GitHub user HyukjinKwon opened a pull request:
https://github.com/apache/spark/pull/13640
[SPARK-15916][SQL] Correctly pushdown top level and operators with
parenthesis in JDBC data source
## What changes were proposed in this pull request?
This PR insert the correct parenthesis between top level AND operator.
For example, the where clause below:
```
WHERE (NAME = 'fred' OR THEID = 100) AND THEID < 1
```
is being parsed as below:
```
WHERE (NAME = 'fred') OR (THEID = 100) AND (THEID < 1)
```
This is fine for other sub filters for each element in `Array[Filter]` but
it is not considering the parenthesis and precedence with `AND` between
elements in `Array[Filter]`.
## How was this patch tested?
Unit test in `JDBCSuite`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/HyukjinKwon/spark SPARK-15916
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/13640.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 #13640
----
commit 6d2580a8cc3d0ac12158e71b487f11be7c1353c7
Author: hyukjinkwon <[email protected]>
Date: 2016-06-13T10:32:16Z
Consider top level and/or precedence for parenthesis
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