I think that Zoltan wrote: >>I am trying to use a defquery in RHS of a rule, but for some >>reason it returns an empty iterator only... What could be the reason?
Hi Zoltan, I looked at your code, and the main problem that I see is the line: (bind ?it (run-query find-threshold '?eventSource')) ;; this won't find anything! :-D You are passing the argument to the (defquery find-threshold) as a string and not a variable as expected. Also, have you defined deftemplates elsewhere for the RawEvent and BaseServiceObject facts? In your rule as coded, Jess complains that these are ordered facts, and it doesn't like that you've added slots to them. BTW - One thing that I learned early was that defqueries, while powerful, can be easily abused. If I found myself wanting to procedurally iterate over a collection of facts rather than let a rule pick them off one by one, then I was usually violating my Zen of Jess http://herzberg.ca.sandia.gov/jess/zen.shtml . I suspect that Ernest will ask you, "Why aren't you letting the rule do this for you?". So, if you have to do it this way, I'd suggest wrapping it in a function call rather than cram all that code into the RHS of your rule. I poked around with this but quickly realized that I can't offer you any meaningful working code unless I know more about your deftemplates and what your application is supposed to do. Hope this all helps! Cheers, Jason ------------------------ Jason Morris Morris Technical Solutions [EMAIL PROTECTED] www.morristechnicalsolutions.com fax/phone: 503.692.1088 -------------------------------------------------------------------- To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]' in the BODY of a message to [EMAIL PROTECTED], NOT to the list (use your own address!) List problems? Notify [EMAIL PROTECTED] --------------------------------------------------------------------
