[rules-users] Pattern aggregation

[Tim 4076]

to be honest I could do with some initial pointers, as I'm struggling with
how to acheive this at all. I would have thought to somehow use accumulate,
but as far as I can work out there's no way to specify attributes that match
across facts, rather than match some constant.


On 18 October 2010 15:14, Greg Barton <greg_barton at yahoo.com> wrote:

> It would be nice if we had an example of some rules.  That way we can rule
> out obvious performance killers like cartesian products and multiple "from"
> clauses in one rule.
>
> GreG
>
> On Oct 18, 2010, at 5:19, Tim 4076 <tm4076 at gmail.com> wrote:
>
> Hi,
> I'm trying to use drools to do grouping of data according to patterns
> defined in my rules, but I'm having issues creating something that works in
> a reasonable amount of time (seconds). I've tried all sorts of permutations
> without much luck and would like to hear how others would do the same thing.
>
> To give an example: I've got a big batch of transaction records and I want
> to aggregate all the records where the consumer id and product category are
> the same and the purchases were made within an hour of each other.
>
> The fact that its matching the same values between facts, rather than
> against constants seems to scupper it somewhat.
>
> I would go down the ETL route, but the idea is for non-techies to define
> their own aggregations using rules.
>
> -Cheers. Tim
>
>
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