# File lib/ferret/index.rb, line 413
413:     def query_delete(query)
414:       @dir.synchronize do
415:         ensure_searcher_open()
416:         query = do_process_query(query)
417:         @searcher.search_each(query) do |doc, score|
418:           @reader.delete(doc)
419:         end
420:         flush() if @auto_flush
421:       end
422:     end