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13.29. Functions of the Conditional Element Accumulate
- average
- min
- max
- count
- sum
- collectList
- collectSet
These common functions accept any expression as input. For instance, if someone wants to calculate the average profit on all items of an order, a rule could be written using the average function:
rule "Average profit"
when
$order : Order()
accumulate( OrderItem( order == $order, $cost : cost, $price : price );
$avgProfit : average( 1 - $cost / $price ) )
then
// average profit for $order is $avgProfit
end
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