Hi folks. We are improving the query plan by changing from the tree form to the DAG form. https://issues.apache.org/jira/browse/TAJO-266
The DAG form of query enables various query optimizations such as intermediate result sharing or optimization for input correlation. This work have been proceeded in the DAG-execplan branch, but updates get too stale. If we proceed more works, it needs numerous updates from the master branch and causes a bunch of conflicts. Thus, it would be better to recreate a new branch from the master branch to include the necessary changes of the existing branch. I hope that it will not make you confused. Best regards, Jihoon
