POStore st = new POStore(new OperatorKey(scope,nig.getNextNodeId(scope)));
st.setSFile(oldSpec);
st.setIsTmpStore(oldIsTmpStore);
st.setSchema(((POStore)mpLeaf).getSchema());
st.setSignature(((POStore)mpLeaf).getSignature());
st.copyAliasFrom(mpLeaf);
limitAdjustMROp.reducePlan.addAsLeaf(st);
limitAdjustMROp.requestedParallelism = 1;
limitAdjustMROp.setLimitOnly(true);