Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3829#discussion_r136123743
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/api/TableEnvironment.scala
---
@@ -1002,4 +1124,28 @@ object TableEnvironment {
case d: DefinedFieldNames => d.getFieldIndices
case _ => TableEnvironment.getFieldIndices(tableSource.getReturnType)
}
+
+ /**
+ * Returns field names for a given [[TableSink]].
+ *
+ * @param tableSink The TableSink to extract field names from.
+ * @tparam A The type of the TableSink.
+ * @return An array holding the field names.
+ */
+ def getFieldNames[A](tableSink: TableSink[A]): Array[String] = tableSink
match {
--- End diff --
I don't think we need this method. We can get the field names directly via
`TableSink.getFieldNames()`
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