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
