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https://issues.apache.org/jira/browse/SPARK-21030?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16301014#comment-16301014
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Felix Cheung commented on SPARK-21030:
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any taker on this for 2.3.0?
> extend hint syntax to support any expression for Python and R
> -------------------------------------------------------------
>
> Key: SPARK-21030
> URL: https://issues.apache.org/jira/browse/SPARK-21030
> Project: Spark
> Issue Type: Improvement
> Components: PySpark, SparkR, SQL
> Affects Versions: 2.2.0
> Reporter: Felix Cheung
>
> See SPARK-20854
> we need to relax checks in
> https://github.com/apache/spark/blob/6cbc61d1070584ffbc34b1f53df352c9162f414a/python/pyspark/sql/dataframe.py#L422
> and
> https://github.com/apache/spark/blob/7f203a248f94df6183a4bc4642a3d873171fef29/R/pkg/R/DataFrame.R#L3746
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