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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