Re: [rules-users] Guvnor, database and rule language

First off, the query should be: from Customers where TN = :tn and balance > 0 And that would be only if you mapped the tn property to the name "TN". HQL queries are case sensitive when it comes to property names: http://www.hibernate.org/hib_docs/v3/reference/en-US/html_single/#queryhq... Second, I don't know if that whole "hibernateSession.createQuery" expression would compile in a DRL file. Have you tried it? Anyone? Finally, this rule will fire for every Customer in working memory and look up a matching Customer in the database. Seems a bit inneficient, especially if you have many rules of this type. Would it be possible to load the Customer from the database and just insert it into working memory with it's "balance" property already set? That would be far simpler. Then the rule would be: global org.hibernate.Session hibernateSession; when cust1:Customer(balance > 0) then cust1.setIsAllowed(false); hibernateSession.save(cust1); end (Ignoring the transaction management, here.) You could even skip the save() on the hibernate session in the rule action. You could keep the hibernate session open and save the Customers when you've completed all changes.