@Override
public Object process(
Node nd, Stack<Node> stack, NodeProcessorCtx procCtx, Object... nodeOutputs)
throws SemanticException {
ReduceSinkDeduplicateProcCtx dedupCtx = (ReduceSinkDeduplicateProcCtx) procCtx;
if (dedupCtx.hasBeenRemoved((Operator<?>) nd)) {
return false;
}
ReduceSinkOperator cRS = (ReduceSinkOperator) nd;
Operator<?> child = CorrelationUtilities.getSingleChild(cRS);
if (child instanceof JoinOperator) {
return false; // not supported
}
if (child instanceof GroupByOperator) {
GroupByOperator cGBY = (GroupByOperator) child;
if (!CorrelationUtilities.hasGroupingSet(cRS) && !cGBY.getConf().isGroupingSetsPresent()) {
return process(cRS, cGBY, dedupCtx);
}
return false;
}
if (child instanceof SelectOperator) {
return process(cRS, dedupCtx);
}
return false;
}
