Permanent URLs for queries (and saving them?)

[larsmans]

In my project, permanent URLs for queries are a requirement. It looks like currently, the URL always stays the same.

There are two options that I see to solve this:

1. encode the query in the URL (as a GET parameter or as part of the path), or
2. save queries in the database and use the DB identifier in the URL. This is a nice feature to have anyway, but I don't know how much work it will be, and the URLs are not really permanent/portable across implementations.