Raising Errors in Transact-Sql

There seems to be quite a bit of confusion about the way errors should be raised in newer versions of Transact-Sql. The documentation for RAISERROR says: “New applications should use THROW instead.” It doesn’t say that RAISERROR is deprecated; when you look at the list of deprecated features what you find is that invoking RAISERROR […]

Sql Server CONTEXT_INFO with Numeric Values

A trigger takes no arguments but it is possible to use CONTEXT_INFO() to make 128 bytes of binary data values accessible to it. I wanted to provide an 8-byte (bigint) value from a sequence which the trigger would write to a primary key column. Storing and retrieving a numeric value in CONTEXT_INFO is not difficult, […]

Sql Server Identity and Membership Functions

On my current research project I’m looking at security. The number of different functions available (some of which are obsolescent) has always been an irritation, so I decided to create a Transact-Sql query that demonstrates the functions and provides links to the documentation. You can use EXECUTE AS LOGIN or EXECUTE AS USER to explore […]

Agile Continuous Delivery of Databases (3)

A phase of my Agile Blue/Green deployment project is now complete, as I have a Proof of Concept which has been tested successfully. As you may recall from prior posts, the Blue/Green technique features two databases, the “green” live one that users connect to (I’ve made an arbitrary assignment of colours), and the offline “blue” […]