C# Class Lucene.Net.QueryParsers.Classic.MultiFieldQueryParser

Creates a MultiFieldQueryParser. It will, when QueryParserBase.Parse(string) is called, construct a query like this (assuming the query consists of two terms and you specify the two fields title and body): (title:term1 body:term1) (title:term2 body:term2) When QueryParserBase.DefaultOperator is set to QueryParserBase.AND_OPERATOR, the result will be: +(title:term1 body:term1) +(title:term2 body:term2) In other words, all the query's terms must appear, but it doesn't matter in what fields they appear.

Creates a MultiFieldQueryParser. Allows passing of a map with term to Boost, and the boost to apply to each term. It will, when QueryParserBase.Parse(string) is called, construct a query like this (assuming the query consists of two terms and you specify the two fields title and body): (title:term1 body:term1) (title:term2 body:term2) When QueryParserBase.DefaultOperator is set to QueryParserBase.AND_OPERATOR, the result will be: +(title:term1 body:term1) +(title:term2 body:term2) When you pass a boost (title=>5 body=>10) you can get +(title:term1^5.0 body:term1^10.0) +(title:term2^5.0 body:term2^10.0) In other words, all the query's terms must appear, but it doesn't matter in what fields they appear.

Parses a query which searches on the fields specified. If x fields are specified, this effectively constructs: (field1:query1) (field2:query2) (field3:query3)...(fieldx:queryx)

Parses a query, searching on the fields specified. Use this if you need to specify certain fields as required, and others as prohibited. Usage: string[] fields = {"filename", "contents", "description"}; BooleanClause.Occur[] flags = {BooleanClause.Occur.SHOULD, BooleanClause.Occur.MUST, BooleanClause.Occur.MUST_NOT}; MultiFieldQueryParser.Parse("query", fields, flags, analyzer); The code above would construct a query: (filename:query) +(contents:query) -(description:query)