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https://issues.apache.org/jira/browse/NIFI-5809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16683230#comment-16683230
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ASF GitHub Bot commented on NIFI-5809:
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Github user ijokarumawak commented on the issue:
https://github.com/apache/nifi/pull/3163
Reviewing
> QueryRecord stops processing data if selecting only a single field and that
> field is null
> -----------------------------------------------------------------------------------------
>
> Key: NIFI-5809
> URL: https://issues.apache.org/jira/browse/NIFI-5809
> Project: Apache NiFi
> Issue Type: Bug
> Affects Versions: 1.9.0
> Reporter: Mark Payne
> Assignee: Mark Payne
> Priority: Major
>
> From the users@ mailing list, Mandeep Gill reported an issue where the
> following input to QueryRecord:
> \{"id": "129984bf31e025599c0e9232df5c7b7c", "price": 19.47}
> {"id": "a6cfcb7c7178b9d18c50f2f2dc41dab3", "price": null}
> Can cause problems with the following 2 queries:
> select count( *) from flowfile where price is null
> select price from flowfile
> I believe both of these queries are affected by the same issue: the query
> only looks at the "price" field and as soon as it encountered a null value
> there, it mistook that as a null record, meaning that it immediately throws
> out the record and thinks it's the end of the stream.
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