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https://issues.apache.org/jira/browse/FLINK-3941?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15298073#comment-15298073
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ASF GitHub Bot commented on FLINK-3941:
---------------------------------------
Github user yjshen commented on a diff in the pull request:
https://github.com/apache/flink/pull/2025#discussion_r64377174
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/api/table/runtime/aggregate/AggregateMapFunction.scala
---
@@ -44,7 +44,7 @@ class AggregateMapFunction[IN, OUT](
override def map(value: IN): OUT = {
- val input = value.asInstanceOf[Row]
+ val input = value.asInstanceOf[Product]
--- End diff --
Ah, I think I get why this happen, will fix this.
> Add support for UNION (with duplicate elimination)
> --------------------------------------------------
>
> Key: FLINK-3941
> URL: https://issues.apache.org/jira/browse/FLINK-3941
> Project: Flink
> Issue Type: New Feature
> Components: Table API
> Affects Versions: 1.1.0
> Reporter: Fabian Hueske
> Assignee: Yijie Shen
> Priority: Minor
>
> Currently, only UNION ALL is supported by Table API and SQL.
> UNION (with duplicate elimination) can be supported by applying a
> {{DataSet.distinct()}} after the union on all fields. This issue includes:
> - Extending {{DataSetUnion}}
> - Relaxing {{DataSetUnionRule}} to translated non-all unions.
> - Extend the Table API with union() method.
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