Hi Steve, Thanks for the clarification! Now I understand what this function is for. (I tried "term1-term2" and indeed it's parsed into a phrase query)
I was trying to save typing the quotation marks as most of my use cases are phrase search. Seems this can't be done for now :) Best, Gang On Mon, Dec 5, 2016 at 9:06 AM Steve Rowe <sar...@gmail.com> wrote: > Hi Gang, > > The javadoc explanation isn’t very clear, but the process is: > > 1. Split query on whitespace (‘term1 term2’ is split into ‘term1’ and > ‘term2’) > 2. For each split term: if autoGeneratePhraseQueries=true, and analysis > produces more than one term, for example a synonym ’term1’->’multiple word > synonym’, then a phrase query will be created. > > In the example you give, after splitting and analysis, there is only one > term, so phrase queries will not be produced. > > A workaround: insert quotation marks at the start and end of the query. > > -- > Steve > www.lucidworks.com > > > On Dec 4, 2016, at 4:39 PM, Gang Li <leemag...@gmail.com> wrote: > > > > Hi everyone, > > > > I'm trying to make the QueryParser parse a raw query without quotes into > a > > phrase query by default, and according to Lucene doc it seems I can use > the > > method setAutoGeneratePhraseQueries(). ( > > > http://lucene.apache.org/core/6_2_0/queryparser/org/apache/lucene/queryparser/classic/QueryParserBase.html#setAutoGeneratePhraseQueries-boolean- > > ) > > > > But after I call parser.setAutoGeneratePhraseQueries(True), the parser > > still doesn't produce a phrase query. Please see the code example below. > > > > I'm using Ubuntu 16.04, Java 1.8, Pylucene (Lucene version 6.2.0). All > the > > tests are passed by running "make test" under pylucene folder. > > > > import lucene > > from org.apache.lucene.analysis.standard import StandardAnalyzer > > from org.apache.lucene.queryparser.classic import QueryParser > > from org.apache.lucene.search import PhraseQuery > > from org.apache.lucene.index import Term > > > > > > jcc_env = lucene.initVM(vmargs=[str('-Djava.awt.headless=true')]) > > > > # Parse raw query. > > > > > > analyzer = StandardAnalyzer() > > parser = QueryParser('field', analyzer) > > # Auto generate phrase query over multiple terms. > > > > > > parser.setAutoGeneratePhraseQueries(True) > > > > # This prints field:term1 field:term2, but it should be field:"term1 > term2" > > > > > > print parser.parse('term1 term2') > > > > # Build a phrase query. > > > > > > builder = PhraseQuery.Builder() > > builder.add(Term('field', 'term1')) > > builder.add(Term('field', 'term2')) > > > > # This prints field:"term1 term2", which is correct. > > print builder.build() > > > > Does anyone know how to make it work? Thank you! > > > > Gang > >
