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https://issues.apache.org/jira/browse/FLINK-4605?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17336852#comment-17336852
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Flink Jira Bot commented on FLINK-4605:
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This issue was labeled "stale-major" 7 ago and has not received any updates so
it is being deprioritized. If this ticket is actually Major, please raise the
priority and ask a committer to assign you the issue or revive the public
discussion.
> Add an expression that returns the return type of an expression
> ---------------------------------------------------------------
>
> Key: FLINK-4605
> URL: https://issues.apache.org/jira/browse/FLINK-4605
> Project: Flink
> Issue Type: New Feature
> Components: Table SQL / API
> Reporter: Timo Walther
> Priority: Major
> Labels: stale-major
>
> Esp. for Java users of the Table API it is hard to obtain the return type of
> an expression. I propose to implement an expression that returns the type of
> an input expression as a string.
> {{myLong.getType()}} could call the toString method of TypeInformation.
> This could also be useful to distinguish between different subtypes of POJOs
> etc.
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