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

[Mark Proctor (JIRA)]

    [ https://issues.jboss.org/browse/DROOLS-675?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13092210#comment-13092210 ] 

Mark Proctor commented on DROOLS-675:
-------------------------------------

Sounds like  great feature, but we'd need some community help to do this right now. Ping us on irc, if you want some help in doing this.

> 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
>   Original Estimate: 6 minutes
>  Remaining Estimate: 6 minutes
>
> 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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