int pos = parentOperators.indexOf(op);
assert pos != -1;
parentOperators.remove(pos);
parentOperators.add(pos, output); // add the new op as the old
}
OpParseContext ctx = new OpParseContext(inputRR);
owi.put(output, ctx);
if (HiveConf.getBoolVar(owi.getParseContext().getConf(),
HiveConf.ConfVars.HIVEPPDREMOVEDUPLICATEFILTERS)) {
// remove the candidate filter ops