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https://issues.apache.org/jira/browse/CALCITE-5696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17721537#comment-17721537
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Julian Hyde commented on CALCITE-5696:
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Does BigQuery support trailing commas in other lists besides {{SELECT}} (e.g. 
{{GROUP BY}}, {{ORDER BY}}, {{PARTITION BY}}, {{USING}})?

> Support trailing comma in SELECT list for Babel parser (like BigQuery)
> ----------------------------------------------------------------------
>
>                 Key: CALCITE-5696
>                 URL: https://issues.apache.org/jira/browse/CALCITE-5696
>             Project: Calcite
>          Issue Type: Bug
>            Reporter: Steven Talbot
>            Priority: Major
>
> {code:java}
> select some_col, from my_table{code}
> works in BigQuery but does not parse in the babel parser. Probably no harm in 
> just making the babel parser able to parse that in general. But this is 
> needed for full support for Google standard SQL
> https://cloud.google.com/bigquery/docs/reference/standard-sql/lexical#trailing_commas



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