GitHub user dereksabryfb opened a pull request:
https://github.com/apache/spark/pull/10137
[SPARK-12139][SQL] REGEX Column Specification for Hive Queries
When executing a query of the form
Select `(a)?.` from A,
Hive interprets this query as a regular expression, which can be supported
in the hive parser for spark
If a columns is specified in backticks (eg. (ds)?+.+), the hive parser will
treat that as a regular expression and 'expand' the columns similar to a *, on
columns that match the regex.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dereksabryfb/spark regex_columns
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/10137.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 #10137
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commit 65191fe0887049d2821b250d32bcdb338433c8aa
Author: Derek Sabry <[email protected]>
Date: 2015-12-03T23:15:38Z
REGEX Column Specification for Hive Queries
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