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From Andreas Sewe <>
Subject Re: Lucene 4.x -> 5.x: Converting FieldValueFilter to FieldValueQuery
Date Thu, 05 Nov 2015 12:45:30 GMT
Hi Adrien,

thank you very much for your reply.

> FieldValueQuery is indeed the replacement. I you don't plan on adding other
> clauses to the boolean query, you can even run the FieldValueQuery directly
> through IndexSearcher, without wrapping it in a BooleanQuery.

yes, I have this working now.

> The fact that you need to index doc values is related to another change in
> which we removed Lucene's FieldCache and now recommend to use doc values
> instead. Until you reindex with doc values, you can temporarily use
> UninvertingReader[1] to have the same behaviour as in Lucene 4.x.

Is indexing doc values vs. UninvertingReader a space/time tradeoff? Or
is the general recommendation to index doc values and only resort to an
UninvertingReader when a full 4.x to 5.x conversion is to costly in
terms of dev. hours?

Best wishes,


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