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https://issues.apache.org/jira/browse/SOLR-8918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15248288#comment-15248288
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Dennis Gove commented on SOLR-8918:
-----------------------------------

I've confirmed that it's definitely this patch that caused the graph on the 
cloud tab to disappear but I've yet to figure out why it's disappeared. I 
suspect angular is doing something I didn't expect, particularly with the 
directive at 
https://github.com/apache/lucene-solr/blob/master/solr/webapp/web/js/angular/controllers/stream.js#L146

Am continuing to investigate.

> Add Streaming Expressions to the admin page
> -------------------------------------------
>
>                 Key: SOLR-8918
>                 URL: https://issues.apache.org/jira/browse/SOLR-8918
>             Project: Solr
>          Issue Type: New Feature
>          Components: UI, web gui
>            Reporter: Dennis Gove
>         Attachments: SOLR-8918.patch, SOLR-8918.patch, SOLR-8918.patch, 
> SOLR-8918.patch, SOLR-8918.patch, sample-display.png, sample-display.png
>
>
> Add to the admin page an ability to work with and view Streaming Expressions.
> This tab will appear under the Collection selection section and will work 
> similarly to the Query tab. On this page the user will be able to enter a 
> streaming expression for execution. The user can then execute the expression 
> against the collection and view all the results as they are returned from the 
> Stream handler. Along with this the user will be able to view the structure 
> of the expression in a graph-like layout. 
> If the user wishes to only view the expression structure without executing 
> the expression the user will be able to click an "Explain" button which will 
> show the structure. Included in the structure will be information about each 
> node (the expression for that node).



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