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https://issues.apache.org/jira/browse/CALCITE-3568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16988563#comment-16988563
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Rui Wang commented on CALCITE-3568:
-----------------------------------
You will need to ask in dev@ to add you to JIRA list/group. But it's ok. You
can link your PR to this JIRA, that will also be good enough.
> BigQuery, Hive, Spark SQL dialect doesn't support nested aggregates
> -------------------------------------------------------------------
>
> Key: CALCITE-3568
> URL: https://issues.apache.org/jira/browse/CALCITE-3568
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Divyanshu Srivastava
> Priority: Major
>
> The BigQuerySqlDialect, HiveSqlDialect, SparkSqlDialect do not support nested
> aggregates, hence overriding the supportsNestedAggregations() method in them.
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