Iterator<Operator> iter = currentPlan.getOperators();
while (iter.hasNext()) {
Operator op = iter.next();
op.removeAnnotation(INPUTUIDS);
op.removeAnnotation(OUTPUTUIDS);
op.removeAnnotation(REQUIREDCOLS);
}
}
// get a set of column indexes from a set of uids
protected Set<Integer> getColumns(LogicalSchema schema, Set<Long> uids) throws FrontendException {