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https://issues.apache.org/jira/browse/QPID-8761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18117209#comment-18117209
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ASF GitHub Bot commented on QPID-8761:
--------------------------------------
dakirily opened a new pull request, #448:
URL: https://github.com/apache/qpid-broker-j/pull/448
This PR addresses JIRA
[QPID-8761](https://issues.apache.org/jira/browse/QPID-8761), improving null
handling in query-engine comparison expressions
> [Broker-J] QueryEvaluationException: Objects of types 'null' and 'String' can
> not be compared
> ---------------------------------------------------------------------------------------------
>
> Key: QPID-8761
> URL: https://issues.apache.org/jira/browse/QPID-8761
> Project: Qpid
> Issue Type: Bug
> Components: Broker-J
> Affects Versions: qpid-java-broker-10.1.0
> Reporter: Daniil Kirilyuk
> Assignee: Daniil Kirilyuk
> Priority: Minor
> Fix For: qpid-java-broker-10.1.1
>
>
> There are following error messages seen in broker log:
> {code:java}
> [qtp598563976-3016] (o.a.q.s.m.p.s.r.QueryServlet) - Error when executing
> query '{"sql":"select count(*) as cnt from producer where destination =
> '<QUEUE_NAME>' and destinationType =
> 'QUEUE'","dateTimeFormat":"LONG"}'org.apache.qpid.server.query.engine.exception.QueryEvaluationException:
> Objects of types 'null' and 'String' can not be compared {code}
> The queue exists, but has size of 1 message, with no producer or consumer.
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