[jboss-jira] [JBoss JIRA] (DROOLS-2595) Average accumulate function should return null instead of zero when no facts are matched

[Geoffrey De Smet (JIRA)]

    [ https://issues.jboss.org/browse/DROOLS-2595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13583733#comment-13583733 ] 

Geoffrey De Smet commented on DROOLS-2595:
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Example of problem:
Input: Cheese("stilton", 30), Cheese("stilton", 40)
What's the average price for stilton? 35 - OK
What's the average price for cheddar? null - OK
Add Cheese("cheddar", 50).
What's the average price for cheddar? 50 - OK
Remove Cheese("cheddar", 50).
What's the average price for cheddar? 0 - NOT OK, should be null just like originally

> Average accumulate function should return null instead of zero when no facts are matched
> ----------------------------------------------------------------------------------------
>
>                 Key: DROOLS-2595
>                 URL: https://issues.jboss.org/browse/DROOLS-2595
>             Project: Drools
>          Issue Type: Bug
>          Components: core engine
>            Reporter: Mario Fusco
>            Assignee: Mario Fusco
>




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