Table partitioning gives many facilities to maintain large tables. First of all, it enables the data management system to prune many input data which are actually not necessary. In addition, it gives the system more optimization opportunities that exploit the physical layouts.
Basically, Tajo should follow the RDBMS-style partitioning system, including range, list, hash, and so on. In order to keep Hive compatibility, we need to add Hive partition type that does not exists in existing DBMS systems.