GitHub user rdblue opened a pull request:
https://github.com/apache/spark/pull/15738
SPARK-18086: Add support for Hive session vars.
## What changes were proposed in this pull request?
This adds support for Hive variables:
* Makes values set via `spark-sql --hivevar name=value` accessible
* Adds `getHiveVar` and `setHiveVar` to the `HiveClient` interface
* Adds a SessionVariables trait for sessions like Hive that support
variables (including Hive vars)
* Adds SessionVariables support to variable substitution
* Adds SessionVariables support to the SET command
## How was this patch tested?
* Adds a test to all supported Hive versions for accessing Hive variables
* Adds HiveVariableSubstitutionSuite
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/rdblue/spark SPARK-18086-add-hivevar-support
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/15738.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 #15738
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