[rules-users] Question about pulling data from external database

[Mark Proctor]

Zhang Jing-A52198 wrote:
>
> Hi All,
>
>  
>
> When I use the "from" keyword to pull data from external database, 
> will those data get inserted to the current working memory?
>
No, think of it link a nested for loop. That data is local to the rule, 
you cannot retract it, they will be garbage collected with the existing 
woringmemory elements that join with them are removed.

> Do I need to retract them after the rules are fired?
>
>  
>
> Thanks,
>
> Jing
>
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