GitHub user liancheng opened a pull request:
https://github.com/apache/spark/pull/17247
[SPARK-19905][SQL] Bring back Dataset.inputFiles for Hive SerDe tables
## What changes were proposed in this pull request?
`Dataset.inputFiles` works by matching `FileRelation`s in the query plan.
In Spark 2.1, Hive SerDe tables are represented by `MetastoreRelation`, which
inherits from `FileRelation`. However, in Spark 2.2, Hive SerDe tables are now
represented by `CatalogRelation`, which doesn't inherit from `FileRelation`
anymore, due to the unification of Hive SerDe tables and data source tables.
This change breaks `Dataset.inputFiles` for Hive SerDe tables.
This PR tries to fix this issue by explicitly matching `CatalogRelation`s
that are Hive SerDe tables in `Dataset.inputFiles`. Note that we can't make
`CatalogRelation` inherit from `FileRelation` since not all `CatalogRelation`s
are file based (e.g., JDBC data source tables).
## How was this patch tested?
New test case added in `HiveDDLSuite`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/liancheng/spark
spark-19905-hive-table-input-files
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/17247.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 #17247
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commit 3e0abc48de8219e3daf839584ec874855ced1210
Author: Cheng Lian <[email protected]>
Date: 2017-03-10T19:42:17Z
Bring back Dataset.inputFiles for Hive SerDe tables
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