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https://issues.apache.org/jira/browse/SOLR-8602?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15120429#comment-15120429
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Joel Bernstein commented on SOLR-8602:
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I believe in the case of the /export handler numerics will never be null. This
is because numerics are read from NumericDocValues which I believe treats nulls
as 0. But as you proven with the test case the /select handler will return null
values for numerics.
I was surprised to see that you could put a null value in an int field and that
would behave properly. I'm assuming the field is not added to the document if
the field value is null.
> Implement ResultSetImpl.wasNull()
> ---------------------------------
>
> Key: SOLR-8602
> URL: https://issues.apache.org/jira/browse/SOLR-8602
> Project: Solr
> Issue Type: Sub-task
> Components: SolrJ
> Affects Versions: Trunk
> Reporter: Kevin Risden
> Assignee: Joel Bernstein
> Fix For: Trunk
>
> Attachments: SOLR-8602.patch, SOLR-8602.patch, SOLR-8602.patch
>
>
> ResultSetImpl.wasNull is necessary for SQL clients to display a SQL NULL
> instead of 0 or false for certain get* commands.
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