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https://issues.apache.org/jira/browse/SPARK-27386?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16818457#comment-16818457
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Reynold Xin commented on SPARK-27386:
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[~rdblue] when will you fix this?
> Improve partition transform parsing
> -----------------------------------
>
> Key: SPARK-27386
> URL: https://issues.apache.org/jira/browse/SPARK-27386
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Ryan Blue
> Priority: Major
>
> SPARK-27181 adds support to the SQL parser for transformation functions in
> the {{PARTITION BY}} clause. The rules to match this are specific to
> transforms and can match only literals or qualified names (field references).
> This should be improved to match a broader set of expressions so that Spark
> can produce better error messages than an expected symbol list.
> For example, {{PARTITION BY (2 + 3)}} should produce "invalid transformation
> expression: 2 + 3" instead of "expecting qualified name".
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