SQL Server 2005 - 在多用戶環境中使用臨時表

Question

我在此過程中遇到問題。它使用了幾個臨時表，它會丟棄並重新創建。這導致了大量的崩潰，我只能假設衝突正在發生。

ALTER PROCEDURE [dbo].[AdditionalVisits_SelectByOrigID] 
(
@orig_job_ID int 
) 
as 

if exists (select * from INFORMATION_SCHEMA.TABLES where TABLE_NAME = 'additionalVisitsPodsCnt') 
    drop table additionalVisitsPodsCnt; 

SELECT  CONVERT(bit, COUNT(PODS.podID)) AS cnt, AdditionalVisits.this_job_id, AdditionalVisits.orig_job_id 
INTO   additionalVisitsPodsCnt 
FROM   PODS RIGHT OUTER JOIN 
        AdditionalVisits ON PODS.jobID = AdditionalVisits.this_job_id 
GROUP BY AdditionalVisits.this_job_id, AdditionalVisits.orig_job_id 
HAVING  (AdditionalVisits.orig_job_id = @orig_job_ID) 

if exists (select * from INFORMATION_SCHEMA.TABLES where TABLE_NAME = 'additionalVisitsPhotosCnt') 
drop table additionalVisitsPhotosCnt; 

SELECT  CONVERT(bit, COUNT(Photos.photoID)) AS cnt, AdditionalVisits.this_job_id, AdditionalVisits.orig_job_id 
INTO   additionalVisitsPhotosCnt 
FROM   Photos RIGHT OUTER JOIN 
        AdditionalVisits ON Photos.jobID = AdditionalVisits.this_job_id 
GROUP BY AdditionalVisits.this_job_id, AdditionalVisits.orig_job_id 
HAVING  (AdditionalVisits.orig_job_id = @orig_job_ID) 

SELECT  AdditionalVisits.id, AdditionalVisits.this_job_ID, AdditionalVisits.orig_job_ID, AdditionalVisits.reason, AdditionalVisits.date, ThisJob.Job_Reference_No, 
        ThisJob.Job_POD_Filename, ThisJob.Job_Photo_Filename, ThisJob.Job_Signed_For_Name, ThisJob.Job_Value, ThisJob.Job_Advance_Payment, 
        ThisJob.Job_Eoj_Payment, ThisJob.Job_Status, ThisJob.Job_Date_Added, ThisJob.Job_Start_Date, additionalVisitsPhotosCnt.cnt AS Job_Photo_Supplied, 
        additionalVisitsPodsCnt.cnt AS Job_POD_Supplied 
FROM   AdditionalVisits INNER JOIN 
        Jobs AS ThisJob ON AdditionalVisits.this_job_ID = ThisJob.Job_ID INNER JOIN 
        additionalVisitsPodsCnt ON AdditionalVisits.this_job_ID = additionalVisitsPodsCnt.this_job_id INNER JOIN 
        additionalVisitsPhotosCnt ON AdditionalVisits.this_job_ID = additionalVisitsPhotosCnt.this_job_id 
WHERE  (AdditionalVisits.orig_job_ID = @orig_job_ID) AND (ThisJob.Job_Status <> 7) 

我得到的錯誤如下：

Cannot drop the table 'additionalVisitsPodsCnt', because it does not exist or you do not have permission. There is already an object named 'additionalVisitsPodsCnt' in the database. 

或

Invalid object name 'additionalVisitsPhotosCnt'. 

這些錯誤是間歇性的。有時它只是起作用。

有沒有更好的方法來做到這一點？

Answer 1

當然，如果這個表僅從這一個過程中使用，使用一個「真正的」 local temporary table（在tempdb創建），通過與#前綴表名：

SELECT CONVERT(bit, COUNT(PODS.podID)) AS cnt, 
     AdditionalVisits.this_job_id, AdditionalVisits.orig_job_id 
INTO   #additionalVisitsPodsCnt 
FROM   PODS .... 

這樣，它是從孤立所有其他會話，即使並行呼叫此程序是由其他人做出的。

Answer 2

這是我用於#temp表的正常模式。 （注意「＃」前綴）。

IF OBJECT_ID('tempdb..#TableOne') IS NOT NULL 
begin 
     drop table #TableOne 
end 


CREATE TABLE #TableOne 
( 
SurrogateKey int , 
NameOf varchar(12) 
) 


/* 
Do something with temp table 
*/ 




IF OBJECT_ID('tempdb..#TableOne') IS NOT NULL 
begin 
     drop table #TableOne 
end 

Answer 3

請考慮使用表變量。

This StackOverflow topic解釋它比我會......;）