GitHub user liancheng opened a pull request:
https://github.com/apache/spark/pull/6537
[SQL] Simplifies binary node pattern matching
This PR is a simpler version of #2764, and adds `unapply` method for the
following binary nodes for simpler pattern matching:
- `BinaryExpression`
- `BinaryComparison`
- `BinaryArithmetics`
For example, this may simplify the following pattern matching
```scala
case p: BinaryComparison if p.left.dataType == StringType &&
p.right.dataType == DateType =>
p.makeCopy(Array(p.left, Cast(p.right, StringType)))
```
to
```scala
case p @ BinaryComparison(l @ StringType(), r @ DateType()) =>
p.makeCopy(Array(l, Cast(r, StringType)))
```
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/liancheng/spark binary-node-patmat
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/6537.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 #6537
----
commit d4922e916d9468b0ad8ccd76f0f6ecb4c92b3737
Author: Cheng Lian <[email protected]>
Date: 2015-05-31T09:30:22Z
Simplifies binary node pattern matching
----
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