GitHub user gengliangwang opened a pull request:
https://github.com/apache/spark/pull/23186
[SPARK-26230][SQL]FileIndex: if case sensitive, validate partitions with
original column names
## What changes were proposed in this pull request?
Partition column name is required to be unique under the same directory.
The following paths are invalid partitioned directory:
```
hdfs://host:9000/path/a=1
hdfs://host:9000/path/b=2
```
If case sensitive, the following paths should be invalid too:
```
hdfs://host:9000/path/a=1
hdfs://host:9000/path/A=2
```
Since column 'a' and 'A' are different, and it is wrong to use either one
as the column name in partition schema.
Also, there is a `TODO` comment in the code.
This PR is to resolve the problem.
## How was this patch tested?
Add unit test
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gengliangwang/spark SPARK-26230
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/23186.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 #23186
----
commit 6d052130051a21b9aa7c3ffce56a556bee129a5e
Author: Gengliang Wang <gengliang.wang@...>
Date: 2018-11-30T09:23:32Z
if case sensitive, validate partitions with original column names
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