[external] Removing binary content of deleted attachments

External content by Daniel Krüger; May 16, 2026;
The original post has appeared on daniels-notes.de

Deleting an attachment in WEBCON BPS through the portal or an automation only flags the record as deleted. The binary content remains in the database, consuming disk space and staying accessible through the workflow history. There is no built-in mechanism to clean this up:

Delete attachments with binary data

The functionality to remove binary data of deleted attachments is in backlog and I hope it will be implemented sooner than later. As a workaround, advanced users may want to manually update ATF_Value to empty string or change ATT_IsDeleted to 0 and then execute an action again.

This post provides two SQL based cleanup scripts:

1. A single script for targeted cleanups / test databases
2. A batch processing approach for large production environments 

You can read all the details in this blog post.