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https://issues.apache.org/jira/browse/VXQUERY-147?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14590900#comment-14590900
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Preston Carman commented on VXQUERY-147:
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For Q14, the EliminateUnnestAggregateSubplanRule rewrite rule should be 
updated. The current rule requires UNNEST iterate to be applied. The rule 
should be relaxed to work off any UNNEST expression.

> [ERROR] Rewrite Rule for Collection
> -----------------------------------
>
>                 Key: VXQUERY-147
>                 URL: https://issues.apache.org/jira/browse/VXQUERY-147
>             Project: VXQuery
>          Issue Type: Bug
>            Reporter: Shivani Mall
>              Labels: gsoc2015, xmark
>         Attachments: collectn_rr_q10_q14.txt
>
>
> There is some error in the subplan while dealing with the rewrite rule for 
> collection. This makes XMark queries 10 and 14 to fail. 
> Error and Optimized Query plans for both the queries attached.



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