SQL Clone
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Is this a SQL Provision Cloned Database?

As I work with SQL Provision, I keep finding new questions and concerns from clients and customers. Recently I had someone wonder if we could determine whether or not a database on which they were working was a SQL Clone cloned copy.

You can, and it’s easy to check. When SQL Clone creates a database, it will use the base image, and ensure there is an extended property set on the database itself.

The function sys.fn_listextendedproperty() is used to return the database extended properties. We can use the DEFAULT keyword for the various parameters, like this:

SELECT objtype ,
        objname ,
        name ,

This gives me an empty result set on a non-SQL Clone database if I have no extended properties set. If I had others set, I might get some result. For a database I’ve setup with SQL Provision, I’ll get this:

2018-07-02 17_02_58-SQLQuery1.sql - (local)_SQL2016.StackOverFlow (PLATO_Steve (69))_ - Microsoft SQ

For the most part, I don’t care that I’m using a clone rather than a native SQL Server database, but there could be places I do care, and certainly I want to filter out this extended property from my version control system.

SQL Provision is a great tool for rapidly giving new environments to developers without the hassles of restoring copies and using lots of storage space. If you want to give it a try, download an evaluation today.

The Voice of the DBA

Steve Jones is the editor of SQLServerCentral.com and visits a wide variety of data related topics in his daily editorial. Steve has spent years working as a DBA and general purpose Windows administrator, primarily working with SQL Server since it was ported from Sybase in 1990. You can follow Steve on Twitter at twitter.com/way0utwest


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