GitHub user viirya opened a pull request:
https://github.com/apache/spark/pull/11204
[SPARK-13321][SQL] Support nested UNION in parser
JIRA: https://issues.apache.org/jira/browse/SPARK-13321
The following SQL can not be parsed with current parser:
SELECT `u_1`.`id` FROM (((SELECT `t0`.`id` FROM `default`.`t0`) UNION
ALL (SELECT `t0`.`id` FROM `default`.`t0`)) UNION ALL (SELECT `t0`.`id` FROM
`default`.`t0`)) AS u_1
We should fix it.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/viirya/spark-1 nested-union
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/11204.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 #11204
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commit 93bd51eba6a07468743e087ec137606d3ba588e6
Author: Liang-Chi Hsieh <vii...@gmail.com>
Date: 2016-02-15T06:04:22Z
Support nested UNION in parser.
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