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* [Feature] Support lateral view The syntax: ``` select k1, e1 from test lateral view explode_split(k1, ",") tmp as e1; ``` ```explode_split``` is a special function of doris, which is used to separate the string column according to the specified split string, and then convert the row to column. This is a conforming function of string separation + table function, and its behavior is equivalent to explode in hive ```explode(split(string, string))``` The implement: A tablefunction operator is added to the implementation to handle the syntax of the lateral view separately. The query plan is following: ``` MySQL [test]> explain select k1, e1 from test_explode lateral view explode_split (k2, ",") tmp as e1; +---------------------------------------------------------------------------+ | Explain String | +---------------------------------------------------------------------------+ | PLAN FRAGMENT 0 | | OUTPUT EXPRS:`k1` | `e1` | | | | RESULT SINK | | | | 1:TABLE FUNCTION NODE | | | table function: explode_split(`k2`, ',') | | | | | 0:OlapScanNode | | TABLE: test_explode | +---------------------------------------------------------------------------+ ``` * Add ut * Add multi table function node * Add session variables 'enable_lateral_view' * Fix ut
Apache Doris (incubating)
Doris is an MPP-based interactive SQL data warehousing for reporting and analysis. Its original name was Palo, developed in Baidu. After donated to Apache Software Foundation, it was renamed Doris.
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Doris provides high concurrent low latency point query performance, as well as high throughput queries of ad-hoc analysis.
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Doris provides batch data loading and real-time mini-batch data loading.
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Doris provides high availability, reliability, fault tolerance, and scalability.
The main advantages of Doris are the simplicity (of developing, deploying and using) and meeting many data serving requirements in a single system. For details, refer to Overview.
Official website: https://doris.apache.org/
License
Note
Some licenses of the third-party dependencies are not compatible with Apache 2.0 License. So you need to disable some Doris features to be complied with Apache 2.0 License. For details, refer to thethirdparty/LICENSE.txt
Technology
Doris mainly integrates the technology of Google Mesa and Apache Impala, and it is based on a column-oriented storage engine and can communicate by MySQL client.
Compile and install
See Compilation for details.
Report issues or submit pull request
If you find any bugs, feel free to file a GitHub issue or fix it by submitting a pull request.
Contact Us
Contact us through the following mailing list.
| Name | Scope | |||
|---|---|---|---|---|
| dev@doris.apache.org | Development-related discussions | Subscribe | Unsubscribe | Archives |
Links
- Doris official site - http://doris.incubator.apache.org
- User Manual (GitHub Wiki) - https://github.com/apache/incubator-doris/wiki
- Developer Mailing list - dev@doris.apache.org. Mail to dev-subscribe@doris.apache.org, follow the reply to subscribe the mail list.
- Gitter channel - https://gitter.im/apache-doris/Lobby - Online chat room with Doris developers.
- Overview - https://github.com/apache/incubator-doris/wiki/Doris-Overview
- Compile and install - https://github.com/apache/incubator-doris/wiki/Doris-Install
- Getting start - https://github.com/apache/incubator-doris/wiki/Getting-start
- Deploy and Upgrade - https://github.com/apache/incubator-doris/wiki/Doris-Deploy-%26-Upgrade
- User Manual - https://github.com/apache/incubator-doris/wiki/Doris-Create%2C-Load-and-Delete
- FAQs - https://github.com/apache/incubator-doris/wiki/Doris-FAQ