Skip to main content

SQL Server–Export varbinary column to disk

At one of my customers we store files in the database in varbinary(max) columns. To debug an issue we wanted to read out the files.

Of course we could create a small program to do this, but we wanted to do it directly from the SQL Server Management Studio.

We created a small database script that uses OLE Automation procedures:

To use this script for your own purposes, replace the query after the cursor creation:

DECLARE FILEPATH CURSOR FAST_FORWARD FOR <Add your own SELECT query here>

The first time that we executed this script, it failed with the following error messages:

Msg 15281, Level 16, State 1, Procedure sp_OACreate, Line 1 [Batch Start Line 0]

SQL Server blocked access to procedure 'sys.sp_OACreate' of component 'Ole Automation Procedures' because this component is turned off as part of the security configuration for this server. A system administrator can enable the use of 'Ole Automation Procedures' by using sp_configure. For more information about enabling 'Ole Automation Procedures', search for 'Ole Automation Procedures' in SQL Server Books Online.

Msg 15281, Level 16, State 1, Procedure sp_OASetProperty, Line 1 [Batch Start Line 0]

SQL Server blocked access to procedure 'sys.sp_OASetProperty' of component 'Ole Automation Procedures' because this component is turned off as part of the security configuration for this server. A system administrator can enable the use of 'Ole Automation Procedures' by using sp_configure. For more information about enabling 'Ole Automation Procedures', search for 'Ole Automation Procedures' in SQL Server Books Online.

Msg 15281, Level 16, State 1, Procedure sp_OAMethod, Line 1 [Batch Start Line 0]

SQL Server blocked access to procedure 'sys.sp_OAMethod' of component 'Ole Automation Procedures' because this component is turned off as part of the security configuration for this server. A system administrator can enable the use of 'Ole Automation Procedures' by using sp_configure. For more information about enabling 'Ole Automation Procedures', search for 'Ole Automation Procedures' in SQL Server Books Online.

SQL Server blocked access to procedure 'sys.sp_OADestroy' of component 'Ole Automation Procedures' because this component is turned off as part of the security configuration for this server. A system administrator can enable the use of 'Ole Automation Procedures' by using sp_configure. For more information about enabling 'Ole Automation Procedures', search for 'Ole Automation Procedures' in SQL Server Books Online.

The reason it failed because Ole Automation was disabled. To fix it, we had to enable this feature at the database configuration level. Right click on the database instance in SQL Server Management Studios and select Facets.

There select the Server Configuration section from the Facets dropdown and set the OleAutomationEnabled property to true:

 


Important: the files are written to the specified path on the database server(!).

Labels:

Popular posts from this blog

DevToys–A swiss army knife for developers

As a developer there are a lot of small tasks you need to do as part of your coding, debugging and testing activities.  DevToys is an offline windows app that tries to help you with these tasks. Instead of using different websites you get a fully offline experience offering help for a large list of tasks. Many tools are available. Here is the current list: Converters JSON <> YAML Timestamp Number Base Cron Parser Encoders / Decoders HTML URL Base64 Text & Image GZip JWT Decoder Formatters JSON SQL XML Generators Hash (MD5, SHA1, SHA256, SHA512) UUID 1 and 4 Lorem Ipsum Checksum Text Escape / Unescape Inspector & Case Converter Regex Tester Text Comparer XML Validator Markdown Preview Graphic Color B
Read more

Help! I accidently enabled HSTS–on localhost

I ran into an issue after accidently enabling HSTS for a website on localhost. This was not an issue for the original website that was running in IIS and had a certificate configured. But when I tried to run an Angular app a little bit later on http://localhost:4200 the browser redirected me immediately to https://localhost . Whoops! That was not what I wanted in this case. To fix it, you need to go the network settings of your browser, there are available at: chrome://net-internals/#hsts edge://net-internals/#hsts brave://net-internals/#hsts Enter ‘localhost’ in the domain textbox under the Delete domain security policies section and hit Delete . That should do the trick…
Read more

Azure DevOps/ GitHub emoji

I’m really bad at remembering emoji’s. So here is cheat sheet with all emoji’s that can be used in tools that support the github emoji markdown markup: All credits go to rcaviers who created this list.
Read more