GitHub user viirya opened a pull request:
https://github.com/apache/spark/pull/11361
[SPARK-13321][SQL] Support nested UNION in parser
JIRA: https://issues.apache.org/jira/browse/SPARK-13321
## What changes were proposed in this pull request?
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.
## How was this patch tested?
New tests are added to CatalystQlSuite and HiveQuerySuite.
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/11361.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 #11361
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commit 93bd51eba6a07468743e087ec137606d3ba588e6
Author: Liang-Chi Hsieh <[email protected]>
Date: 2016-02-15T06:04:22Z
Support nested UNION in parser.
commit f462997728021f1f2e1091ceb38cbc7caddd5e12
Author: Liang-Chi Hsieh <[email protected]>
Date: 2016-02-15T13:38:43Z
Test actual parsed plan.
commit 190b326ab4c23da0ed7ebf8f7254dc8a60ea1e84
Author: Liang-Chi Hsieh <[email protected]>
Date: 2016-02-15T15:15:08Z
Support recursively nested one.
commit a00261de3651dfd7f3ec60633f55768c00dd99f0
Author: Liang-Chi Hsieh <[email protected]>
Date: 2016-02-21T13:00:00Z
Merge remote-tracking branch 'upstream/master' into nested-union
commit d024fff0e729ce12b4da67cb7cf922c5bbf53186
Author: Liang-Chi Hsieh <[email protected]>
Date: 2016-02-21T13:08:38Z
Merge remote-tracking branch 'upstream/master' into nested-union
Conflicts:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/CatalystQlSuite.scala
commit 1e34c443237775636cb185af12294739c67cd617
Author: Liang-Chi Hsieh <[email protected]>
Date: 2016-02-25T02:32:25Z
Merge remote-tracking branch 'upstream/master' into nested-union
commit 5ff5ac2c336c63d718c98e27216c7510b6ab4b64
Author: Liang-Chi Hsieh <[email protected]>
Date: 2016-02-25T03:42:12Z
Add unit test.
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