GitHub user maropu opened a pull request:
https://github.com/apache/incubator-hivemall/pull/61
[HIVEMALL-88][SPARK] Support a function to flatten nested schemas
## What changes were proposed in this pull request?
Since parquet is first-citizen in Spark, most of users use nested schemas
in DF. In some usecases, they need to flatten nested schemas into flat ones to
dump data into the other systems that do not support nested schemas, e.g.,
RDBMS. So, this pr added a conversion function from nested schemas to flat ones.
## What type of PR is it?
Improvement
## What is the Jira issue?
https://issues.apache.org/jira/browse/HIVEMALL-88
## How was this patch tested?
Added tests in `HivemallOpsSuite`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/maropu/incubator-hivemall HIVEMALL-88
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-hivemall/pull/61.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #61
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commit 602b79cfdbd1e985eca729932fdca1944f8b471f
Author: Takeshi Yamamuro <[email protected]>
Date: 2017-03-08T15:04:54Z
Support a function to flatten nested schemas
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