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https://issues.apache.org/jira/browse/IMPALA-13615?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17906469#comment-17906469
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Surya Hebbar commented on IMPALA-13615:
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With row grouping based on fragment's name, it becomes easier to distinguish
one fragment's instance from the other.
The sorting of instances can still be done based on different columns, this
splits and orders the rows only based on column's values.
!instances_with_row_groupping.png|height=600!
> Support row grouping of instances based on fragment names
> ---------------------------------------------------------
>
> Key: IMPALA-13615
> URL: https://issues.apache.org/jira/browse/IMPALA-13615
> Project: IMPALA
> Issue Type: New Feature
> Reporter: Surya Hebbar
> Assignee: Surya Hebbar
> Priority: Major
> Attachments: instances_with_row_groupping.png,
> instances_without_row_groupping.png
>
>
> In the "Fragment Instances" page of a query, currently the rows can be sorted
> in lexicographical order based on any column.
> Even though it is possible to sort the rows based on the fragment's name, it
> is difficult to distinguish between fragments and their instances.
> !instances_without_row_groupping.png|height=200!
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