/*
* recreate cluster, so that it picks up the additional traitDef
*/
RelOptPlanner planner = HiveVolcanoPlanner.createPlanner();
final RelOptQuery query = new RelOptQuery(planner);
final RexBuilder rexBuilder = cluster.getRexBuilder();
cluster = query.createCluster(rexBuilder.getTypeFactory(), rexBuilder);
this.cluster = cluster;
this.relOptSchema = relOptSchema;
try {