    No, you can't retract the fact like that, for several reasons. Why would you want to do that?

    If you are using the SLS_SLES_DTLS for this rule, and you don't want to keep them in memory for other rules, you can use "from" to pull them on-demand. Another option is that you can write another rule that retract your facts, with a lower salience, but you will have to use lock-on-active to avoid the accumulate rule being re-activated after the retraction of your facts.

    One more comment, not related to your question, but I think it is a good example. Most people don't know that accumulate functions can take expressions as the parameter. So, instead of using a custom accumulate code like you have in your rule, would be simpler to just use the sum() accumulate function with an expression. Using java dialect as it seems you are, it would be:

    brand_total:Number(doubleValue >=1500)
        from accumulate ( sa:SLS_SALES_DTLS( PK!=null, PK.ITEM_ID.BRAND_CD.BRAND_CD=="N00" ) ,
                                   sum( sa.getTRN_QTY()* sa.getPK().getITEM_ID().getSALES_TO_BASE_CONV() ) )

     With MVEL, it would be a bit cleaner:

    brand_total:Number(doubleValue >=1500)
        from accumulate ( sa:SLS_SALES_DTLS( PK!=null, PK.ITEM_ID.BRAND_CD.BRAND_CD=="N00" ) ,
                                   sum( sa.TRN_QTY * sa.PK.ITEM_ID.SALES_TO_BASE_CONV )

     Hope it helps.

     []s
     Edson

2009/1/26 niraj manandhar <regniraj@gmail.com>

Can i retract the objects from accumulate function
rule "Brand base free Item "
salience 10
when
    brand_total:Number(doubleValue >=1500)
        from accumulate ( sa:SLS_SALES_DTLS(
        PK!=null,
        PK.ITEM_ID.BRAND_CD.BRAND_CD=="N00"
    ) ,    init ( double single_total=0; ),
    action (single_total=single_total+(sa.getTRN_QTY()*
    sa.getPK().getITEM_ID().getSALES_TO_BASE_CONV()
// I want to retract the sa over here

);
    ),
    result (single_total ) );
then
double item_discounted=brand_total.doubleValue()/    1500;
System.out.println("The discount given qty "+item_discounted+" multiplied slot 10");
double item_left=brand_total.doubleValue()%1500;
if(item_left>=1)
{
doit(item_left,"N00");
}
end

_______________________________________________
rules-users mailing list
rules-users@lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users

--
Edson Tirelli
JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com