GitHub user haiyangsea opened a pull request:
https://github.com/apache/spark/pull/5861
[SPARK-7149] [SQL] Fix system default alias problem
executing the following sql statement will throw exception:
```sql
select key as havingCondition from testData group by key having key >
count(*)
```
org.apache.spark.sql.AnalysisException: Reference 'havingCondition' is
ambiguous, could be: havingCondition#42, havingCondition#41.
```sql
select substr(value, 0, 2), key as c0 from testData order by c0 desc limit 2
```
org.apache.spark.sql.AnalysisException: Reference 'c0' is ambiguous, could
be: c0#42, c0#41.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/haiyangsea/spark alias
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/5861.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 #5861
----
commit 620473eac8c2b519a67b183890cc05207fd81436
Author: haiyang <[email protected]>
Date: 2015-04-26T07:09:45Z
fix system default alias problem
----
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