GitHub user fhueske opened a pull request:
https://github.com/apache/flink/pull/5373
[FLINK-8230] [orc] Fix NPEs when reading nested columns.
## What is the purpose of the change
- fixes NPEs for null-valued structs, lists, and maps
- fixes NPEs for repeating structs, lists, and maps
## Brief change log
- renamed `OrcUtils` to `OrcBatchReader`
- reimplement large parts of the `OrcBatchReader`
- add tests for nested columns with nulls and repeating values
- added a class to generate ORC files for tests
## Verifying this change
- added tests to `OrcInputFormatTest`
- changes have been verified by a user on a production dataset.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): **no**
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: **no**
- The serializers: **no**
- The runtime per-record code paths (performance sensitive): **no**
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Yarn/Mesos, ZooKeeper: **no**
- The S3 file system connector: **no**
## Documentation
- Does this pull request introduce a new feature? **no**
- If yes, how is the feature documented? **n/a**
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/fhueske/flink orcNPE
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/5373.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 #5373
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commit 97fd0c7687eff6f8b84516f4d8ab8268cab838b1
Author: Fabian Hueske <fhueske@...>
Date: 2017-12-12T11:09:14Z
[FLINK-8230] [orc] Fix NPEs when reading nested columns.
- fixes NPEs for null-valued structs, lists, and maps
- fixes NPEs for repeating structs, lists, and maps
- adds test for deeply nested data with nulls
- adds test for columns with repeating values
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