In which variable are past sparse tree queries saved

Question

I'm executing sparse tree queries programmatically, and I'd like to save the search queries in the same history variable that org-mode uses by default. I'm guessing I can/should do this with add-to-history (described here).

I took a quick look at the code but, being unfamiliar with it, I could not find the right variable.

Does anyone know?

Answer 1

This seems to be the variable org-tags-history, so the following works:

 (add-to-history 'org-tags-history query-string)