using NEWSEQUENTIALID() with UPDATE Trigger
- by Ram
I am adding a new GUID/Uniqueidentifier column to my table.
ALTER TABLE table_name
ADD VersionNumber UNIQUEIDENTIFIER UNIQUE NOT NULL DEFAULT NEWSEQUENTIALID()
GO
And when ever a record is updated in the table, I would want to update this column "VersionNumber". So I create a new trigger
CREATE TRIGGER [DBO].[TR_TABLE_NAMWE]
ON [DBO].[TABLE_NAME]
AFTER UPDATE
AS
BEGIN
UPDATE TABLE_NAME
SET VERSIONNUMBER=NEWSEQUENTIALID()
FROM TABLE_NAME D
JOIN INSERTED I ON D.ID=I.ID/* some ID which is used to join*/
END
GO
But just realized that NEWSEQUENTIALID() can only be used with CREATE TABLE or ALTER TABLE. I got this error
The newsequentialid() built-in function can only be used in a DEFAULT expression for a column of type 'uniqueidentifier' in a CREATE TABLE or ALTER TABLE statement. It cannot be combined with other operators to form a complex scalar expression.
Is there a workaround for this ?
Edit1: Changing NEWSEQUENTIALID() to NEWID() in the trigger solves this, but I am indexing this column and using NEWID() would be sub-optimal
