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Posted to issues@spark.apache.org by "Nicholas Chammas (JIRA)" <ji...@apache.org> on 2016/11/02 21:31:59 UTC
[jira] [Commented] (SPARK-16726) Improve `Union/Intersect/Except`
error messages on incompatible types
[ https://issues.apache.org/jira/browse/SPARK-16726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15630597#comment-15630597 ]
Nicholas Chammas commented on SPARK-16726:
------------------------------------------
I just hit this error in 2.0.1 and it was this JIRA that helped me figure out what was going on. Thanks for addressing this issue [~dongjoon]!
> Improve `Union/Intersect/Except` error messages on incompatible types
> ---------------------------------------------------------------------
>
> Key: SPARK-16726
> URL: https://issues.apache.org/jira/browse/SPARK-16726
> Project: Spark
> Issue Type: Improvement
> Reporter: Dongjoon Hyun
> Assignee: Dongjoon Hyun
> Priority: Minor
> Fix For: 2.1.0
>
>
> Currently, `UNION/INTERSECT/EXCEPT` query on incompatible types shows a misleading error message like `unresolved operator Union`. We had better show a more correct message. This will help users in the situation of [SPARK-16704|https://issues.apache.org/jira/browse/SPARK-16704]
> h4. Before
> {code}
> scala> sql("select 1,2,3 union (select 1,array(2),3)")
> org.apache.spark.sql.AnalysisException: unresolved operator 'Union;
> scala> sql("select 1,2,3 intersect (select 1,array(2),3)")
> org.apache.spark.sql.AnalysisException: unresolved operator 'Intersect;
> scala> sql("select 1,2,3 except (select 1,array(2),3)")
> org.apache.spark.sql.AnalysisException: unresolved operator 'Except;
> {code}
> h4. After
> {code}
> scala> sql("select 1,2,3 union (select 1,array(2),3)")
> org.apache.spark.sql.AnalysisException: Union can only be performed on tables with the compatible column types. The first table has `[IntegerType, IntegerType, IntegerType]` and second table has `[IntegerType, ArrayType(IntegerType,false), IntegerType]`. The 2th column is incompatible;
> scala> sql("select 1,2,3 intersect (select 1,array(2),3)")
> org.apache.spark.sql.AnalysisException: Intersect can only be performed on tables with the compatible column types. The first table has `[IntegerType, IntegerType, IntegerType]` and second table has `[IntegerType, ArrayType(IntegerType,false), IntegerType]`. The 2th column is incompatible;
> scala> sql("select 1,2,3 except (select 1,array(2),3)")
> org.apache.spark.sql.AnalysisException: Except can only be performed on tables with the compatible column types. The first table has `[IntegerType, IntegerType, IntegerType]` and second table has `[IntegerType, ArrayType(IntegerType,false), IntegerType]`. The 2th column is incompatible;
> {code}
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