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https://issues.apache.org/jira/browse/CALCITE-5846?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17785096#comment-17785096
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TJ Banghart commented on CALCITE-5846:
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Thanks for the test case [~jingda]! Opened
https://github.com/apache/calcite/pull/3515.
> Preserve filters on non-distinct aggCalls in AggregateExpandWithinDistinctRule
> ------------------------------------------------------------------------------
>
> Key: CALCITE-5846
> URL: https://issues.apache.org/jira/browse/CALCITE-5846
> Project: Calcite
> Issue Type: Bug
> Reporter: Steven Talbot
> Assignee: TJ Banghart
> Priority: Major
> Labels: pull-request-available
>
> This line
> [https://github.com/apache/calcite/blob/2dba40e7a0a5651eac5a30d9e0a72f178bd9bff2/core/src/main/java/org/apache/calcite/rel/rules/AggregateExpandWithinDistinctRule.java#L346-L348]
> drops any such filterArg.
> Related to CALCITE-4726. When the rule was first introduced any such
> aggregates were blocked, but that change lets them through.
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