Apache Tajo™ 0.8.0 发布，此版本的源代码和二进制包已经提供下载。这个第一个高级版本发布，在这个版本中，关闭了 363 个 issues ，包括 25 个新特性，81 个改进和 164 个 bug 修复。
值得关注的改进记录：
- SQL 支持
* Database support (TAJO-353)
* Full/Left/Outer join (TAJO-34, TAJO-312)
* Complex joins including derived subqueries and unions.
* Datetime types and operator support
* Date type support (TAJO-60, TAJO-438)
* Time type support (TAJO-61, TAJO-439)
* Timestamp type support (TAJO-62, TAJO-437)
* Add datetime operation and functions
* extract(), to_timestamp(), utc_usec_to()
* SQL standard and PostgreSQL-compatible string function support
* ascii(), length(), chr(), bit_length(string), hex(),
octet_length(), reverse(), right(), left(), md5, repeat, substr(),
strpos, locate(), initcap(), lpad(), rpad(), concat(), concat_ws(),
ltrim(), rtrim(), btrim(), trim(), and so on.
* SQL standard math function support
* mod(), div(), degrees(), radians(), cbrt(), abs(), exp(),
sqrt(), sin(), sign(), pow(), ceiling(), round(), floor(), ceil(), and
so on.
* Other functions
* sha1(), digest(), find_in_set(), to_bin(), and so on.
* CREATE TABLE AS (CTAS) on partition table (TAJO-460)
* ALTER TABLE RENAME (TAJO-615)
* ALTER TABLE ADD/RENAME COLUMN (TAJO-696, TAJO-697)
* Quoted identifier support (TAJO-644)
* Complex expression support in group-by, order-by, and having clauses
* Distinct aggregation support (TAJO-601)
* Explain statement support (TAJO-122)
- 性能和可扩展性
* More I/O efficient M-way unbalanced external sort executor (TAJO-36, TAJO-584)
* Reduced intermediate data volume (TAJO-435)
* Star-schema broadcast support (TAJO-725)
* Duplicated expression removal and more efficient projection push
down (TAJO-501)
* Reduced memory consumption in expression evaluation (TAJO-539)
* Reduced GC overhead and memory usage (TAJO-522, TAJO-537, TAJO-544, TAJO-548)
* I/O efficient sort-based dynamic partition store method (TAJO-574)
- Storage 支持
* Configurable serializer/deserializer of Text file (TAJO-424)
* Parquet file support (TAJO-30, TAJO-714)
* Avro storage support (TAJO-711)
* Amazon S3 support (TAJO-577)
- 与 Hadoop ecosystems 的集成
* Hadoop 2.2.0, 2.3.0 or 2.4.0 support
* More improved Hive meta integration (TAJO-289, TAJO-300, TAJO-301)
* Hive-compatible table partition (TAJO-285, TAJO-284, TAJO-338)
- 客户端和用户界面
* More improved WEB UI
* Tajo sql shell (tsql) recap
* Linux Shell command and HDFS command support in tsql (TAJO-732)
* Tajo JDBC Driver support and its improvements (TAJO-176, TAJO-745)
* Fine-grained query progress indicator (TAJO-589)
* Add killQuery feature (TAJO-305)
项目主页：http://tajo.apache.org/releases/0.8.0/relnotes.html
下载地址：http://tajo.apache.org/downloads
来自:开源中国社区
