I am using Lucene 8.2.0 in Java 11.
I am trying to index a Long
value so that I can filter by it using a range query, for example like so: +my_range_field:[1 TO 200]
. However, any variant of that, even my_range_field:[* TO *]
, returns 0
results in this minimal example. As soon as I remove the +
from it to make it an OR
, I get 2
results.
So I am thinking I must make a mistake in how I index it, but I can't make out what it might be.
From the LongPoint
JavaDoc:
An indexed long field for fast range filters. If you also need to store the value, you should add a separate StoredField instance. Finding all documents within an N-dimensional shape or range at search time is efficient. Multiple values for the same field in one document is allowed.
This is my minimal example:
public static void main(String[] args) {
Directory index = new RAMDirectory();
StandardAnalyzer analyzer = new StandardAnalyzer();
try {
IndexWriter indexWriter = new IndexWriter(index, new IndexWriterConfig(analyzer));
Document document1= new Document();
Document document2= new Document();
document1.add(new LongPoint("my_range_field", 10));
document1.add(new StoredField("my_range_field", 10));
document2.add(new LongPoint("my_range_field", 100));
document2.add(new StoredField("my_range_field", 100));
document1.add(new TextField("my_text_field", "test content 1", Field.Store.YES));
document2.add(new TextField("my_text_field", "test content 2", Field.Store.YES));
indexWriter.deleteAll();
indexWriter.commit();
indexWriter.addDocument(document1);
indexWriter.addDocument(document2);
indexWriter.commit();
indexWriter.close();
QueryParser parser = new QueryParser("text", analyzer);
IndexSearcher indexSearcher = new IndexSearcher(DirectoryReader.open(index));
String luceneQuery = "+my_text_field:test* +my_range_field:[1 TO 200]";
Query query = parser.parse(luceneQuery);
System.out.println(indexSearcher.search(query, 10).totalHits.value);
} catch (IOException e) {
} catch (ParseException e) {
}
}
I found the solution to my problem.
I was under the impression that the query parser could just parse any query string correctly. That doesn't seem to be the case.
Using
Query rangeQuery = LongPoint.newRangeQuery("my_range_field", 1L, 11L);
Query searchQuery = new WildcardQuery(new Term("my_text_field", "test*"));
Query build = new BooleanQuery.Builder()
.add(searchQuery, BooleanClause.Occur.MUST)
.add(rangeQuery, BooleanClause.Occur.MUST)
.build();
returned the correct result.