DDL triggers are a fantastic way to prvent DDL events in a production database. In the following database triggers, you prevent any type of DDL event, like altering a sproc in production. If a statement is issued, the statement is logged, rolled back and a user receives a message. Databae triggers can be raised at nearly any level. The below example captures any database-level event. There are also server DDL triggers that captures server events like creating logins or changing the configuration of a database.
SET
ANSI_NULLSONSETQUOTED_IDENTIFIERON
GO
CREATE
TRIGGER PreventDDLONDATABASE
FOR DDL_DATABASE_LEVEL_EVENTS
AS
DECLARE @data XML;
DECLARE @schema sysname;
DECLARE @object sysname;
DECLARE @eventType sysname;
SET @data = EVENTDATA()
SET @eventType = @data.value('(/EVENT_INSTANCE/EventType)[1]','sysname');
SET @schema = @data.value('(/EVENT_INSTANCE/SchemaName)[1]','sysname');
SET @object = @data.value('(/EVENT_INSTANCE/ObjectName)[1]','sysname')
INSERT [dbo].[DatabaseLog]
([PostTime],
[DatabaseUser],
[Event],
[Schema],
[Object],
[TSQL],
[XmlEvent])
VALUES
(GETDATE(),CONVERT(sysname,CURRENT_USER), @eventType,
CONVERT(sysname, @schema),CONVERT(sysname, @object),
@data.value('(/EVENT_INSTANCE/TSQLCommand)[1]','nvarchar(max)'),
@data)
ROLLBACK
-- Brian Knight
