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

["Bogdan Raducanu (JIRA)" <ji...@apache.org>]

Bogdan Raducanu created SPARK-20854:
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             Summary: 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: Bug
          Components: SQL
    Affects Versions: 2.2.0
            Reporter: Bogdan Raducanu


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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