twalthr commented on a change in pull request #7664: [FLINK-11449][table]
Uncouple the Expression class from RexNodes.
URL: https://github.com/apache/flink/pull/7664#discussion_r255065688
##########
File path:
flink-table/flink-table-planner/src/main/scala/org/apache/flink/table/api/BatchTableEnvironment.scala
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@@ -414,15 +414,15 @@ abstract class BatchTableEnvironment(
* @tparam T The type of the [[DataSet]].
*/
protected def registerDataSetInternal[T](
- name: String, dataSet: DataSet[T], fields: Array[Expression]): Unit = {
+ name: String, dataSet: DataSet[T], fields: Array[PlannerExpression]):
Unit = {
Review comment:
If `PlannerExpression` would implement the `Expression` interface, we would
not need these big refactorings.
This also makes sense because a `PlannerExpression` is just a special kind
of expression, right?
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