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https://issues.apache.org/jira/browse/SPARK-9181?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Armbrust resolved SPARK-9181.
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Resolution: Won't Fix
I'm sorry, but I don't think there is much we can do here as the limitation is
with parquet. The default aliases are really only for interactive use. I'd
suggest that you use {{as}} or {{alias}} to rename the column.
> round bracket used in naming aggregations is not allowed by parquet writer
> --------------------------------------------------------------------------
>
> Key: SPARK-9181
> URL: https://issues.apache.org/jira/browse/SPARK-9181
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.4.0
> Reporter: Mohit Jaggi
> Priority: Minor
>
> round bracket used in naming aggregations is not allowed by parquet writer.
> so one has to rename the aggregate columns before writing to parquet.
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