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From "Hyukjin Kwon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-27170) Better error message for syntax error with extraneous comma in the SQL parser
Date Thu, 21 Mar 2019 08:06:00 GMT

    [ https://issues.apache.org/jira/browse/SPARK-27170?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16797906#comment-16797906
] 

Hyukjin Kwon commented on SPARK-27170:
--------------------------------------

Shall we resolve the JIRA then?

> Better error message for syntax error with extraneous comma in the SQL parser
> -----------------------------------------------------------------------------
>
>                 Key: SPARK-27170
>                 URL: https://issues.apache.org/jira/browse/SPARK-27170
>             Project: Spark
>          Issue Type: Wish
>          Components: SQL
>    Affects Versions: 2.4.0
>            Reporter: Wataru Yukawa
>            Priority: Minor
>
> [~maropu], [~smilegator]
> It was great to talk with you in Hadoop / Spark Conference Japan 2019.
> Thanks in advance!
> I filed this issue which I talked with you at that time.
> We sometimes write a syntax error SQL with extraneous comma by mistake.
> For example, here is the SQL with an extraneous comma in line 2.
> {code}
> SELECT distinct
> ,a
> ,b
> ,c
> FROM ...' LIMIT 100
> {code}
> We have an error message in spark 2.4.0 but it's a little hard to understand in my feeling
because line number is wrong.
> {code}
> cannot resolve '`distinct`' given input columns: [...]; line 1 pos 7;
> 'GlobalLimit 100
> +- 'LocalLimit 100
> +- 'Project ['distinct, ...]
> +- Filter (...)
> +- SubqueryAlias ...
> +- HiveTableRelation ...
> {code}
> By the way, here is the error message in prestosql 305 and same sql.
> Line number is correct and I guess an error message is better than sparksql.
> {code}
> line 2:5: mismatched input ','. Expecting: '*', <expression>, <identifier>
> {code}
> If sparksql error message improves, it would be great.
> Thanks.
>  



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