Advanced Search functionality

Are there any plans to support advanced queries that poll fields like file size or state? For instance, let's say I wanted to try to recover only .dbz files with an "Excellent" state and a file size greater than 1024kb, the search query might be:

.dbz size:1024 state:excellent

I apologize if this feature already exists - I could not find documentation on it. Also, is there a way to disable automatic search result updating? Right now, if I have a few million files and need to type a multi-character query into the search box, it tries to update the results listing after every character. This takes an eternity :(