[jira] [Commented] (SPARK-7149) Defalt system alias problem

["Adrian Wang (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-7149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14520764#comment-14520764 ] 

Adrian Wang commented on SPARK-7149:
------------------------------------

what's the schema of your testData table?

I have tried the one defined in TestData.scala, which is defined as case class TestData(key: Int, value: String), and I get no exception.

Is this because you have a `c0` in your testData schema?

> Defalt system alias problem
> ---------------------------
>
>                 Key: SPARK-7149
>                 URL: https://issues.apache.org/jira/browse/SPARK-7149
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>            Reporter: haiyang
>
> Fix default system alias problem.
> execute the sql statement will cause problem: 
> select substr(concat('value', value), 1, 3), key as c0 from testData order by c0
> org.apache.spark.sql.AnalysisException: Reference 'c0' is ambiguous, could be: c0#42, c0#41.;



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