dianfu commented on a change in pull request #7196: [FLINK-10974] [table] Add
support for flatMap to table API
URL: https://github.com/apache/flink/pull/7196#discussion_r273045966
##########
File path:
flink-table/flink-table-planner/src/main/scala/org/apache/flink/table/plan/OperationTreeBuilder.scala
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@@ -376,6 +377,33 @@ class OperationTreeBuilder(private val tableEnv:
TableEnvironment) {
Project(expandedFields.map(UnresolvedAlias), childNode).validate(tableEnv)
}
+ def flatMap(tableFunction: Expression, child: TableOperation):
TableOperation = {
Review comment:
Good advice for using dropNode to remove the columns from the original
inputs. Regarding to the logic to solve duplicate field names, I think it is
still needed as input field names may be duplicate with the result field names
of table function. Thoughts?
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