[jboss-jira] [JBoss JIRA] Closed: (JBRULES-547) Create a specialized "exists" node in reteoo
[ http://jira.jboss.com/jira/browse/JBRULES-547?page=all ]
Edson Tirelli closed JBRULES-547.
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Fix Version/s: 3.1-m1
(was: 3.1-m2)
Resolution: Done
A new specialized node was created for exists. Expected results are to solve some problems
we had when using not+not to represent "exists" and also some performance
improvements.
Commited into trunk in revision #7724. It will be included in 3.1m1 release.
Sending drools-compiler/src/main/java/org/drools/semantics/java/RuleBuilder.java
Adding drools-core/src/main/java/org/drools/reteoo/ExistsNode.java
Sending drools-core/src/main/java/org/drools/reteoo/NotNode.java
Sending drools-core/src/main/java/org/drools/reteoo/QueryTerminalNode.java
Sending drools-core/src/main/java/org/drools/reteoo/ReteooBuilder.java
Adding drools-core/src/test/java/org/drools/reteoo/ExistsNodeTest.java
Transmitting file data ......
Committed revision 7724.
Create a specialized "exists" node in reteoo
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Key: JBRULES-547
URL: http://jira.jboss.com/jira/browse/JBRULES-547
Project: JBoss Rules
Issue Type: Feature Request
Security Level: Public(Everyone can see)
Components: Drl Parser/Builder, Reteoo
Reporter: Edson Tirelli
Assigned To: Edson Tirelli
Fix For: 3.1-m1
Currently, "exists" conditional element is implemented as a sequence of 2
"not" nodes. This is suboptimal for performance and adds complexity to the
network with specialized constraints and the requirement for a specific
RightInputAdapterNode.
Also, the currently implementation causes unnecessary work to be performed. For instance,
trace the work done in the terminal node in the following example:
package org.drools
query "2 persons with the same status"
p : Person($status : status, $age : age)
exists Person(status == $status, age > $age);
end
So, replace current implementation for a specialized "ExistsNode".
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