SQL INSERT触发器的问题

如何解决SQL INSERT触发器的问题

伙计们长期潜伏在第一次的海报上。我正在为此触发器寻求帮助，以尝试上班。我看过类似的文章，但没有一个真的适合我的尝试。所以我向你们寻求帮助。

基本上这是我正在尝试做的事情。我们有DMS软件，它可以写入数据库，并且要在特定插入值上触发触发器。

这是将被处理的插入语句的示例。

INSERT INTO DOCSADM.ACTIVITYLOG (CR_IN_USE,ACTIVITY_DESC,BILLED_ON,BILLABLE,PAGES,KEYSTROKES,TYPE_TIME,ELAPSED_TIME,TYPIST,AUTHOR,START_DATE,ACTIVITY_TYPE,REF_DOCUMENT,REF_LIBRARY,APPLICATION,VERSION_LABEL,DOCNUMBER,SYSTEM_ID) 
VALUES ('','DOCSFusion','1753-01-01','',1920,'2020-08-26T10:17:56',**115**,-1,1173,75,3252)

但是我只希望在插入语句中的粗体部分看到值115时触发触发器。（Activity_type值）

对于不是115的所有其他值，我什么也不想做。

这是我到目前为止所拥有的：

CREATE TRIGGER BW_TRIGGER
   ON  DOCSADM.ACTIVITYLOG
   AFTER INSERT
AS 
BEGIN
       -- SET NOCOUNT ON added to prevent extra result sets from
       -- interfering with SELECT statements.
       SET NOCOUNT ON;

--Declare some variable and set it as a value of 115.
--Example:
DECLARE @AlogType int = (SELECT I.ACTIVITY_TYPE FROM DOCSADM.ACTIVITYLOG A,INSERTED I) --This is the value you are looking for regarding the DM client/Matter actitivty type.
DECLARE @AlogDesc varchar(32) = (Select i.ACTIVITY_DESC from docsadm.ACTIVITYLOG A,INSERTED I) 

--Next,you should have a fork or path in your trigger to determine how it proceeds.
--Path 1: The @AlogType value matches the inserted value so you want to process the rest of the trigger.  Example path – “ProcessTrigger:”
--Path 2: The @AlogType value does NOT match the inserted value,you want to exit the trigger.  Example Path – “ExitTrigger:”


IF @AlogType <> 115 
GOTO TriggerExit;
ELSE

Begin

/*Create first temp table to collect insert values*/  --This table will have the SysID Value and the corresponding docnumber for the items you want.  
--You can add whatever other values you think you need.
CREATE TABLE #TempSet1
(
AlogsysID INT,Docnum INT,AlogDate Varchar(64),AlogTypist INT,AlogAuthor INT,AlogDesc varchar(32),ALOGVER varchar(10),ALOG_MATTER INT
)


INSERT INTO #TempSet1 (AlogsysID,Docnum,AlogDate,AlogTypist,AlogAuthor,ALOG_MATTER)
--SELECT  You SELECT STATEMENT WILL GO HERE MODIFIED TO POPULATE THE TABLE WITH THE DOCNUMBERS YOU WANT!!
select top 1 System_id,docnumber,LAST_ACCESS_DATE,MATTER from docsadm.PROFILE where EXISTS  (SELECT CLIENT.SYSTEM_ID FROM DOCSADM.CLIENT  INNER JOIN DOCSADM.MATTER ON MATTER.CLIENT_ID = CLIENT.SYSTEM_ID  
WHERE MATTER.SYSTEM_ID =@AlogDesc  OR  INH_LUP_SEC_FROM IS NULL OR INH_LUP_SEC_FROM = 0) AND MATTER=@AlogDesc


/*Set variable @SysID as the LASTKEY value -1.  This will be used to set the SysID column on the #TempSet table*/ 
--DECLARE @SysID INT = (SELECT LASTKEY FROM DOCSADM.SEQ_SYSTEMKEY) -1;

/*Set the SysID value for every row on the #TempSet1 table as the @SysID variable +1*/
--UPDATE #TempSet1
--SET @SysID = AlogsysID = @SysID + 1

--Your #TempSet should now be set with ALL of the System_IDs and Docnumbers necessary for your insert!!!!—

--Verify this by doing a select against the #TempSet1 Table
SELECT * FROM #TempSet1;

--Next you need to set the SystemID to the correct value for future processing.  To do this,we need to get a total count from the #TempSet table.
/*Set a variable to update the NEXTKEY value on the DOCSADM.SEQ_SYSTEMKEY table.  The NEXTKEY value is used for the SYSTEM_ID field*/
--DECLARE @SeqUpdateCount INT = (SELECT COUNT(*) FROM #TempSet1);

/*Update the LASTKEY Value on the SEQ_SYSTEMKEY table to the next available value for DM.*/
--UPDATE DOCSADM.SEQ_SYSTEMKEY SET LASTKEY = LASTKEY+@SeqUpdateCount

--If you have all the values you need in your temp table,you can now insert them into the ACTIVITYLOG table.

--INSERT INTO DOCSADM.ACTIVITY 
--(SYSTEM_ID,version,EXT,)
--SELECT 
--AlogSysID,GETUTCDATE(),BLAH,BLAH
--FROM #TableSet1


INSERT INTO DOCSADM.ACTIVITYLOG 
(SYSTEM_ID,ACTIVITY_TYPE)
SELECT 
AlogsysID,ALOG_MATTER,115
FROM #TempSet1;

--Now you need to Drop the Temp Table
DROP TABLE #TempSet1

--Go to the other half of your path above to exit the trigger.

END


 TriggerExit:


END
Go

但是当我尝试在此表上运行任何insert语句时，会收到此错误消息。 activity_type的值是否为115都没有关系

Subquery returned more than 1 value. This is not permitted when the subquery follows =,!=,<,<=,>,>= or when the subquery is used as an expression.

我知道问题出在触发器的这一部分：

INSERT INTO #TempSet1 (AlogsysID,ALOG_MATTER)
--SELECT  You SELECT STATEMENT WILL GO HERE MODIFIED TO POPULATE THE TABLE WITH THE DOCNUMBERS YOU WANT!!
SELECT TOP 1 
System_id,MATTER 
FROM docsadm.PROFILE 
WHERE EXISTS  (SELECT CLIENT.SYSTEM_ID 
               FROM DOCSADM.CLIENT  
               INNER JOIN DOCSADM.MATTER 
                     ON MATTER.CLIENT_ID = CLIENT.SYSTEM_ID  
               WHERE MATTER.SYSTEM_ID =@AlogDesc  
                     OR  INH_LUP_SEC_FROM IS NULL 
                     OR INH_LUP_SEC_FROM = 0)
      AND MATTER=@AlogDesc

执行导致失败的选择语句。我知道该语句将带回多行，但我只需要其中之一的值，这样我就可以将此值用于插入。我虽然拥有“ select top 1”将为我做到这一点，但它并不像我认为的那样起作用。我想念什么？任何帮助将不胜感激。

解决方法

如果我不得不猜测我会说你的问题在这里：

DECLARE @AlogType int = (SELECT I.ACTIVITY_TYPE FROM DOCSADM.ACTIVITYLOG A,INSERTED I) --This is the value you are looking for regarding the DM client/Matter actitivty type.
DECLARE @AlogDesc varchar(32) = (Select i.ACTIVITY_DESC from docsadm.ACTIVITYLOG A,INSERTED I)

上面的ACTIVITYLOG和INSERTED如何加入？没有CROSS JOIN的位置。为什么甚至将ACTIVITYLOG拖到其中，也可以简单地使用INSERTED。另外，请尝试停止使用隐式联接（我可以看到在脚本的后面，您使用了正确的，更详细的联接语法）

尝试：

DECLARE @AlogType int = (SELECT I.ACTIVITY_TYPE FROM INSERTED I) --This is the value you are looking for regarding the DM client/Matter actitivty type.
DECLARE @AlogDesc varchar(32) = (Select i.ACTIVITY_DESC from INSERTED I)

请注意，这仅适用于单个刀片。批量插入时，INSERTED是一个包含多行的表，您将再次遇到问题。

SQL INSERT触发器的问题

如何解决SQL INSERT触发器的问题

解决方法

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