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From Chris Hostetter <hossman_luc...@fucit.org>
Subject Re: TrieField and FieldCache confusion
Date Wed, 31 Jul 2013 17:43:53 GMT

: Can I expect the FieldCache of Lucene to return the correct values when
: working
: with TrieField with the precisionStep higher than 0. If not, what did I get
: wrong?

Yes -- the code for building FieldCaches from Trie fields is smart enough 
to ensure that only the "real" original values are used to populate the 
Cache

(See for example: FieldCache.NUMERIC_UTILS_INT_PARSER and the classes 
linked to from it's javadocs...

https://lucene.apache.org/core/4_4_0/core/org/apache/lucene/search/FieldCache.html#NUMERIC_UTILS_INT_PARSER
https://lucene.apache.org/core/4_4_0/core/org/apache/lucene/util/NumericUtils.html
https://lucene.apache.org/core/4_4_0/core/org/apache/lucene/document/IntField.html

(Solr's Trie fields are backed by the various numeric fields in lucene -- 
ie: solr:TrieIntField -> lucene:IntField.  the "Trie*" prefix is used in 
solr because there already had classes named IntField, DoubleField, etc... 
when the Trie based impls where added to lucene)


-Hoss

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