commit | c156e5c936462857d26920b3c5863c9d38b3ac62 | [log] [tgz] |
---|---|---|
author | Jihoon Son <jihoonson@apache.org> | Wed May 04 18:03:22 2016 +0900 |
committer | Jihoon Son <jihoonson@apache.org> | Wed May 04 18:03:22 2016 +0900 |
tree | 7b9812925df531d356515699be114541c44f73b2 | |
parent | 16cbf69fe363de82e17bbb26f39ce7efa23d6546 [diff] |
TAJO-2135: Invalid join result when join key columns contain nulls. Closes #1009
Tajo is a relational and distributed data warehouse system for Hadoop. Tajo is designed for low-latency and scalable ad-hoc queries, online aggregation and ETL on large-data sets by leveraging advanced database techniques. It supports SQL standards. It has its own query engine which allows direct control of distributed execution and data flow. As a result, Tajo has a variety of query evaluation strategies and more optimization opportunities. In addition, Tajo will have a native columnar execution and and its optimizer.
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