Merge statement and trigger SQL Server 2012 - sql-server

Question

I have a merge statement supposed to execute a trigger multiple times.
I first thought my trigger wasn't executing, but with some research I found that triggers are only triggered once per statement (a trigger being one statement).
But all the posts out there are old and I thought that there might be a simple way now to make my trigger execute multiple times.
So is there anything I can add to my trigger or my merge statement to make my trigger do so?
Thanks
TRIGGER
TRIGGER [dbo].[Sofi_TERA_Trigger]
ON [dbo].[ZZ]
AFTER INSERT,UPDATE
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
IF EXISTS(SELECT 1 FROM inserted WHERE inserted.Statut LIKE '%CLOT%' OR inserted.Statut LIKE '%CLTT%' OR inserted.Statut LIKE '%CONF%')
BEGIN
DECLARE #Id int;
DECLARE #Matricule varchar(10);
DECLARE #IdAction int;
DECLARE #NumeroOF int;
SELECT #NumeroOF = inserted.Ordre from inserted;
DECLARE OF_CURSOR CURSOR
LOCAL STATIC READ_ONLY FORWARD_ONLY
FOR
SELECT Id,Log.Matricule,IdAction from Log inner join (select max(Id) as maxID,Matricule from LOG where Log.NumeroOF = #NumeroOF group by Matricule) maxID
on maxID.maxID = Log.Id where Log.NumeroOF = #NumeroOF;
OPEN OF_CURSOR
FETCH NEXT FROM OF_CURSOR INTO #Id,#Matricule,#IdAction
WHILE ##FETCH_STATUS = 0
BEGIN
IF #IdAction!=13
BEGIN
IF #IdAction<=2
BEGIN
insert into Log(NumeroOF,Matricule,IdAction,Date,EstAdmin) values (#NumeroOF,#Matricule,13,GETDATE(),1);
END
ELSE
BEGIN
insert into Log(NumeroOF,Matricule,IdAction,Date,EstAdmin) values (#NumeroOF,#Matricule,2,GETDATE(),1);
insert into Log(NumeroOF,Matricule,IdAction,Date,EstAdmin) values (#NumeroOF,#Matricule,13,GETDATE(),1);
END
END
FETCH NEXT FROM OF_CURSOR INTO #Id,#Matricule,#IdAction
END
CLOSE OF_CURSOR;
DEALLOCATE OF_CURSOR;
END
END
MERGE STATEMENT
Merge ZZ AS TARGET USING ZZTemp AS SOURCE
ON (Target.Operation=Source.Operation AND Target.Ordre=Source.Ordre)
WHEN MATCHED THEN
UPDATE SET TARGET.DateTERA=SOURCE.DateTERA, TARGET.MatTERA=SOURCE.MatTERA, TARGET.MatTERC=SOURCE.MatTERC
WHEN NOT MATCHED THEN
INSERT(Operation,Ordre,ElementOTP,Article,DesignationOF,PosteTravail,ValeurTemps,DHT,Statut,StatutOF,TexteActivite,DateTERA,MatTERA,MatTERC,StatutMat)
VALUES(SOURCE.Operation,SOURCE.Ordre,SOURCE.ElementOTP,SOURCE.Article,SOURCE.DesignationOF,SOURCE.PosteTravail,SOURCE.ValeurTemps,SOURCE.DHT,
SOURCE.Statut,SOURCE.StatutOF,SOURCE.TexteActivite,SOURCE.DateTERA,SOURCE.MatTERA,SOURCE.MatTERC,SOURCE.StatutMat);

Answer 1

Your problem is the cursor is incorrectly written to handle sets of data. Any trigger setting a value form inserted or deleted to a scalar variable is incorrect and for reasons of data integrity MUST be rewritten. This trigger is buggy. Period. There is no getting around that it must be rewritten (and any others that use the same technique).
The code inside your trigger should be something like:
INSERT INTO Log(NumeroOF,Matricule,IdAction,Date,EstAdmin)
SELECT max(Id),l.Matricule,l.IdAction, 13,GETDATE(),1
FROM Log l
JOIN Inserted i ON l.NumeroOF = i.Ordre
WHERE i.Statut LIKE '%CLOT%' OR i.Statut LIKE '%CLTT%' OR i.Statut LIKE '%CONF%'
GROUP BY l.Matricule,l.IdAction
INSERT INTO Log(NumeroOF,Matricule,IdAction,Date,EstAdmin)
SELECT max(Id),l.Matricule,l.IdAction, 2,GETDATE(),1
FROM Log l
JOIN Inserted i ON l.NumeroOF = i.Ordre
WHERE IdAction<=2
WHERE i.Statut LIKE '%CLOT%' OR i.Statut LIKE '%CLTT%' OR i.Statut LIKE '%CONF%'
GROUP BY l.Matricule,l.IdAction
Make sure to test with both single record and multiple record inserts as all triggers should be tested. Then try your MERGE once you are confident the trigger is correct.