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-----Original Message----- From: Li Li [mailto:fancye...@gmail.com] Sent: 2012年6月28日 15:54 To: solr-user@lucene.apache.org Subject: Re: what is precisionStep and positionIncrementGap read "How it works" of http://lucene.apache.org/core/old_versioned_docs/versions/3_5_0/api/all/org/apache/lucene/search/NumericRangeQuery.html if you can read Chinese, I have a blog explaining the details of the implementation. http://blog.csdn.net/fancyerii/article/details/7256379 On Thu, Jun 28, 2012 at 3:51 PM, ZHANG Liang F <liang.f.zh...@alcatel-sbell.com.cn> wrote: > Thanks a lot, but the precisionStep is still very vague to me! Could you give > me a example? > > -----Original Message----- > From: Li Li [mailto:fancye...@gmail.com] > Sent: 2012年6月28日 11:25 > To: solr-user@lucene.apache.org > Subject: Re: what is precisionStep and positionIncrementGap > > 1. precisionStep is used for ranging query of Numeric Fields. see > http://lucene.apache.org/core/old_versioned_docs/versions/3_5_0/api/al > l/org/apache/lucene/search/NumericRangeQuery.html > 2. positionIncrementGap is used for phrase query of multi-value fields e.g. > doc1 has two titles. > title1: ab cd > title2: xy zz > if your positionIncrementGap is 0, then the position of the 4 terms are > 0,1,2,3. > if you search phrase "cd xy", it will hit. But you may think it > should not match > so you can adjust positionIncrementGap to a larger one. e.g. 100. > Then the positions now are 0,1,100,101. the phrase query will not match it. > > On Thu, Jun 28, 2012 at 10:00 AM, ZHANG Liang F > <liang.f.zh...@alcatel-sbell.com.cn> wrote: >> Hi, >> in the schema.xml, usually there will be fieldType definition like >> this: <fieldType name="int" class="solr.TrieIntField" >> precisionStep="0" omitNorms="true" positionIncrementGap="0"/> >> >> the precisionStep and positionIncrementGap is not very clear to me. Could >> you please elaborate more on these 2? >> >> Thanks! >> >> Liang
