GitHub user vanzin opened a pull request:
https://github.com/apache/spark/pull/13831
[SPARK-16119][sql] Support PURGE option to drop table / partition.
This option is used by Hive to directly delete the files instead of
moving them to the trash. This is needed in certain configurations
where moving the files does not work. For non-Hive tables and partitions,
Spark already behaves as if the PURGE option was set, so there's no
need to do anything.
Hive support for PURGE was added in 0.14 (for tables) and 1.2 (for
partitions), so the code reflects that: trying to use the option with
older versions of Hive will cause an exception to be thrown.
The change is a little noisier than I would like, because of the code
to propagate the new flag through all the interfaces and implementations;
the main changes are in the parser and in HiveShim, aside from the tests
(DDLCommandSuite, VersionsSuite).
Tested by running sql and catalyst unit tests, plus VersionsSuite which
has been updated to test the version-specific behavior. I also ran an
internal test suite that uses PURGE and would not pass previously.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/vanzin/spark SPARK-16119
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/13831.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 #13831
----
commit a53b7fdfd64b6617ee861821908684a5afe98eec
Author: Marcelo Vanzin <[email protected]>
Date: 2016-06-21T23:01:49Z
[SPARK-16119][sql] Support PURGE option to drop table / partition.
This option is used by Hive to directly delete the files instead of
moving them to the trash. This is needed in certain configurations
where moving the files does not work. For non-Hive tables and partitions,
Spark already behaves as if the PURGE option was set, so there's no
need to do anything.
Hive support for PURGE was added in 0.14 (for tables) and 1.2 (for
partitions), so the code reflects that: trying to use the option with
older versions of Hive will cause an exception to be thrown.
The change is a little noisier than I would like, because of the code
to propagate the new flag through all the interfaces and implementations;
the main changes are in the parser and in HiveShim, aside from the tests
(DDLCommandSuite, VersionsSuite).
Tested by running sql and catalyst unit tests, plus VersionsSuite which
has been updated to test the version-specific behavior. I also ran an
internal test suite that uses PURGE and would not pass previously.
----
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