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https://issues.apache.org/jira/browse/SOLR-9916?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15870438#comment-15870438
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Kevin Risden commented on SOLR-9916:
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With these operations, we should be able to support literal comparison literal? 
That should help on the SQL pushdown piece.

> Add arithmetic operations to the SelectStream
> ---------------------------------------------
>
>                 Key: SOLR-9916
>                 URL: https://issues.apache.org/jira/browse/SOLR-9916
>             Project: Solr
>          Issue Type: New Feature
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Joel Bernstein
>            Assignee: Dennis Gove
>         Attachments: SOLR-9916.patch, SOLR-9916.patch, SOLR-9916.patch, 
> SOLR-9916-precommit.patch
>
>
> One of the things that will be needed as the SQL implementation matures is 
> the ability to do arithmetic operations. For example:
> select (a+b) from x;
> select sum(a)+sum(b) from x;
> We will need to support arithmetic operations within the Streaming API to 
> support these types of operations.
> It looks like adding arithmetic operations to the SelectStream is the best 
> place to add this functionality.



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