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https://issues.apache.org/jira/browse/FLINK-2148?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17329572#comment-17329572
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Flink Jira Bot commented on FLINK-2148:
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This issue is assigned but has not received an update in 7 days so it has been
labeled "stale-assigned". If you are still working on the issue, please give an
update and remove the label. If you are no longer working on the issue, please
unassign so someone else may work on it. In 7 days the issue will be
automatically unassigned.
> Approximately calculate the number of distinct elements of a stream
> -------------------------------------------------------------------
>
> Key: FLINK-2148
> URL: https://issues.apache.org/jira/browse/FLINK-2148
> Project: Flink
> Issue Type: New Feature
> Components: API / DataStream
> Reporter: Gábor Gévay
> Assignee: Gábor Gévay
> Priority: Minor
> Labels: approximate, stale-assigned, stale-minor, statistics
>
> In the paper
> http://people.seas.harvard.edu/~minilek/papers/f0.pdf
> Kane et al. describes an optimal algorithm for estimating the number of
> distinct elements in a data stream.
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