Question

原谅我，我很少使用大型SQL Server存储过程，但我遇到了以下存储过程的问题。

基本上我正在尝试使用包含联合的手动运行查询并将其放入带有游标的存储过程中，并将结果返回到临时表中。但是，我收到一个错误，即临时表无法创建，因为它“已经存在”（我已经检查它是否确实存在，但它没有）或者我没有权限（我这样做是因为我以SQL管理员身份登录）。到底是我做错了什么？

我运行了以下查询以查看它是否确实存在于tempdb和创建存储过程的位置，并返回else语句：

IF OBJECT_ID('IPAM..#tempschedule') IS NOT NULL
BEGIN
    PRINT '#temp exists!'
END
ELSE
BEGIN
    PRINT '#temp does not exist!'
END

这是我想要改变的存储过程：

ALTER PROCEDURE lakearrowhead_schedule_python
AS
    IF OBJECT_ID('tempdb..#tempschedule') IS NOT NULL
    BEGIN
        DROP TABLE #tempschedule;
    END;

    CREATE TABLE #tempschedule
    (
        ProgramID INT,
        ItemID INT,
        Day SMALLINT,
        [Date] DATE,
        [Begin TIME] VARCHAR(15),
        [End TIME] VARCHAR(15),
        TIMESLOT NVARCHAR(11),
        SLOTTYPE INT,
        SlotTypeDescription NVARCHAR(64),
        SLOTINFO INT,
        SlotInfoDescription NVARCHAR(500),
        TalkID INT,
        Talk NVARCHAR(50),
        FIRSTNAME NVARCHAR(20),
        LASTNAME NVARCHAR(50),
        INSTITUTION NVARCHAR(150),
        AUTHORLINE NVARCHAR(384),
        TITLE NVARCHAR(256),
        Abstract VARCHAR(1),
        [LOCATION] INT,
        ADDENDUM TEXT,
        EventName NVARCHAR(256)
    );

    DECLARE @pid INT;

    DECLARE PROGRAM_cursor CURSOR FOR
        SELECT TOP 3 WebEvents.EventID
        FROM WebEvents
        INNER JOIN dbo.WebPrograms ON dbo.WebEvents.EventID = dbo.WebPrograms.ProgramID
        WHERE EventLocation = 1004
          AND (eventstartdate >= GETDATE())
        ORDER BY 
            eventstartdate, ProgramCode;

    OPEN PROGRAM_cursor;

    FETCH NEXT FROM PROGRAM_cursor INTO @pid;

    WHILE @@FETCH_STATUS = 0
    BEGIN
        SELECT *
        INTO #tempschedule
        FROM 
            (SELECT 
                 WS.ProgramID ,
                 WS.ItemID ,
                 WS.Day ,
                 CASE DATEPART(WEEKDAY, DATEADD(DAY, WS.Day - 1, WE.eventstartdate))
                     WHEN 1 THEN 'Sun'
                     WHEN 2 THEN 'Mon'
                     WHEN 3 THEN 'Tue'
                     WHEN 4 THEN 'Wed'
                     WHEN 5 THEN 'Thu'
                     WHEN 6 THEN 'Fri'
                     WHEN 7 THEN 'Sat'
                     ELSE 'N/A'
                 END + ' ' + CONVERT(CHAR(12), DATEADD(DAY, WS.Day - 1, WE.eventstartdate), 101) AS Date,
                 CONVERT(VARCHAR(15), CONVERT(TIME, SUBSTRING(WS.TimeSlot, 0, 6)), 100) AS 'Begin TIME',
                 CONVERT(VARCHAR(15), CONVERT(TIME, SUBSTRING(WS.TimeSlot, 7, 6)), 100) AS 'End TIME',
                 WS.TimeSlot,
                 WS.SlotType,
                 WSSTC.Description AS SlotTypeDescription,
                 WS.SlotInfo,
                 WSSIC.Description AS SlotInfoDescription,
                 ISNULL(WSI.TalkID, 0) AS TalkID,
                 LEFT(WPI.FirstName, 10) + ' '
                     + LEFT(WPI.LastName, 10) + ' ('
                     + LEFT(WEA.institution, 10) + ')' + ' - '
                     + LEFT(WSI.Title, 10) + '...'
                     + RIGHT(WSI.Title, 10) AS Talk,
                 WPI.FirstName,
                 WPI.LastName,
                 WEA.institution,
                 WSI.AuthorLine,
                 WSI.Title,
                 LEFT(WSI.Abstract, 1) AS Abstract,
                 WS.Location,
                 WS.Addendum,
                 WE.EventName
             FROM   
                 dbo.WebSpeakerInfo WSI
             INNER JOIN 
                 dbo.WebPersonalInfo WPI ON WSI.UserID = WPI.UserID
             INNER JOIN 
                 dbo.webeventaffiliation WEA ON WPI.UserID = WEA.userid
                                             AND WEA.eventid = @pid
             RIGHT OUTER JOIN 
                 dbo.WebScheduleSlotTypeCodes WSSTC 
             RIGHT OUTER JOIN 
                 dbo.WebSchedules WS ON WSSTC.SlotType = WS.SlotType 
                 ON WSI.TalkID = WS.TalkID
             LEFT OUTER JOIN 
                 dbo.WebScheduleSlotInfoCodes WSSIC ON WS.SlotInfo = WSSIC.SlotInfo
             INNER JOIN 
                 dbo.WebEvents WE ON WE.EventID = @pid
             WHERE  
                 WS.ProgramID = @pid
                 AND WS.SlotType <> 6 ) AS x
            ORDER BY 
                 Day, TimeSlot;

        FETCH NEXT FROM PROGRAM_cursor INTO @pid;
    END;

    CLOSE PROGRAM_cursor;
    DEALLOCATE PROGRAM_cursor;

    SELECT *
    FROM #tempschedule;

    DROP TABLE #tempschedule;

Answer 1

运行ALTER语句时，您将把存储过程转换为以下语句：

ALTER PROCEDURE lakearrowhead_schedule_python
AS
    IF OBJECT_ID('tempdb..#tempschedule') IS NOT NULL
        BEGIN
            DROP TABLE #tempschedule;
        END;

其余的陈述只是在ALTER之后执行。

故事的道德？始终使用BEGIN / END块来存储过程，函数和触发器。

我应该注意，当存储过程结束时，会自动删除临时表。通过使用表变量，您可以更加确定。这些都被删除并超出范围。因此，在存储过程的主体内不需要显式删除临时表。

无法创建SQL Server临时表但不存在

1 个答案: