Porting PostgreSQL trigger to SQL Server 2008

Question

I have to port a PostgreSQL trigger but since I don't have much experience on that I don't know how to change some parts. The original trigger is:

CREATE TRIGGER aerolinea_tr
AFTER UPDATE
ON public.aerolinea FOR EACH ROW
EXECUTE PROCEDURE public."actualizaWarehoseTemplate"();

DECLARE
  mviews RECORD;
BEGIN
  IF (TG_OP = 'UPDATE') THEN
    FOR mviews  IN SELECT DISTINCT template.idtemplate
                    FROM template
                    INNER JOIN vueloaerolinea ON (template.idvueloaerolinea = vueloaerolinea.idvueloaerolinea)
                    WHERE vueloaerolinea.codigolinea = old.codigolinea
    LOOP
         UPDATE detalletemplate SET idwarehose = new.idwarehouse WHERE detalletemplate.idtemplate = mviews.idtemplate;
    END LOOP;
  END IF;
  RETURN old;
END;

And what I have done is:

CREATE TRIGGER aerolinea_tr
ON aerolinea
AFTER UPDATE
AS
BEGIN
  -- if no row affected, the trigger ends.
  IF @@ROWCOUNT = 0
  BEGIN
    RETURN;
  END;

  IF EXISTS(SELECT * FROM inserted)
  BEGIN
    IF EXISTS(SELECT * FROM deleted)
    BEGIN
      --Update code goes here.
    END
  END
END;

But I can't find an equivalent to RECORD for SQL Server and I don't know how to do that part.

Answer 1

Looks like you need to use a cursor . You can try something like this -- it's not complete because I don't know the table schema of the aerolinea table, but nonetheless, should get you going in the right direction:

DECLARE @idtemplate INT //Assuming this is an int
DECLARE @mviews CURSOR
DECLARE @newidwarehouse INT

SELECT @newidwarehouse = idwarehouse FROM INSERTED

SET @mviews = CURSOR FOR
SELECT DISTINCT template.idtemplate
FROM template
    INNER JOIN vueloaerolinea ON (template.idvueloaerolinea = vueloaerolinea.idvueloaerolinea)
    INNER JOIN DELETED ON DELETED.codigolinea = vueloaerolinea.codigolinea

OPEN @mviews 
FETCH NEXT
FROM @mviews INTO @idtemplate 
WHILE @@FETCH_STATUS = 0
BEGIN
    UPDATE detalletemplate
    SET idwarehose = @newidwarehouse 
    WHERE detalletemplate.idtemplate = @idtemplate 
FETCH NEXT
FROM @mviews INTO @idtemplate 
END
CLOSE @mviews 
DEALLOCATE @mviews 

BTW, you don't need to check for Inserted and Deleted when checking for Updates. You can just check for Deleted:

IF EXISTS (SELECT * FROM DELETED)