使用sys.dm\u exec\u query\u stats

中的

选择总已用时间`我将尝试这样做，谢谢！这看起来和我一直在寻找的差不多，我将玩弄这个查询以获得所需的输出，非常感谢您的帮助！
SELECT total_elapsed_time
FROM sys.dm_exec_query_stats 
WHERE sql_handle in (SELECT most_recent_sql_handle
FROM sys.dm_exec_connections
CROSS APPLY sys.dm_exec_sql_text(most_recent_sql_handle)
WHERE session_id = (@@spid))