[Digikam-users] re arranging tags into a new hierarchy - what happens?

[Marcel Wiesweg]

To answer your question "what happens",
looking at the database:

Tag associations are stored in a table
image id -> tag id 

Tags are stored in a table:
tag id
tag name
tag's parent id
tag icon

Moving the tag in the hierarchy changes the field "tag's parent id", but the 
tag id remains unchanged, and the tag associations are not touched.