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https://issues.apache.org/jira/browse/IGNITE-17813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17623113#comment-17623113
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Stanislav Lukyanov commented on IGNITE-17813:
---------------------------------------------

Also, I kinda think this is not a blocker for beta. The case that doesn't work 
is pretty straightforward (ORDER BY breaks if it sorts using a sorted index), 
so it's easy to just call it out in release notes. Also, I suspect there is a 
WA - just add a wrapping the original query with another one, like
{code:java}
select * from ( select * from T order by indexed_col ) order by indexed_col 
{code}
So if you really need to get this query to run correctly (although slowly), you 
can.

[~xtern] thoughts?

> Sql. Introduce sorted reducer for IndexScanNode
> -----------------------------------------------
>
>                 Key: IGNITE-17813
>                 URL: https://issues.apache.org/jira/browse/IGNITE-17813
>             Project: Ignite
>          Issue Type: Improvement
>          Components: sql
>            Reporter: Konstantin Orlov
>            Assignee: Pavel Pereslegin
>            Priority: Major
>              Labels: ignite-3
>             Fix For: 3.0.0-beta1
>
>          Time Spent: 40m
>  Remaining Estimate: 0h
>
> This task is derived from IGNITE-17655 to reduce its scope.
> Currently, IgniteScanNode reads partition after partition which, obviously, 
> breaks the sorting order. We need to introduce wrapping cursor, which accepts 
> open cursors for every partition, and produce the sorted output.



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