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https://issues.apache.org/jira/browse/LUCENE-7659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15838904#comment-15838904
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ASF subversion and git services commented on LUCENE-7659:
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Commit 733060121dc6f5cbc1b0e0e1412e396a3241240b in lucene-solr's branch
refs/heads/master from [~ichattopadhyaya]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=7330601 ]
LUCENE-7659: Added IndexWriter#getFieldNames() to return all visible field names
> IndexWriter should expose field names
> -------------------------------------
>
> Key: LUCENE-7659
> URL: https://issues.apache.org/jira/browse/LUCENE-7659
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Ishan Chattopadhyaya
> Assignee: Ishan Chattopadhyaya
> Attachments: LUCENE-7659.patch, LUCENE-7659.patch, LUCENE-7659.patch,
> LUCENE-7659.patch, LUCENE-7659.patch
>
>
> While working on SOLR-5944, I needed a way to know whether applying an update
> to a DV is possible (i.e. the DV exists or not), while deciding upon whether
> or not to apply the update as an in-place update or a regular full document
> update. This information is present at the IndexWriter in a FieldInfos
> instance, and can be exposed.
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