GitHub user rxin opened a pull request:
https://github.com/apache/spark/pull/12538
[SPARK-14769][SQL] Create built-in functionality for variable substitution
## What changes were proposed in this pull request?
In order to fully merge the Hive parser and the SQL parser, we'd need to
support variable substitution in Spark. The implementation of the substitute
algorithm is mostly copied from Hive, but I simplified the overall structure
quite a bit and added more comprehensive test coverage.
## How was this patch tested?
Added VariableSubstitutionSuite for unit tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/rxin/spark SPARK-14769
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/12538.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 #12538
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commit 02274e70c3d1f51504d6f17052f29bf60df3dde8
Author: Reynold Xin <[email protected]>
Date: 2016-04-20T21:44:33Z
[SPARK-14769][SQL] Create built-in functionality for variable substitution
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