Is there a limit to the characters in a URL that google can pick up?

[mrutkowski]

For instance, if the URL had a long query? When searching in google, there is a limit to the number of characters, but will google still pick up and register the page if the URL is longer than that limit?

[RonPK]

Google does not like session id's in URL's. Rule of thumb is not to make querystrings too long, but I doubt anybody knows for sure how long.