GitHub user liancheng opened a pull request:
https://github.com/apache/spark/pull/13698
[SQL] Removes FileFormat.prepareRead
## What changes were proposed in this pull request?
Interface method `FileFormat.prepareRead()` was added in #12088 to handle a
special case in the LibSVM data source.
However, semantics of this interface method isn't intuitive: it returns a
modified version of the data source options map. Considering that the LibSVM
case can be easily handled using schema metadata inside `inferSchema`, we can
remove this interface method to keep the `FileFormat` interface clean.
## How was this patch tested?
Existing tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/liancheng/spark remove-prepare-read
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/13698.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 #13698
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commit 631463524e033d24bb64b186c4ec8cdb48a80e2c
Author: Cheng Lian <[email protected]>
Date: 2016-06-15T23:58:46Z
Removes FileFormat.prepareRead
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