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https://issues.apache.org/jira/browse/CALCITE-1587?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15828662#comment-15828662
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Gian Merlino commented on CALCITE-1587:
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Oops I commented on the wrong issue. Meant that for CALCITE-1588.
> Druid adapter: topN returns approximate results
> -----------------------------------------------
>
> Key: CALCITE-1587
> URL: https://issues.apache.org/jira/browse/CALCITE-1587
> Project: Calcite
> Issue Type: Bug
> Components: druid
> Affects Versions: 1.11.0
> Reporter: Jesus Camacho Rodriguez
> Assignee: Julian Hyde
> Fix For: 1.12.0
>
>
> Currently, we convert to _topN_ queries. However, metrics returned by Druid
> will be approximate values. Thus, probably we should not convert to Druid
> topN queries and rather always use Druid groupBy.
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