If I append a single new vector, will it show up in search results without me needing to ask for the index to be rebuilt? Can i update an existing vector withou

If I append a single new vector, will it show up in search results without me needing to ask for the index to be rebuilt? Can i update an existing vector without having to ask for the index to be rebuilt? EDIT: from reading the linked article, it seems like newly inserted vectors will be queried using brute force. Very interesting idea!