Question about Interpreter and Corelations

[Zoltan Farkas]

for a test query with the following plan:

LogicalProject(name=[$1], friends=[$4])
  LogicalCorrelate(correlation=[$cor0], joinType=[inner], requiredColumns=[{0}])
    LogicalTableScan(table=[[characters]])
    Collect(field=[EXPR$0])
      LogicalProject(name=[$2])
        LogicalJoin(condition=[=($0, $1)], joinType=[inner])
          LogicalProject(characterId2=[$1])
            LogicalFilter(condition=[=($0, $cor0.characterId)])
             LogicalTableScan(table=[[friendships]])
          LogicalProject(characterId=[$0], name=[$1])
            LogicalTableScan(table=[[characters]])

I get :

java.lang.nsupportedOperationException
        at 
o.a.c.i.JaninoRexCompiler.lambda$compile$0(JaninoRexCompiler.java:94)[calcite-core-1.21.0.jar:1.21.0]
        at 
o.a.c.a.e.RexToLixTranslator.translate0(RexToLixTranslator.java:714)[^]
        at ^.translate(^:199)[^]
        at ^.translate0(^:684)[^]
        at ^.translate(^:199)[^]
        at ^.translate(^:194)[^]
        ...

when trying to use the Interpreter.

Is this a current limitation?  

the query is :

select name,
          ARRAY(select c2.name from friendships f, characters c2
                             where f.characterId1 = c.characterId and 
f.characterId2 = c2.characterId) as friends
from characters c

let me know

thank you

—Z