Firing trigger for bulk insert

Question

ALTER TRIGGER [dbo].[TR_O_SALESMAN_INS]
   ON  [dbo].[O_SALESMAN]
   AFTER INSERT
AS 
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- inte         


        

Answer 1

you can use a cursor as follows:

create trigger trg_insertstuff
on [O_SALESMAN]
after insert
as

  DECLARE @SLSMAN_CD NVARCHAR(20)
    DECLARE @SLSMAN_NAME NVARCHAR(20)


 declare db_cursor CURSOR FOR  
SELECT SLSMAN_CD, SLSMAN_NAME
from inserted

OPEN db_cursor  
FETCH NEXT FROM db_cursor INTO @SLSMAN_CD , @SLSMAN_NAME 

WHILE @@FETCH_STATUS = 0  
BEGIN  

IF NOT EXISTS(SELECT * FROM O_SALESMAN_USER WHERE SLSMAN_CD = @SLSMAN_CD)
    BEGIN
        INSERT INTO O_SALESMAN_USER(SLSMAN_CD, PASSWORD, USER_CD)
        VALUES(@SLSMAN_CD, @SLSMAN_CD,@SLSMAN_NAME )
    END


FETCH NEXT FROM db_cursor INTO  @SLSMAN_CD , @SLSMAN_NAME 
end

CLOSE db_cursor  
DEALLOCATE db_cursor

Answer 2

Yes, triggers fire once per statement, not once per row.

So you need something like:

SET NOCOUNT ON

INSERT INTO O_SALESMAN_USER(SLSMAN_CD, PASSWORD, USER_CD)
SELECT
    i.SLSMAN_CD,i.SLSMAN_CD,i.SLSMAN_NAME
FROM
    inserted i
        left join
    O_SALESMAN_USER u
        on
            i.SLSMAN_CD = u.SLSMAN_CD
where
    u.SLSMAN_CD is NULL

Answer 3

My scenerio is, (Table Names: Stock, StockLog)

I am inserting bulk rows inside Stock table through a Stored Procedure and want to also have all these rows inside StockLog table

first i was doing same as you (by variables) inside my insert trigger for Stock table but getting error because by using

DECLARE @StocklId bigint

SET @StocklId = (SELECT StocklId FROM inserted)

i was having multiple values by (SELECT StocklId FROM inserted) as i was inserting multiple rows, then i remove all variables, and now i am doing this

INSERT INTO StockLog(StocklId,PharmacyId,TransactionDetailId,ProductId,TotalQty,ReservedQty,AvailableQty,strUserName,strTerminalName,strVer)

SELECT StocklId, PharmacyId, TransactionDetailId, ProductId, TotalQty, 0, AvailableQty,strUserName, strTerminalName, strVer FROM inserted

and now everything is fine