Any tickets I'm interested in/working start my geting assigned to me. Next I mark then (add comment) with enqueue_xxx to keep in a bucket where can see all unresolved I'm working regardless of current assignee. Problem is search for new tickets assigned to me not in 'bucket'. Have to pull all in bucket and manually compare all assigned to me (many in bucket may be assigned to me at point in time ...).
text ~ enqueue_xxx -- work great
text !~ enqueue_jd -- != invalid operator for type text