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https://issues.apache.org/jira/browse/CALCITE-3568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16988996#comment-16988996
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Stamatis Zampetakis commented on CALCITE-3568:
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Thanks for working on this [~divyanshu.s95]. Do you have a reference that shows
that the respective dialects do not support nested aggregates?
> BigQuery, Hive, Spark SQL dialect don'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
> Assignee: Divyanshu Srivastava
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.22.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> The BigQuerySqlDialect, HiveSqlDialect, SparkSqlDialect do not support nested
> aggregates, hence overriding the supportsNestedAggregations() method in them.
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