GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/17187
[SPARK-19847][SQL] port hive read to FileFormat API
## What changes were proposed in this pull request?
implement the read logic in `HiveFileFormat`, to unify the table read path
between data source and hive serde tables.
The major change is, hive partition may have a different serde, so the
planner should put more information in `PartitionedFile` and send it to
executors.
Tow things need to be improved in the future:
1. Due to the way we read hive table files, we do not support reading a
partial file yet, which may reduce the parallelism for large files.
2. Hive tables with storage handler(non-file-based) still go to the old
code path.
## How was this patch tested?
existing tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark hive-read
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/17187.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 #17187
----
commit ad478870c652553b8b225a569e460fb6ccef0c36
Author: Wenchen Fan <[email protected]>
Date: 2017-03-02T07:15:42Z
port hive read to FileFormat API
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