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https://issues.apache.org/jira/browse/FLINK-14662?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16985857#comment-16985857
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Terry Wang commented on FLINK-14662:
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+1 for this issue. I'd like to fix it.
> Distinguish unknown CatalogTableStatistics and zero
> ---------------------------------------------------
>
> Key: FLINK-14662
> URL: https://issues.apache.org/jira/browse/FLINK-14662
> Project: Flink
> Issue Type: Improvement
> Components: Connectors / Hive, Table SQL / API
> Reporter: Kurt Young
> Priority: Major
>
> Currently UNKNOWN table stats is represented with zeros, which might confuse
> with KNOWN table stats with exactly 0 row count.
>
> We can use -1 to represent UNKNOWN instead.
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