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https://issues.apache.org/jira/browse/FLINK-4599?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15476313#comment-15476313
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Fabian Hueske commented on FLINK-4599:
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The batch explain is using the JSON output of the DataSet optimizer. There is
no equivalent component in the DataStream API (DataStream programs are deployed
as they are specified). So the implementation of the streaming explain will be
different from the batch explain. The explain plan could be created from the
RelNode plan.
> Add 'explain()' also to StreamTableEnvironment
> ----------------------------------------------
>
> Key: FLINK-4599
> URL: https://issues.apache.org/jira/browse/FLINK-4599
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Timo Walther
> Assignee: Simone Robutti
> Labels: starter
>
> Currenlty, only the BatchTableEnvironment supports the {{explain}} command
> for tables. We should also support it for the StreamTableEnvironment.
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