logger.debug("rolling back transaction");
boolean statementsDeprecated = false;
for (MemStatement st : txnStatements.keySet()) {
TxnStatus txnStatus = st.getTxnStatus();
if (txnStatus == TxnStatus.NEW || txnStatus == TxnStatus.ZOMBIE) {
// Statement has been added during this transaction and deprecates
// immediately
st.setTillSnapshot(currentSnapshot);
statementsDeprecated = true;