1. precisionStep is used for ranging query of Numeric Fields. see http://lucene.apache.org/core/old_versioned_docs/versions/3_5_0/api/all/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
