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From "Joel Bernstein (JIRA)" <>
Subject [jira] [Commented] (SOLR-9916) Add arithmetic operations to the SelectStream
Date Fri, 06 Jan 2017 01:29:58 GMT


Joel Bernstein commented on SOLR-9916:

Looks really good to me.

I'm just about to commit a small change so that LeafOperations can accept a metric identifier
without single quotes. Currently you have to do the following or the parser will parse the
metric and not know how to use it as a value operand.

having(expr, eq('sum(a_i)', 9))

After this small commit it will support:

having(expr, eq(sum(a_i), 9))

This will just be relevant for Solr 6.4 which is coming in a few days.

The work you're doing on this ticket will supersede this change but it's nice to have for

> Add arithmetic operations to the SelectStream
> ---------------------------------------------
>                 Key: SOLR-9916
>                 URL:
>             Project: Solr
>          Issue Type: New Feature
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Joel Bernstein
> 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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