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https://issues.apache.org/jira/browse/FLINK-1778?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14711362#comment-14711362
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Stephan Ewen commented on FLINK-1778:
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Has not been addressed
> Improve normalized keys in composite key case
> ---------------------------------------------
>
> Key: FLINK-1778
> URL: https://issues.apache.org/jira/browse/FLINK-1778
> Project: Flink
> Issue Type: Improvement
> Components: Local Runtime
> Affects Versions: 0.9
> Reporter: Stephan Ewen
> Assignee: Stephan Ewen
> Fix For: 0.9
>
>
> Currently, if we have a key (String, long), the String will take up the
> entire normalized key space, without being fully discerning anyways. Limiting
> the key prefix in size and giving space to the second key field should in
> most cases improve the comparison efficiency.
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