GitHub user dongjoon-hyun opened a pull request:
https://github.com/apache/spark/pull/19562
[SPARK-21912][SQL][FOLLOW-UP] ORC/Parquet table should not create invalid
column names
## What changes were proposed in this pull request?
During [SPARK-21912](https://issues.apache.org/jira/browse/SPARK-21912), we
skip testing on 'ADD COLUMNS' on ORC tables due to ORC limitation. Since
[SPARK-21929](https://issues.apache.org/jira/browse/SPARK-21929) is resolved
now, we can test both `ORC` and `PARQUET` completely.
## How was this patch tested?
Pass the updated test case.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dongjoon-hyun/spark SPARK-21912-2
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/19562.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 #19562
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