|| op instanceof QueryResultInBlocks) {
join.addPrecedingOperator(op);
continue;
}
final Operator par = new ParallelOperand();
par.addPrecedingOperator(op);
added.add(par);
final Operator maybequeryresultinblocks;
if (isBLOCKWISE()) {
maybequeryresultinblocks = new QueryResultInBlocks();
added.add(maybequeryresultinblocks);
par.setSucceedingOperator(new OperatorIDTuple(
maybequeryresultinblocks, 0));
maybequeryresultinblocks.addPrecedingOperator(par);
} else {
maybequeryresultinblocks = par;
}