[jira] [Resolved] (SPARK-16850) Improve error message for greatest/least

["Wenchen Fan (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-16850?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wenchen Fan resolved SPARK-16850.
---------------------------------
       Resolution: Fixed
    Fix Version/s: 2.1.0

Issue resolved by pull request 14453
[https://github.com/apache/spark/pull/14453]

> Improve error message for greatest/least
> ----------------------------------------
>
>                 Key: SPARK-16850
>                 URL: https://issues.apache.org/jira/browse/SPARK-16850
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>            Reporter: Peter Lee
>             Fix For: 2.1.0
>
>
> Greatest/least function does not have the most friendly error message for data types:
> Error in SQL statement: AnalysisException: cannot resolve 'greatest(CAST(1.0 AS DECIMAL(2,1)), "1.0")' due to data type mismatch: The expressions should all have the same type, got GREATEST (ArrayBuffer(DecimalType(2,1), StringType)).; line 1 pos 7
> We should report the human readable data type instead, rather than having "ArrayBuffer" and "StringType".



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