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https://issues.apache.org/jira/browse/FLINK-7923?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16351189#comment-16351189
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ASF GitHub Bot commented on FLINK-7923:
---------------------------------------

Github user suez1224 commented on the issue:

    https://github.com/apache/flink/pull/5367
  
    @hequn8128 @twalthr could you please take another look? I've refactored the 
code to reuse the generateFieldAccess() code, also added null test. Nested 
tuple wont work now due to https://issues.apache.org/jira/browse/CALCITE-2162. 
I've submitted a PR to fix it in Calcite.


> SQL parser exception when accessing subfields of a Composite element in an 
> Object Array type column
> ---------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-7923
>                 URL: https://issues.apache.org/jira/browse/FLINK-7923
>             Project: Flink
>          Issue Type: Bug
>          Components: Table API & SQL
>    Affects Versions: 1.4.0
>            Reporter: Rong Rong
>            Assignee: Shuyi Chen
>            Priority: Major
>
> Access type such as:
> {code:SQL}
> SELECT 
>   a[1].f0 
> FROM 
>   MyTable
> {code}
> will cause problem. 
> See following test sample for more details:
> https://github.com/walterddr/flink/commit/03c93bcb0fb30bd2d327e35b5e244322d449b06a



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