Decision Table (XLS) should support fixed conditions, such as SeatDesignation(isNeighborOf($guest)) --------------------------------------------------------------------------------------------------- Key: DROOLS-470 URL: https://issues.jboss.org/browse/DROOLS-470 Project: Drools Issue Type: Enhancement Components: decision tables Affects Versions: 6.1.0.Beta2 Reporter: Geoffrey De Smet Assignee: Michael Anstis Labels: optaplanner-request-for-drools Fix For: 7.0.0.Beta2 This DT should work: ||CONDITION||CONDITION||ACTION| |$guest : SeatDesignation()|$neighbor : SeatDesignation(isNeighborOf($guest))|| |guestName == "$param"|guestName == "$param"|doSomething();| It crashes because of the "SeatDesignation(isNeighborOf($guest))". Only empty parenthesis are allowed. Failing workaround 1: This workaround (as specified by the docs), does NOT work well, because it adds the same condition (isNeighborOf($guest)) multiple times in the same rule: ||CONDITION||CONDITION||CONDITION||ACTION| |$guest : SeatDesignation()|$neighbor : SeatDesignation()||| |guestName == "$param"|isNeighborOf($guest), guestName == "$param"|isNeighborOf($guest), guestAge == "$param"|doSomething();| Failing workaround 2: Adding an extra, hidden column with that condition does not work when new rows are added because condition columns with an empty cell are ignored.