I saw someone is requesting LIMIT, here I saw Manukyan is asking for ORDER BY, and also Mark is talking the FROM. Looks like the rule LHS part would become more and more like SQL SELECT statement. :)

 

I think it is the right way. Some Stream Database also extends the SQL to do event aggregation and correlation. The same can be applied to Rule Engine too.

 

Yang

 

On 8/27/07, Manukyan, Sergey <SManukyan@lear.com> wrote:

Folks,

 

When using collect on List of items with some filter (criteria), I need to have result in the same order as it was received:

 

F.e. I have a list of suppliers :

 

List()  :   Supplier("FIRST", Status.ACTIVE),  Supplier("SECOND", Status.INACTIVE), Supplier("THIRD", Status.INACTIVE )

 

And I need to find first INACTIVE supplier, so it must be SECOND supplier.

 

So doing the following :

 

 

When

$l : List()  // list of suppliers

$inactive_supp : ArrayList() from collect Supplier(status == Status.INACTIVE) from $l

Then

            System.out.println($l); // prints FIRST, SECOND, THIRD

System.out.println($inactive_supp);  // prints THIRD, SECOND  …. Instead of SECOND , THIRD

 

 

So I am getting THIRD supplier instead of SECOND as the result..

 

Please advise if it is a bug .., or there is another way of doing that…

 

Thanks,

 

-Sergey

 

 

 

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