ulysses-you commented on code in PR #42255:
URL: https://github.com/apache/spark/pull/42255#discussion_r1285328262
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sql/core/src/main/scala/org/apache/spark/sql/Dataset.scala:
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@@ -1407,7 +1407,15 @@ class Dataset[T] private[sql](
*/
@scala.annotation.varargs
def hint(name: String, parameters: Any*): Dataset[T] = withTypedPlan {
- UnresolvedHint(name, parameters, logicalPlan)
+ // parse string parameters into Expressions as ResolveHint requires all
the parameters to be
+ // expressions except the first one could be numeric. This logic matches
how sql hint is parsed
+ // and makes caller easier to pass string parameters in hint
specification, especially for
+ // other language bindings, such as PySpark.
+ val pars = parameters.map {
+ case s: String => sparkSession.sessionState.sqlParser.parseExpression(s)
Review Comment:
I mean we can add something like this, and by default we can tune this
config off.
```scala
val parsed = if (parseHintParameterAsExpression) {
parseExpression ...
} else {
origin
}
UnresolvedHint(name, parsed, child)
```
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