"and exists" used in source-pattern part of accumulate statement matches multiple times in executable model. ------------------------------------------------------------------------------------------------------------ Key: DROOLS-5965 URL: https://issues.redhat.com/browse/DROOLS-5965 Project: Drools Issue Type: Bug Components: executable model Reporter: Mario Fusco Assignee: Mario Fusco Priority: Major Labels: support Attachments: reproducer_model_compiler_16a.zip When executing a rule like (\*1) that uses {{and exists}} in _source-pattern_ part of {{accumulate}} statement like (\*1-1) in executable model, the sub-pattern given by {{and exists}} matches multiple times. For example in rule (\*1), we insert 1 {{Car}} object and 3 {{InspectionResult}} objects with the same value of {{number}} property as the {{Car}} object, the _source-pattern_ in the {{accumulate}} statement matches 3 times. In this case, it should match only once. (\*1) {noformat} package com.example.reproducer import java.util.List dialect "java" rule "rule16a2" when $list : List() from accumulate ( $car : Car( $number : number ) and exists InspectionResult( number == $number ); // ..... (*1-1) collectList($car) ) then System.out.println("***** Action of rule16a2 -- $list = " + $list); end {noformat}