Re: [rules-users] FROM and the working memory
David, it will use RETE but the actual data is retrieved "on-demand"...
meaning no previous processing is made, and if it is a list, it will iterate
the list every-time, so, it is less efficient than when the data is already
in the working memory. It is useful for cases, for instance, when you have a
lot of data outside of the working memory, but you are only interested in a
small subset of the data... asserting all the data would then be a waste.
[]s
Edson
2008/8/19 David Boaz <davidb(a)dbmotion.com>
Hi all,
in the drools manual (6.5.28): "FROM allows the engine to reason over data
not in the working memory".
Will drools use rete to evaluate patterns with a FROM source?
Lets assume the following rule:
WHEN p:Person(age>60), Address(city="NY") FROM p.addresses
will the rule engine match the Address pattern using rete?
and, what about the following rule:
when p:Person(age="m"), Person(age>60) from p
1) will it work?
2) will the age constraint be matched using rete?
Thanks, David
--
View this message in context:
http://www.nabble.com/FROM-and-the-working-memory-tp19020847p19020847.html
Sent from the drools - user mailing list archive at Nabble.com.
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
--
Edson Tirelli
JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com
Attachments:
- attachment.html (text/html — 2.2 KB)