Re: [rules-users] Re: Drools indexing

Senlin Liang wrote: Thanks Mark! I got another question: what kind of indexing is used in drools? what field does it index? It wil index the field used in the constraint Person( name == "mark" ) Person( name == $var ) Both of those pattners will be indexed no the name field, the first is what we call alpha node hashing, as it's on a literal and the latter is join node index on the name field. I checked the online manual, it seems that I uses hashing index, but i am not sure the details. The reason that I am asking this question is that: drools runs really faster for one of my program. In this program, there is information about DBLP publications: a(primary key, property, values), where primary key is the primary key of one publication, property can be one of "author, year, ...", and value is the value of the property. I run the query by joining the tables together using the primary key. Drools runs really fast for this program. I am wondering whether there is anything behind to make drools fast. Senlin On Wed, Oct 15, 2008 at 3:41 PM, Mark Proctor <mproctor(a)codehaus.org&gt; wrote: Senlin Liang wrote: One more question: does drools index intermediate results (such as the inserted objects in actions)? Any inserted object used in == constraints is indexed for that constraint. Is there any cost-based optimization for queries? no Thanks On Wed, Oct 15, 2008 at 9:10 AM, Senlin Liang <senlin.liang(a)gmail.com&gt; wrote: Hi all, I got one question: How does drools index the objects in memory? Does it use hashing index, based on what? Or drools uses adaptive indexing? Thanks a lot, Senlin _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users