1. Scalable distributed stream join processing;Lin,2015
2. Tidb. source code of tidb, https://github.com/pingcap/tidb.
3. Mysql cluster.join pushdown, https://dev.mysql.com/doc/mysql-cluster-excerpt/5.7/en/mysql-cluster-system-variables.html.
4. Apache drill. join planning guidelines, http://drill.apache.org/docs/join-planning-guidelines/.
5. Hive - a petabyte scale data warehouse using hadoop;Thusoo,2010