[jboss-jira] [JBoss JIRA] Commented: (JBRULES-1701) add unique directive for drl

[Mark Proctor (JIRA)]

    [ https://jira.jboss.org/jira/browse/JBRULES-1701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12423133#action_12423133 ] 

Mark Proctor commented on JBRULES-1701:
---------------------------------------

I'm not too keen on increasing the parser/build complexity for what is sugar.
eval( unique( A, B,C, D ) )

that seems adequatate to me instead of :
unique( A, B,C, D ) 

Which we would expand to:
eval( unique( A, B,C, D ) )

Btw you know there is the remove identity equals option that will disallow any match where a fact is matched more than once? See RuleBaseConfiguration

Mark


> add unique directive for drl
> ----------------------------
>
>                 Key: JBRULES-1701
>                 URL: https://jira.jboss.org/jira/browse/JBRULES-1701
>             Project: JBoss Drools
>          Issue Type: Feature Request
>      Security Level: Public(Everyone can see) 
>          Components: Drl Parser/Builder
>            Reporter: zhou yanming
>            Assignee: Mark Proctor
>
> 	when 
> 		Number(A:value);
> 		Number(B:value);
> 		Number(C:value);
> 		Number(D:value);
> 		unique(A,B,C,D);
> equals to
> 	when 
> 		Number(A:value);
> 		Number(B:value);
> 		Number(C:value);
> 		Number(D:value);
> 		eval(A!=B and A!=C and A!=D and B!=C and B!=D and C!=D );

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