[jboss-jira] [JBoss JIRA] (DROOLS-675) Query Optimization for RHS by changing pattern match order

[Paul Houle (JIRA)]

Paul Houle created DROOLS-675:
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             Summary: Query Optimization for RHS by changing pattern match order
                 Key: DROOLS-675
                 URL: https://issues.jboss.org/browse/DROOLS-675
             Project: Drools
          Issue Type: Enhancement
    Affects Versions: 6.2.0.CR3
         Environment: any
            Reporter: Paul Houle
            Assignee: Mark Proctor


I've been using Drools for what I consider "small" semantic databases,  right now in the range of 1M-10M facts but that could get bigger.

One thing I notice is that performance is dependent on the order that I put patterns in the RHS;  if the high selectivity patterns go first I am happy with the results but put them in the wrong order and gee wiz,  I won't wait long enough for it to try all the matches that fail.

I see Drools as competitive with products such as triple stores,  deductive databases and many of them have this feature




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