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https://issues.apache.org/jira/browse/FLINK-2148?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Konstantin Knauf reopened FLINK-2148:
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Re-opening in accordance with https://issues.apache.org/jira/browse/FLINK-23206.
> 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
> Priority: Minor
> Labels: approximate, auto-closed, auto-unassigned, 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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