Question

This trigger:

ALTER TRIGGER InsteadTrigger on CustomerView
INSTEAD OF INSERT
AS
BEGIN
    SET NOCOUNT ON;

    INSERT INTO Person
        SELECT FirstName, LastName
        FROM inserted

Causes this query to return null.

INSERT INTO CustomerView (FirstName, LastName) Values ('Jonathan', 'Allen')
SELECT SCOPE_IDENTITY()

Is there a way to fix the trigger so that SCOPE_IDENTITY will return the correct value? (I can’t use @@IDENTITY because there may be other triggers on the table involved.)

Answer 1

No I don’t think this is possible.

You can return it from the trigger itself of course.

ALTER TRIGGER InsteadTrigger on CustomerView
INSTEAD OF INSERT
AS
BEGIN
    SET NOCOUNT ON;

    INSERT INTO Person
        SELECT FirstName, LastName
        FROM inserted

        SELECT SCOPE_IDENTITY() AS PersonId
END

And you can use CONTEXT_INFO to suppress the result set except for when you require it.

Using the OUTPUT clause doesn’t work in this context as discussed in this Microsoft Connect Item it is evaluated before the insert into the main table and so before the IDENTITY function is called.