[
https://issues.apache.org/jira/browse/FLINK-1112?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14213907#comment-14213907
]
Fabian Hueske commented on FLINK-1112:
--------------------------------------
I meant sorting on a key that was computed using a KeySelector.
I guess in most cases where a grouping key is computed using a KeySelector, the
same will be true for a sorting key.
For now, I would only support KeySelector sorting on KeySelector groupings (and
not on FieldPosition and ExpressionKey groupings) to keep things initially
simple. Instead of a Tuple2<GroupingKey, OriginalType>, we need a
Tuple3<GroupingKey, SortingKey, OriginalType> and the internal wrappers for
KeySelector grouping need to be duplicated to handle the Tuple3.
> Add GroupSorting with KeySelectors
> ----------------------------------
>
> Key: FLINK-1112
> URL: https://issues.apache.org/jira/browse/FLINK-1112
> Project: Flink
> Issue Type: Improvement
> Components: Java API, Scala API
> Reporter: Fabian Hueske
>
> Group sorting is currently only supported for field-index keys and not for
> KeySelectors.
> This feature was requested.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
