KurtYoung commented on a change in pull request #8179: [FLINK-12200]
[Table-planner] Support UNNEST for MAP types
URL: https://github.com/apache/flink/pull/8179#discussion_r278783132
##########
File path:
flink-table/flink-table-planner/src/main/scala/org/apache/flink/table/plan/util/ExplodeFunctionUtil.scala
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@@ -54,6 +55,15 @@ abstract class ExplodeTableFunction[T] extends
TableFunction[T] {
}
}
+class MapExplodeTableFunc extends TableFunction[Object]{
Review comment:
`ObjectExplodeTableFunc` is not directly used by all arrays which want to be
unnested. It's only used by the array which has object array element type,
.e.g. Array(object[]).
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