Add a filter returning all document without a value in a field
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Key: LUCENE-3593
URL: https://issues.apache.org/jira/browse/LUCENE-3593
Project: Lucene - Java
Issue Type: New Feature
Components: core/search
Affects Versions: 3.6, 4.0
Reporter: Simon Willnauer
Fix For: 3.6, 4.0
In some situations it would be useful to have a Filter that simply returns all
document that either have at least one or no value in a certain field. We don't
have something like that out of the box and adding it seems straight forward.
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