[jira] [Commented] (HIVE-5784) Group By Operator doesn't carry forward table aliases in its RowResolver

["Harish Butani (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-5784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13817617#comment-13817617 ] 

Harish Butani commented on HIVE-5784:
-------------------------------------

Review request: https://reviews.apache.org/r/15361/

> Group By Operator doesn't carry forward table aliases in its RowResolver
> ------------------------------------------------------------------------
>
>                 Key: HIVE-5784
>                 URL: https://issues.apache.org/jira/browse/HIVE-5784
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Harish Butani
>            Assignee: Harish Butani
>         Attachments: HIVE-5784.1.patch
>
>
> The following queries fails:
> {code}
> select b.key, count(*) from src b group by key
> select key, count(*) from src b group by b.key
> {code}
> with a SemanticException; the select expression b.key (key in the 2nd query) are not resolved by the GBy RowResolver.
> This is because the GBy RowResolver only supports resolving based on an AST.toStringTree match. Underlying issue is that a RowResolver doesn't allow multiple mappings to the same ColumnInfo.



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