I can see a number of ways to interpret that. There is the module Net::MarkLogic::XDBC if you are using xquery as a means to connect to a Marklogic CIS server. But Perl won't just wake up one day and parse the xquery syntax for you - if that module isn't sufficient we'll have to think of some other idea for how to parse it.

Update: bearing in mind that xquery is of course an XML query language, it might be worth taking a look at the various DBI/XML interfacing modules on offer.