godfreyhe commented on a change in pull request #15559:
URL: https://github.com/apache/flink/pull/15559#discussion_r613803148
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File path:
flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/planner/plan/utils/RelExplainUtil.scala
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@@ -858,4 +859,28 @@ object RelExplainUtil {
case (k, v) => s"$k = (${v.mkString(", ")})"
}.mkString(", ")
+ /**
+ * Converts [[RelHint]]s to String.
+ */
+ def hintsToString(hints: util.List[RelHint]): String = {
Review comment:
The difference between the result of this method and `hints.toString()`
is we ignore the `inheritPath` if it's empty in this method. Because most case,
the inheritPath is empty, and the result of this method is much simpler.
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