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https://issues.apache.org/jira/browse/CALCITE-3287?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hong Shen updated CALCITE-3287:
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Description:
when I read the RelMdRowCount.java, I found that union's getRowCount has not
consider 'union all', while in Union.estimateRowCount has. can any body tell me
why？
```
```
was:when I read the RelMdRowCount.java, I found that union's getRowCount has
not concern 'union all', while in Union.estimateRowCount has. can any body tell
me why？
> Union's getRowCount in RelMdRowCount has not consider 'union all'
> -----------------------------------------------------------------
>
> Key: CALCITE-3287
> URL: https://issues.apache.org/jira/browse/CALCITE-3287
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Hong Shen
> Priority: Minor
>
> when I read the RelMdRowCount.java, I found that union's getRowCount has not
> consider 'union all', while in Union.estimateRowCount has. can any body tell
> me why？
> ```
> ```
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