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https://issues.apache.org/jira/browse/DRILL-6129?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16358178#comment-16358178
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ASF GitHub Bot commented on DRILL-6129:
---------------------------------------

Github user asfgit closed the pull request at:

    https://github.com/apache/drill/pull/1106


> Query fails on nested data type schema change
> ---------------------------------------------
>
>                 Key: DRILL-6129
>                 URL: https://issues.apache.org/jira/browse/DRILL-6129
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Client - CLI
>    Affects Versions: 1.10.0
>            Reporter: salim achouche
>            Assignee: salim achouche
>            Priority: Minor
>              Labels: ready-to-commit
>             Fix For: 1.13.0
>
>
> Use-Case -
>  * Assume two parquet files with similar schemas except for a nested column
>  * Schema file1
>  ** int64 field1
>  ** optional group field2
>  *** optional group field2.1 (LIST)
>  **** repeated group list
>  ***** optional group element
>  ****** optional int64 child_field
>  * Schema file2
>  ** int64 field1
>  ** optional group field2
>  *** optional group field2.1 (LIST)
>  **** repeated group list
>  ***** optional group element
>  ****** optional group child_field
>  ******* optional int64 child_field_f1
>  ******* optional int64 child_field_f1
>  * Essentially child_field changed from an int64 to a group of fields
>  
> Observed Query Failure
> select * from <file1 and file2>;
> Error: Unexpected RuntimeException: java.lang.IllegalArgumentException: The 
> field $bits$(UINT1:REQUIRED) doesn't match the provided metadata major_type {
>   minor_type: MAP
>   mode: REQUIRED
> Note that selecting one file at a time succeeds which seems to indicate the 
> issue has to do with the schema change logic. 
>  
>  



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