[jira] [Commented] (SPARK-20854) extend hint syntax to support any expression, not just identifiers or strings

["Felix Cheung (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-20854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16034115#comment-16034115 ] 

Felix Cheung commented on SPARK-20854:
--------------------------------------

seems like would be good to add support for the same in python/R as well

> extend hint syntax to support any expression, not just identifiers or strings
> -----------------------------------------------------------------------------
>
>                 Key: SPARK-20854
>                 URL: https://issues.apache.org/jira/browse/SPARK-20854
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.2.0
>            Reporter: Bogdan Raducanu
>            Assignee: Bogdan Raducanu
>            Priority: Blocker
>             Fix For: 2.2.0
>
>
> Currently the SQL hint syntax supports as parameters only identifiers while the Dataset hint syntax supports only strings.
> They should support any expression as parameters, for example numbers. This is useful for implementing other hints in the future.
> Examples:
> {code}
> df.hint("hint1", Seq(1, 2, 3))
> df.hint("hint2", "A", 10000)
> sql("select /*+ hint1((1,2,3)) */")
> sql("select /*+ hint2('A', 10000) */")
> {code}



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