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(a)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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