[jira] [Commented] (FLINK-5676) Grouping on nested fields does not work

["Timo Walther (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-5676?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15842873#comment-15842873 ] 

Timo Walther commented on FLINK-5676:
-------------------------------------

SQL has the same issue: 

{code}
tEnv.sql("SELECT * FROM testing GROUP BY testing.innerPojo.line");
{code}

leads to

{code}
Expression 'testing.innerPojo' is not being grouped
{code}

> Grouping on nested fields does not work
> ---------------------------------------
>
>                 Key: FLINK-5676
>                 URL: https://issues.apache.org/jira/browse/FLINK-5676
>             Project: Flink
>          Issue Type: Bug
>          Components: Table API & SQL
>            Reporter: Timo Walther
>
> {code}
> tEnv
>   .fromDataSet(pojoWithinnerPojo)
>   .groupBy("innerPojo.get('line')")
>   .select("innerPojo.get('line')")
> {code}
> fails with 
> {code}
> ValidationException: Cannot resolve [innerPojo] given input ['innerPojo.get(line)].
> {code}
> I don't know if we want to support that but the exception should be more helpful anyway.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)