GitHub user JasonMWhite opened a pull request:
https://github.com/apache/spark/pull/12470
[SPARK-14700] [Python] adding SQL Row equality and inequality overrides
## What changes were proposed in this pull request?
This PR adds equality and inequality overrides to `pyspark.sql.Row`.
Without this override, `Row` simply uses the equality operator of `tuple`,
which doesn't consider the private member `__fields__` of Row to determine the
implicit ordering needed to compare the tuples correctly.
Without this PR, we get seemingly illogical equality checks like:
```
Row(a=1) == Row(b=1) # True
r1 == Row('b', 'a')(2, 1) # Row(b=2, a=1)
r1 == Row(b=2, a=1) # False
r1 == Row(a=2, b=1) # True
```
## How was this patch tested?
Unit tests were added to `pyspark/sql/types.py` in the `Row` docstring. A
handful of newly failing tests in `pyspark/sql/tests.py` were fixed.
This PR is my original work and I license the work to the project under the
project's open source license.
@davies @rxin Mind having a look?
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/JasonMWhite/spark row_equality
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/12470.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 #12470
----
commit 986c8f27f34c53d44df59296042605d373bae7e7
Author: Jason White <[email protected]>
Date: 2016-04-18T05:10:51Z
adding SQL Row equality and inequality overrides
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