| commit | 1bf7f1525374c9e414f89d5a17056e860a125510 | [log] [tgz] |
|---|---|---|
| author | Paul Rogers <par0328@yahoo.com> | Sat May 25 20:40:22 2019 -0700 |
| committer | Arina Ielchiieva <arina.yelchiyeva@gmail.com> | Fri Jun 07 13:31:19 2019 +0300 |
| tree | 13471de1edb6c05680cf42de59d73e31c36c75ca | |
| parent | 8a7007f03397849b555a74297a6a637293958cc5 [diff] |
DRILL-7261: Simplify Easy framework config for new scan Most format plugins are created using the Easy format plugin. A recent change added support for the "row set" scan framework. After converting the text and log reader plugins, it became clear that the setup code could be made simpler. * Add the user name to the "file scan" framework. * Pass the file system, split and user name to the batch reader via the "schema negotiator" rather than via the constructor. * Create the traditional "scan batch" scan or the new row-set scan via functions instead of classes. * Add Easy config option and method to choose the kind of scan framework. * Add Easy config options for some newer options such as whether the plugin supports statistics. Simplified reader creation * The batch reader can be created just by overriding a method. * A default error context is provided if the plugin does not provide one. Tested by running all unit tests for the CSV reader which is based on the new framework, and by testing the converted log reader (that reader is not part of this commit.) closes #1796
Apache Drill is a distributed MPP query layer that supports SQL and alternative query languages against NoSQL and Hadoop data storage systems. It was inspired in part by Google's Dremel.
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