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https://issues.apache.org/jira/browse/SOLR-13560?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joel Bernstein updated SOLR-13560:
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Attachment: SOLR-13560.patch
> Add isNull and notNull Stream Evaluators
> ----------------------------------------
>
> Key: SOLR-13560
> URL: https://issues.apache.org/jira/browse/SOLR-13560
> Project: Solr
> Issue Type: New Feature
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Joel Bernstein
> Priority: Major
> Attachments: SOLR-13560.patch
>
>
> This ticket adds two Stream Evaluators for testing for null values in Tuples.
> These are much needed functions as currently null values are not possible to
> detect with the *eq* Stream Evaluator because null values are evaluated to
> the parameter name, rather then null. This change was made to support String
> literal parameters without quotes.
> The isNull and notNull Stream Evaluators properly detect nulls so they can be
> used to filter tuples in a *having* expression or replace nulls in a *select*
> expression.
> Sample syntax:
> {code:java}
> having(random(testapp, q="*:*", fl="response_d", rows="20000"),
> notNull(response_d)){code}
>
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