[jira] [Commented] (FLINK-8255) Key expressions on named row types do not work

["Sergey Nuyanzin (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-8255?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16457643#comment-16457643 ] 

Sergey Nuyanzin commented on FLINK-8255:
----------------------------------------

Hello [~twalthr]
Could I pick this issue up if you do not mind?

> Key expressions on named row types do not work
> ----------------------------------------------
>
>                 Key: FLINK-8255
>                 URL: https://issues.apache.org/jira/browse/FLINK-8255
>             Project: Flink
>          Issue Type: Bug
>          Components: DataSet API, DataStream API
>    Affects Versions: 1.4.0, 1.5.0
>            Reporter: Timo Walther
>            Priority: Major
>
> The following program fails with a {{ClassCastException}}. It seems that key expressions and rows are not tested well. We should add more tests for them.
> {code}
> final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
> TypeInformation[] types = new TypeInformation[] {Types.INT, Types.INT};
> String[] fieldNames = new String[]{"id", "value"};
> RowTypeInfo rowTypeInfo = new RowTypeInfo(types, fieldNames);
> env.fromCollection(Collections.singleton(new Row(2)), rowTypeInfo)
> .keyBy("id").sum("value").print();
> env.execute("Streaming WordCount");
> {code}



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