if (this.succeedingOperators.size() > 1) {
opp.materialize();
}
for (final OperatorIDTuple opId : this.succeedingOperators) {
((DebugStepRIF)debugstep).step(this, opId.getOperator(), rr);
final QueryResultDebug qrDebug = new QueryResultDebug(opp,
debugstep, this, opId.getOperator(), true);
((Operator) opId.getOperator()).processAllDebug(qrDebug,
opId.getId(), debugstep);
}
}