[jboss-jira] [JBoss JIRA] (DROOLS-4342) Using BigDecimal with From Accumulate causes an "Error: argument type mismatch"

[Luca Molteni (Jira)]

     [ https://issues.jboss.org/browse/DROOLS-4342?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Luca Molteni updated DROOLS-4342:
---------------------------------
    Comment: was deleted

(was: It's indeed a type mismatch, as the accumulate over a BigDecimal will return a Double and in the consequence you try to set it to a BigDecimal field.

Please change this rule like this:

rule "rule"
dialect "mvel"
when
  voucher : Voucher( )
  sumBilledAmounts : Number( ) from accumulate ( bill : Bill( billedAmount != null ),
    sum(bill.billedAmount))
then
  modify( voucher ) {
      setTotal( BigDecimal.valueOf(sumBilledAmounts.doubleValue()) )
  }
end

In this way you get the best data type for accumulating and at the same time you can decide which type (and precision) to set in the actual field.

)


> Using BigDecimal with From Accumulate causes an "Error: argument type mismatch"
> -------------------------------------------------------------------------------
>
>                 Key: DROOLS-4342
>                 URL: https://issues.jboss.org/browse/DROOLS-4342
>             Project: Drools
>          Issue Type: Bug
>          Components: kie server
>         Environment: Red Hat Process Automation Manager (RHPAM) 7.2.0
>            Reporter: Rodrigo Ribeiro
>            Assignee: Luca Molteni
>            Priority: Major
>              Labels: BigDecimal, DRL, bigdecimal, drl, kie-server, rhpam, rule
>         Attachments: reproducer-02425606.zip, request.json, testSum.scenario
>
>
> When written a rule that does a sum using ‘from accumulate’. The rule validates successfully. However, when trying to test it, is returned a very generic error message: Error: argument type mismatch.



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