Darn, just when I decided to announce my port of the monetdb-ruby-sql gem to xquery, you release a fix of your own :P Anyway it's here:
http://github.com/d-snp/ruby-monetdb-xquery
There's still some differences between the official one and mine, I think mine handles errors a bit more gracefully, but it could be I missed something. I will look at the other changes as soon as possible to see if mine has any odd behaviour.
In the following weeks I will be working on making XQuery and MonetDB work on DataMapper (since DataMapper is a nicer framework than ActiveRecord, and also ActiveRecord depends heavily on SQL) If anyone has any comments on this or any questions or would like to help out then please let me hear. I plan on putting the datamapper implementation on github too somewhere this week.
Kind regards, Tinco Andringa