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https://issues.apache.org/jira/browse/FLINK-6516?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kurt Young closed FLINK-6516.
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Resolution: Unresolved
> using real row count instead of dummy row count when optimizing plan
> --------------------------------------------------------------------
>
> Key: FLINK-6516
> URL: https://issues.apache.org/jira/browse/FLINK-6516
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: godfrey he
> Assignee: godfrey he
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Currently, the statistic of {{TableSourceTable}} is {{UNKNOWN}} mostly, and
> the statistic from {{ExternalCatalog}} maybe is null also. Actually, only
> each {{TableSource}} knows its statistic exactly, especial for
> {{FilterableTableSource}} and {{PartitionableTableSource}}. So we can add
> {{getTableStats}} method in {{TableSource}}, and use it in TableSourceScan's
> estimateRowCount method to get real row count.
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